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Numéro de publicationUS3114417 A
Type de publicationOctroi
Date de publication17 déc. 1963
Date de dépôt14 août 1961
Date de priorité14 août 1961
Numéro de publicationUS 3114417 A, US 3114417A, US-A-3114417, US3114417 A, US3114417A
InventeursMccarthy Patrick B
Cessionnaire d'origineErnest T Saftig, Paul F Loveridge, Peggy L Mccarthy, Stansbury Burton J
Exporter la citationBiBTeX, EndNote, RefMan
Liens externes: USPTO, Cession USPTO, Espacenet
Electric oil well heater apparatus
US 3114417 A
Résumé  disponible en
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Revendications  disponible en
Description  (Le texte OCR peut contenir des erreurs.)

Dec. 17, 1963 P. B. MCCARTHY ELECTRIC OIL WELL HEATER APPARATUS 3 Sheets-Sheet 1 Original Filed March 4, 1958 Patrick 8. McCarthy,

INVENTO/P. By M ATTORI/EX P.B.MCARTHY ELECTRIC OIL WELL HEATER APPARATUS Original Filed March 4, 1958 Dec. 17, 1 963 3 Sheets-Sheet 2 Fig. 2.

A Patrick B. McCqrth INVEN TOR.

ATTORNEX Dec. 17, 1963 P. B. MCCARTHY ELECTRIC OIL WELL HEATER APPARATUS 3 SheetsSheet 3 Original Filed March 4, 1958 h I r G C W c M X B W E .K T N C M W m r w DnWWB 4 United States Patent 3,114,417 ELECTRIC OIL WELL HEATER APPARATUS Patrick E. McCarthy, Van Nuys, Caliil, assignor, by direct and mesne assignments, of twenty percent to Ernest T. Saftig and twenty percent to Burton J. Stansbury, Newport Beach, and twenty percent to Paul F. Lover-ridge, Santa Ana, Calif., and forty percent to Peggy L. McCarthy Continuation of application Ser. No. 719,020, Mar. 4, 1958. This application Aug. 14, 1961, Ser. No. 134,798 16 Claims. (Cl. 166-60) The present invention relates to oil well apparatus, and more particularly to subsurface heaters adapted to be installed in the well bore for the purpose of heating the well production therewithin.

The present application is a continuation of application Serial No. 719,020, filed March 4, 1958, for Electric Oil Well Heater Apparatus, now abandoned.

An object of the present invention is to provide electric heater apparatus for heating the oil within a well bore, to which current is conducted through an appropriate electric cable disposed in the well here, in which the electric cable is not subject to the high temperature at which the heater might be operating, thereby avoiding deterioration or breakdown of the cable insulation and preventing failure of the electric heater circuit.

Another object of the invention is to provide an electric heater for installation in a well bore, which is not susceptible to short circuiting.

A further object of the invention is to provide an electric heater for use in a well bore, which is not susceptible to the deleterious effects of the fluent substances in the well bore, such as acids, salt water, and the like, and which is also not susceptible to electrolytic action in the well bore, such as electrolytic corrosion.

Yet another object of the invention is to provide an electric heater apparatus for use in a well bore to elevate the temperature of the production in the well bore, in which the passage of current to the heater is controlled automatically in response to the Well temperature in the region of the heater.

An additional object of the invention is to provide an electric heater apparatus for use in a well bore, in which the passage of current to the heater is controlled automatically by the temperature in the well bore at the region of the heater, the temperature at which control is effected being readily varied at the top of the well bore. Adjustment of the temperature at which control is eiiected can be made over a wide range from the top of the well bore, at any time.

Still a further object of the invention is to provide an electric heater apparatus to be used in a well bore, which is comparatively simple, economical to manufacture, and of strong and sturdy construction, making the heater easily transportable and not subject to damage while in transit.

Another object of the invention is to provide an electric oil well heater that can be installed at any point in the production string which extends to the top of the Well bore.

Still a further object of the invention is to provide electric oil well heater apparatus in which the passage of current to the well heater is controlled by a resistance element responsive to the heat in the Well bore and through which direct current passes, the direct current making it unnecessary to shield the length of cable in the well bore, which shielding would be required it alternating current were used, to avoid changes in capacitance and inductance in the equipment. The use of alternating current in the control circuit would require extensive and expensive shielding of the cable extending from the top of the well bore to the electric heater there- Within.

This invention possesses many other advantages, and has other objects which may be made more clearly apparent from a consideration of a form in which it may be embodied. This form is shown in the drawings accompanying and forming part of the present specification. It will now be described in detail, for the purpose of illustrating the general principles of the invention; but it is to be understood that such detailed description is not to be taken in a limiting sense, since the scope of the invention is best defined by the appended claims.

Referring to the drawings:

FIGURE 1 is a longitudinal section through a well bore, illustrating diagrammatically one use of the invention therein;

FIGS. 2 and 2a together constitute a longitudinal section, parts being shown in side elevation, through a well heater apparatus, FIG. 2a constituting a lower continuation of FIG. 2;

FIG. 3 is a cross-section on a reduced scale taken generally along the line 33 on FIG. 2a;

FIG. 4 is a top plan view of the end closure plate of the heater;

FIG. 5 is a cross-section on a reduced scale taken along the line 55 on FIG. 2a;

FIG. 6 is a side elevational view of the heater at an intermediate stage of its manufacture;

FIG. 7 is a diagrammatic view of the electrical control circuit for the heater;

FIG. 8 is an enlarged longitudinal section of a portion of the apparatus in the region of connection of one of the electrodes to a power line.

The heater apparatus A disclosed in the drawings is adapted to be disposed at a desired location in a body of oil or other well production B in a well bore C that has a casing D therein extending to the top of the well bore. The heater is secured at the appropriate point to a tubular string E extending to the top of the well bore. In fact, it actually forms part of the tubular string itself. This tubular string may have the usual pump mechanism therein, including a standing valve F and a traveling piston G, which is connected to a string of sucker rods H extending through the production tubing E to the top of the well bore for attachment to reciprocating pump operating apparatus, such as a walking beam (not shown) or a hydraulically operating mechanism (not shown).

The well production elevated by the pump in the tubing string will pass out through the usual outlet pipe I at the top of the hole to a storage tank or pipe line (not shown).

The electric heater includes an inner tubular member 10 having an upper threaded pin 11 for threaded attachment to an upper adjacent section of the tubing E. It may also have a lower threaded pin 12 for threaded attachment to a lower section of tubing 13- that may be perforated to provide an inlet 14 for the well production into the tubing string E, the well production passing upwardly through the inner tubing 10' and through the pump portion thereof F, G- for lifting to the top of the well bore.

Surrounding the inner production tubing 10 is an outer tubing 15 that is spaced from the inner tubing to pro vide an annular chamber 16 therebetween, in which the resistance heating device of the heater is disposed. This resistance heating device includes a resistance wire 17 disposed within a tube 18, preferably made of stainless steel to avoid corrosion and electrolytic action in the well bore. The tube 18 has one portion 19 extending down along one side of the annular chamber 16 from the upper end thereof substantially to its lower end, which merges into an intermediate portion 2% extending arcuately around the inner tube 10, which, in turn, merges into another arm or leg portion 21 that extends upwardly through the chamber 16 to the top thereof substantially diametrically opposite the other leg 18 of the tube. The stainless steel tube 18 is preferably of one piece, with its intermediate portion 21] bent around the inner tubular member 16) substantially 180 degrees, so that the two arms or legs 1?, 21 of the tube are diametrically opposite one another.

The resistance wire 17 extends throughout one leg of the tube 19, through its intermediate portion 20, and throughout the other leg 21 of the tube. An upper end of the wire is suitably secured, as by welding, to a conductor or electrode 22 extending upwardly through an extension 23 of the tube, its other end being secured, as by welding, to a second conductor or electrode 24 extending upwardly through another extension 25 of the tube. Disposed between the resistance wire 17 and the tube 18, and also between the electrode 22, 24 and the tubing extensions 23, 25, is electrical insulation material 26, such as magnesium oxide, which may initially be in a powder state and which is highly compacted, to retain the resistance wire 17 and conductors 22, 24 appropriately spaced from the inner wall of the generally U- shaped tube 18, and to insure the transfer of heat from the resistance wire 17 through the insulation to the stainless steel tubing 18.

The lower end of the annular chamber 16 is closed by a lower end plate 27 which is secured, as by welding material 28, to the lower end of the outer tube 15 and to the periphery of the inner tube 10. Similarly, the chamber 16 is closed by an upper end plate 29 which has a central bore 3G to permit passage therethrough of the inner tube 10, and diametrically opposite smaller bores 31 through which the two legs 19, 21 of the heater device pass. This upper end plate 29 may also be secured, as by welding material 32, to the upper end of the outer protective tubing 15, to the inner tubing and to the stainless steel tubular legs 19, 21 themselves.

The heater device between the upper and lower end plates 29, 27 maybe of any desired length. For example, the length may be about twenty-five feet, providing about fifty feet of resistance wire 17 contained within the stainless steel tube '18. The heater device is appropriately secured to the inner tube '10 by longitudinally spaced bands or straps 33 passing around the arms 19, 21 of the tube 18 and the inner tubing 10, the ends of each strap being firmly secured to one another in any suitable manner, as through use of a clamp device 34 usually employed in applying straps around packing boxes or cases. After the heater device 18 has been appropriately secured to the inner tube 10 by the straps along the region where the elongate chamber is to be formed (FIG. 6), the outer tube can then be slipped over this assembly and the upper and lower end plates 29, 27 placed in appropriate relation to the apparatus and welded to the inner and outer tubes 10, 1 5, with the upper end plate 29 also welded to the arms 19, 21 of the heater device. The extensions 23, '25 above the plate 29 may also be secured to the inner tubing 10 by longitudinally spaced straps or hands 33a.

Current is fed to the heater device through an insulated cable 35 suitably attached to the production tubing E and extending to the top of the well bore. This cable has a total of four conductors or lines 36, 37, 38, 39 therein, one of which 36 is connected to one of the conductors or electrodes 22, and the other of which 37 is connected to the other conductor or electrode 24. The other two conductors 38, 39 of the cable 35 may be used in association with a thermally responsive control device or thermistor 40 for determining the application of current to the resistance element 17, which will be described 'hereinbelow.

The power conductors 36, 37 are not connected to the electrodes 22, 24 near the resistance wire 17, but are attached to such electrodes at a point remote from the resistance wire, such that the insulation 41 surrounding the power conductor lines is not subjected to the relatively high temperature of the resistance rwire. As disclosed in the drawings, the tubular arm extensions 23, 25 extend upwardly above the upper end plate 29 and the ends of the resistance element 17 to a substantial extent, which may be of the order of about twenty feet. The conductors 22, 24 project through the tubing extensions 23, 24 for its full length, being insulated from the wall of such extensions by the insulating material 26, which may be the same material as surrounds the resistance element 26. The electrodes 22, 24 may project upwardly beyond the upper ends of the stainless steel tubing extensions 23, 25, where each electrode 22 or 24 is suitably spliced to a companion power conductor 36 or 37.

A cable sheath 43 surrounds the upper portion of each tubular extension 23, 25, its lower end being suitably secured and sealed, as by solder 44, to the periphery of such extension. The connection 4 5 between each electrode 22, 24 and the power conductor 36, 37 may also be soldered together, the cable sheath 43 projecting upwardly around such connection and thereabove to a substantial extent, surrounding the insulated conductor 41 itself. Suitable i-nsulating material 4 6, such as porcelain, may be disposed within each sheath 43 and around the connection 42-5 between each electrode and associated power conductor, this insulating material also extending upwardly to cover the insulation 41 of the cable or conductor 36, 37 itself. The upper portion of each insulated cable 36, 37 may also contain a suitable insulating and sealing material 47 capable of being cast into the sheath 43 around the cable.

In the use of the heater, current from a suitable source passes down through one of the power cable lines .36 to one of the electrodes 22, then flowing through the resistance wire 17 along one arm 19 of the heater device, around the intermediate portion of the resistance wire, and up through the resistance wire portion in the other arm 21 of the device to the other electrode 24, which is con nected to the second line 37 of the power cable extending to the source of electrical energy. When the heater apparatus A has been installed at the appropriate location in the well bore, it will heat the oil in the well bore surrounding the outer protective tubing 15 by the transmission of heat from the resistance wire 17 through the electric insulation 26 to the stainless steel tube 18, and from the latter through the outer tubing 15. Heat will also be transmitted through the inner tubing 10 to the oil flowing upwardly therewithin. Thus, the oil in the well bore is subject to the heat emanating from the heater apparatus externally thereof and also internally thereof. The oil passes through the inlet openings 14 of the tubing upwardly through the inner production tubing 10 and through the standing valve F, the pump G then elevating the production through the production tubing E to the top of the well bore in response to reciprocation of the sucker rods H.

The annular chamber 16 may either be sealed against entry of fluid, or it may be provided with upper openings 50 in its upper end and lower openings 51 in its lower end, to permit the well production to pass into the chamber for direct contact with the stainless steel tubing 18 of the heater device. The oil can have no harmful effects on such member since it is preferably made of stainless steel. It cannot adversely afiect the resistance wire 17, since such wire is fully sealed within the stainless steel tube 1 8. The heated oil will probably enter through the lower openings 51 and, as its temperature is increased, will pass out through the upper openings 50, then being drawn downwardly, as the pumping action occurs, around the outer tubing 15 toward the inlet 14, the oil then passing upwardly through the inner tubing '10 where it is subject to i e heat transmitted to the inner tubing from the heater device and the oil in the chamber 16.

If desired, the chamber may be sealed and suitable heat conducting material disposed therein, such as powdered aluminum or steel. The presence of the powdered aluminum or steel completely filling the chamber 16 insures good heat conduction from the stainless steel tube 18 to both the inner production tubing and the outer protective shield or tubing 15.

The electrodes 22, 24 within the extensions 23, 25 of the stainless steel tubing 18 have very low resistance and will not be elevated in temperature to any significant extent by the current passing therethrough. Inasmuch as the point at which the splice 45 to each power cable is made is quite remote from the resistance element 17, the splice is not subjected to the high temperature of the latter, which is also true of the insulation 41, 46. The subjecting of the cable insulation 41 to a comparatively low temperature insures against its breakdown and against its possible short circuiting. It is also to be noted that the stainless steel tubing 18 fully protects the resistance wire 17 and the electrodes 22, 24 leading therefrom and prevents any short circuiting of these elements. The stainless steel tube 18 contacts the inner and outer tubing 10, 15, the end plate 29, and other conductive portions of the apparatus, but the resistance element 17 and the electrodes 22, 24 cannot have such contact in view of their full and complete encompassing by the insulating material 26. The portions 36, 37 of the power cable and the upper ends of the electrodes 22, 24 at their interconnections 45 are all fully protected by insulating material, the upper portions being fully sealed against leakage of the oil or other fluids in the well bore into the heater device through the upper shields 43.

The application of heating current to the heater device A is governed by the temperature in the region of the heater device itself. Such temperatures may be varied readily at the top of the well bore. When the preselected temperature is exceeded, the circuit to the heater device is opened. When the temperature drops below a predetermined degree, then the circuit is closed again and current allowed to pass through the resistance heating element 17.

As specifically shown in FIG. 7, current from a main line 60 may pass through a power switch 61, when the latter is closed, to a power relay 62, the power cable leads 36, 37 being connected to such relay and extending down to the oil well heater resistance 17. The relay 62 includes pairs of spaced apart contacts 63 that can be bridged by movable switch or bridge pieces 64 when current passes through the coil 65 of the power relay. Passage of current through such coil is dependent upon the closing of a control relay switch 66, which, in turn, is closed in dependence upon the temperature in the region of the well heater A, which acts upon the thermistor or temperature sensing element 40 incorporated in the heater. When the temperature decreases below a predetermined value, the control relay 66 will close, and when the temperature rises above a predetermined value, the control relay will open.

A contact 67 of the control relay is connected through a suitable lead 68 to one end of the power relay coil 65. The other end of this coil 65 is connected through a suitable lead 69 to one line 70 extending from the secondary coil 71 of a step-down transformer 72, the primary 73 of which is connected across the power line 60 when switch 61 is closed. The other line 74 of this step-down transformer is connected through a suitable lead 75 to the switch arm 76 of the control relay 66. It is evident that when the switch arm 76 engages the control relay contact 67, the circuit through the power relay coil 65 is completed, causing it to close the power relay 62 and complete the circuit through the oil well heater element 17. If desired, a suitable flow switch 76 may be incorporated in one of the lines 68 connected to the power relay coil 65, this flow switch being connected to the prime mover (not shown) operating the deep well pump such that the flow switch is automatically opened when the prime mover ceases operation.

The thermistor 40 is mounted in the annular chamber 16 between the innerand outer tubing members 10, 15 and consists of a resistance element 80 (FIG. 7) contained within a suitable housing afiixed to a coupling 81 which is threaded in a mounting block 82 suitably attached, as by welding, to the inner tubular member 10. A protective tubing 83, which may be made of stainless steel, is threadedly secured onto the coupling 81, the two leads 38, 39 connected to each end of the resistance element 80 being insulated from one another and also being surrounded by suitable insulation of a two-line cable 84 that extends upwardly through the tubing 83, which extends through a hole 85 in the upper end plate 29. Suitable insulation 86 is preferably provided between the cable 84 and the tubing 83 of the temperature responsive portion of the apparatus. The stainless steel control tube 83 may also be welded to the upper end plate 29, and this control tubing will extend upwardly to the same location as the arm extensions 23, 25, the two insulated lines 38, 39 also being encased within the same cable structure 35 and extending along the production tubing E to the top of the Well bore.

An electronic control circuit is employed for determining the passage of current through the control relay 66. Such control circuit may be of any suitable design and has provision for varying the temperature at which current will pass through the control relay coil 90 and be discontinued from passing through such coil.

As disclosed in FIG. 7, the control is elfected by an electronic bridge circuit. The lines 70, 74 leading from the secondary coil 71 of the step-down transformer 72 are also connected to the primary coil 91 of a controller transformer 92. The voltage is stepped down to a further extent to one secondary coil 93, a lead 94 extending from this coil being grounded. One end of the control relay coil 90 is connected through a suitable line 95 to the plate 96 of an amplifier tube 97, such as a triode, which has a grid 98 and a cathode 99 in its envelope. A heater 100 for the cathode has one end connected to a line 101 running to an end of another secondary coil 102 of the controller transformer 92 which has a relatively low voltage induced therein, the other end of this transformer coil being connected through a line 103 to the other end of the heater 100 and also to the cathode 99.

The grid voltage of the relay amplifier 97 is controlled by a signal amplifier 104, the operation of which is dependent upon the resistance of the thermistor 80, which is related to the temperature of the thermistor. The thermistor is made of a material, such that its resistance decreases as the temperature in the well increases and, conversely, its resistance increases as the temperature in the well decreases. One end of the line 39 from the thermistor is connected through a suitable load resistance 105 to the grid 106 of the double triode 104. One plate 107 of this triode is connected through a suitable resistance 108 to a line 109 running to a rectifier 110 connected to the other end of the secondary coil 93 of the controller transformer 92 and also to the other end of the control relay coil 90. The cathode 111 of the same section of the double triode is connected through a resistance 112 to a temperature controller 113, in the form of a potentiometer, incluing a variable resistance element 114 and an arm 115 shiftable across this resistance element. One end of the temperature controller resistance 114 is connected to one of the lines 103, its other end being connected to ground and also to one of the leads 38 running to the thermistor 80. The other lead 39 extending from the thermistor is connected through a suitable resistance 116 to the line 103 running to the cathode 99 of the relay amplifier 97.

The current from the plate 197 of the double triode passes through a line 117 to a condenser 118 that is con- .nected through another line 11% to the second grid 12% of the double triode tube 164. This line 119 is also connected through a resistance 1 21 to the other cathode 122 of the tube, the resistance 121 being suitably grounded. The other plate 123 of the double triode tube is connected through a resistance 124 to the rectifier 11d, and is also connected through a lead r125 to a condenser 126, another lead 127 from the condenser being connected to the grid 98 of the relay amplifier 97. The relay amplifier circuit also includes a resistance 12? connected to ground and also to the grid 93, as well as a condenser 129 conneoted across this resistance. The cathodes 111, 122 of the signal amplifier 1&4 are energized by heater 130 connected in series, one heater being connected to one of the 'lines 101 and the other heater being connected to the other line M3.

The only portions of the control apparatus, illustrated diagrammatically in FIG. 7, disposed in the well bore are the thermistor '89, 43%} and the two lines 38, '39 connected thereto and running upwardly to the top of the hole. The remainder of the apparatus is above ground.

As the temperature in the well bore changes, so does the temperature of the sensing element 3t) change. As its temperature changes, its resistance also changes. This change of resistance is compared with the preset resistance on the potentiometer 113, which is adjustable by moving the arm 115 over the resistance 114. if the resistance of the sensing element 84 is higher than the preset resistance of the temperature controller, the voltage on the control grid 1% is decreased and more current passes to the plate 107 of the double triode, which, in turn, decreases the voltage on the other grid 12%, allowing a still greater amount of current to pass through the other plate 123 and to the grid 98 of the relay amplifier tube 97. When the grid voltage of the relay amplifier tube reaches the required value, then more current will fiow to the plate 96 and to the coil 96 of the control relay, causing it to beenergized and closing the relay 66. This closing of the control relay 66 completes the circuit of the power relay coil 65, causing the power relay 62 to close and completingthe circuit to the heater element 17.

As the heat in the well increases, the resistance of the thermistor or sensing element 8! decreases. When the heat increases sufficiently, its resistance equals the set resistance of the temperature controller 113. With equality in these resistances, the signal in the signal amplifier tube 1% decreases, which decreases. the current in the relay amplifier tube 97 and the current passing to the relay coil $0, causing the control relay 66 to open and, consequently, effecting opening of the main power relay 62, which discontinues the application of current to the oil well heater element 17.

As the heat in the well then decreases, because of the open circuit to the oil well heater, the resistance of the sensing element or thermistor 88 increases, the signal to the signal amplifier tube 10 4 increasing and thereby in creasing the current in the relay amplifier tube 97. When such current increases sufliciently, the current passing through the control coil 90 will move the switch arm 76 into engagement with the contact 67, closing the relay switch 66 and completing the circuit to the power relay coil 65 once again, which will again cause the power relay switch 62 to close and cause current to again pass to the oil well heater 17.

The foregoing action is repeated intermittently, the heater '17 supplying heat when the temperature drops below a predetermined value and discontinuing the supply of heat when the temperature rises to a predetermined 'value. By changing the pre-set resistance of the temperature controller or potentiometer 113, the temperature at which power will be supplied to the heater l7, and at which the application. of power to the heater will be discontinued, can be varied.

The rectifier ldtl provides direct current in the control circuit including the conductors 38, 39, which are in the same cable as the power conductors 35, 37. it alternating current in the electronic control circuit were used, shielding of the conductors 38, 39 would be necessary to avoid changes in capacitance and inductance in the equipment. Such changes in capacitance and inductance would prevent proper and accurate functioning of the control circuit in determining the passage of current through the electric heater and would prevent maintenance of the temperature in the well bore at the preselected value. The use of direct current, however, makes it unnecessary to shield the cable, and yet results in proper control or" current through the heater and maintenance of the well bore temperature. The lack of need to shield the cable saves considerable cable expense.

The heater apparatus illustrated is of strong and sturdy construction, and is not susceptible to damage while being transported to and from the well location. The heater is easy to install, and it cannot be overheated because of the automatic control of its operating temperature. Its insulated portions are not subjected to inordinately high temperature, and, therefore, are not susceptible to failure, such as short circuiting. in addition, the power cables 3-6, 3'7 running to the top of the well bore are not susceptible to insulation failures, inasmuch as their insulation is relatively remote from the point of application of heat. Since the inner tube ltl is essentially the same as the oil well production tubing itself, the heater can be installed at any desired location in the tubing string E. For that matter, a plurality of heaters can be installed at ditierent points along the tubing string. The operating temperature of the heater is easily varied from the top of the hole, in order that optimum production from the well bore can be secured.

The inventor claims:

1. In well heater apparatus: a tubular member adapted to be connected to production tubing and lowered in a well bore whereby well production can flow through said tubular member and into the productin tubing; an electric heating means adjacent to said tubular member to heat the well production therewithin; an electric circuit connected to said heating means extending to the top of the well bore; thermally responsive resistance means in the well bore adjacent to said tubular member and responsive to the heat in the well bore; and means including a source of current external of the well bore connected to said resistance means and circuit and responsive to change in resistance of said resistance means for selectively opening or closing said circuit.

2. In a well heater apparatus: a tubular member adapted to be connected to production tubing and lowered in a well bore whereby well production can flow through said tubular member and into the production tubing, an electric heating means adjacent to said tubular member to heat the well production therewithin; an electric circuit connected to said heating means extending to the top of the well bore; means for selectively opening and closing said circuit including thermally responsive resistance means in the well bore adjacent to said tubular member and responsive to the heat in the well bore; and means at the top of the well bore including a source of cunrent for said resistance means external of the well bore adapted to be adjusted for varying the effective operating temperature of said thermally responsive means.

3. In well heater apparatus: a tubular member adapted to be connected to production tubing and lowered in a well bore whereby well production can flow through said tubular member and into the production tubing; an electric heating means adjacent to said tubular member to heat the well production therewithin; an electric circuit connected to said heating means extending to the top of the well bore; thermally responsive resistance means in the well bore adjacent to said tubular member and responsive to the heat in the well bore; means including a source of current external of the well bore connected to said resistance means and circuit and responsive to change in resistance of said resistance means for selectively opening or closing said circuit; and means at the top of the well bore for varying the resistance at which said resistance means effects selective opening or closing of said circuit.

4. In a subsurface well heating apparatus: an inner tubular member through which well production is adapted to be conducted; an outer tubular member surrounding said inner member; means mounting said outer member in spaced relation to said inner member; tubing between said members including circumferentially spaced portions extending lengthwise of said members and an intermediate portion disposed arcuately around said inner member and interconnecting said spaced portions; resistance wire in said spaced port-ions and intermediate portion insulated from said tubing; said spaced portions extending upwardly to a point remote from the upper ends of said resistance wire; low resistance electrodes in said spaced portions connected to said resistance wire and insulated from said tubing; said electrodes having means at the upper ends of said spaced portions for connection to adjacent power lines; said point being sufiiciently remote from the upper ends of said resistance wire such that substantial heat from the resistance wire is not transferred to the upper ends of said electrodes and to the adjacent power lines when connected thereto.

5. In a subsurface well heating apparatus: an inner tubular member through which well production is adapted to be conducted; an outer tubular member surrounding said inner member; means mounting said outer member in spaced relation to said inner member; a one-piece tubing between said members including a lower intermediate portion disposed arcuately around said inner member and merging into circumferentially spaced portions extending upwardly therefrom lengthwise of said members; resistance wire in said spaced portions and intermediate portion insulated from said tubing; said spaced portions extending upwardly to a point remote from the upper ends of said resistance wire; low resistance electrodes in said spaced portions connected to said resistance wire and insulated from said tubing; said electrodes having means at their upper ends remote from the upper ends of said resistance wire for connection to adjacent power lines; said point being sufiiciently remote from the upper ends of said resistance wire such that substantial heat from the resistance wire is not transferred to the upper ends of said electrodes and to the adjacent power lines when connected thereto.

6. In a subsurface well heating apparatus: an inner tubular member through which well production is adapted to be conducted; an outer tubular member surrounding said inner member and spaced therefrom; upper and lower closure members around said inner tubular member secured to said tubular members; tubing between said tubular members including a lower intermediate portion disposed arcuately around said inner member above said lower closure member and merging into circumferentially spaced portions extending upwardly therefrom lengthwise of said tubular members and projecting through said upper closure member; resistance wire in said spaced portions and intermediate portion insulated from said tubing; said spaced portions extending upwardly to a point remote from the upper ends of said resistance wire; low resistance electrodes in said spaced portions connected to said resistance wire and insulated from said tubing; said electrodes having means at the upper ends of said spaced portions for connection to adjacent power lines; said point being sufliciently remote from the upper ends of said resistance wire such that substantial heat from the resistance wire is not transferred to the upper ends of said electrodes and to the adjacent power lines when connected thereto 7. In a subsurface well heating apparatus: an inner tubular member through which well production is adapted to be conducted; an outer tubular member surrounding said inner member; means mounting said outer member in spaced relation to said inner member; tubing between said members including circumferentially spaced portions extending lengthwise of said members and an intermediate portion disposed arcuately around said inner member and interconnecting said spaced portions; resistance wire in said spaced portions and intermediate portion insulated from said tubing; electrodes in said spaced portions connected to said resistance wire and insulated from said tubing; said electrodes having means for connection to adjacent power lines; and thermally responsive means in the space between said tubular members, including a control tubing, a thermal sensing element carried by said control tubing, and electric leads connected to said sensing element and extending through said control tubing.

8. In a subsurface well heating apparatus: an inner tubular member through which well production is adapted to be conducted; an outer tubular member surrounding said inner member and spaced therefrom; upper and lower closure members around said inner tubular member secured to said tubular members; tubing between said tubular members including a lower intermediate portion disposed arcuately around said inner member above said lower closure member and merging into circumferentially spaced portions extending upwardly therefrom lengthwise of said tubular members and projecting through said upper closure member; resistance wire in said spaced portions and intermediate portion insulated from said tubing; said spaced portions extending upwardly to a point remote from the upper ends of said resistance wire; low resistance electrodes in said spaced portions connected to said resistance wire and insulated from said tubing; said electrodes having means at the upper ends of said spaced portions for connection to adjacent power lines; said point sufficiently remote from the upper ends of said resistance wire such that substantial heat from resistance wire is not transferred to the upper ends of said electrodes and to the adjacent power lines when connected thereto; and thermally responsive means, including con trol tubing in the space between said tubular members and extending through said upper closure member, a thermal sensing element in said space and carried by said control tubing, and electric leads connected to said sensing element and extending through said control tubing.

9. In a subsurface well heating apparatus: an inner tubular member through which well production is adapted to be conducted; an outer tubular member surrounding said inner member and spaced therefrom; upper and lower closure members around said inner tubular member secured to said tubular members; tubing between said tubular members including a lower intermediate portion disposed arcuately around said inner member above said lower closure member and merging into circumferentially spaced portions extending upwardly therefrom lengthwise of said tubular members and projecting through said upper closure member; resistance wire in said spaced portions and intermediate portion insulated from said tubing; said spaced portions extending upwardly to a point remote from the upper ends of said resistance wire; low resistance electrodes in said spaced portions connected to said resistance wire and insulated from said tubing; said electrodes having means at the upper ends of said spaced portions for connection to adjacent power lines; said point being sufiiciently remote from the upper ends of said resistance wire such that substantial heat from the resistance wire is not transferred to the upper ends of said electrodes and to the adjacent power lines when connected thereto; said outer tubular member having upper and lower openings therethrough to allow ingress and egress of the well production into and from the space between said tubular members.

10. In well heater apparatus: an inner tubular member through which well production is adapted to be conducted; an outer tubular member surrounding said inner member; means mounting said outer member in spaced relation to said inner member; tubing between said members including oircumterentially spaced portions extending lengthwise of said members and an intermediate portion disposed arcuately around said inner member and interconnecting said spaced portions; resistance wire in said spaced portions and intermediate portion insulated from said tubing; electrodes in said spaced portions connected to said resistance wire and insulated from said tubing; an electric circuit for said resistance Wire connected to said electrodes and extending therefrom to the top of the well bore; thermally responsive means in the space between said tubular members, including a control tubing, a thermal sensing element carried by said control tubing, and electric leads connected to said sensing element and extending through said control tubing; and means connected to said leads and electric circuit and responsive to change in temperature of said sensing element for selectively opening or closing said circuit.

11. In well heater apparatus: a tubular member adapted to be connected to production tubing and lowered in a Well bore whereby well production can fiow through said tubular member and into the production tubing; an electric heating means adjacent to said tubular member to heat the well production therewithin; an electric circuit connected to said heating means extending to the top of the well bore; thermally responsive resistance means in the well bore adjacent to said tubular member and responsive to the heat in the well bore; and means including a source of direct current external of the well bore connected to said resistance means and circuit and responsive to change in resistance of said resistance means for selectively opening or closing said circuit.

12. In well heater apparatus: a tubular member adapted to be connected to production tubing and lowered in a well bore whereby Well production can flow through said tubular member and into the production tubing; an electric heating means adjacent to said tubular member to heat the well production therewithin; an electric circuit connected to said heating means extending to the top of the well bore; means for selectively opening and closing said circuit including thermally responsive resistance means in the well bore adjacent to said tublar member and responsive to the heat in the well bore; and means at the top of the well bore including a source of direct current for said resistance means external of the well bore adapted to be adjusted for varying the effective operating temperature of said thermally responsive means.

13. In a well heater apparatus: a tubular member adapted to be connected to production tubing and lowered in a well bore whereby well production can flow through said tubular member and into the production tubing; an electric heating means adjacent to said tubular member to heat the well production therewithin; an electric circuit connected to said heating means extending to the top of the well bore; thermally responsive resistance means in the well bore adjacent to said tubular member and respnsive to the heat in the well bore; means including a source of direct current external of the well bore connected to said resistance means and circuit and responsive to change in resistance of said resistance means for selectively opening or closing said circuit; and means at the top of the well bore for varying the resistance at which said resistance means effects selective opening or closing of said circuit.

14. In Well heater apparatus: a tubular member adapted to be connected to production tubing and lowered in a well bore whereby well production can fiow through said tubular member and into the production tubing; an electric heating means adjacent to said tubular member to heat the well production therewithin; a first electric power circuit connected to said heating means including a power relay at the top of the well here for opening and closing said first circuit; a second control circuit connected to said power relay including a control relay at the top of the well bore for opening and closing said second control circuit; a third circuit including a source of direct current external of the well bore connected to said control relay extending to the top of the well bore; and means for determining the passage of current in said third circuit including thermally responsive means in the well bore adjacent said tubular member responsive to the heat in the well bore.

15. In well heater apparatus: a tubular member adapted to be connected to production tubing and lowered in a well bore whereby well production can fiow through said tubular member and into the production tubing; an electric heating means adjacent to said tubular member to heat the well production therewithin; a first electric power circuit connected to said heating means including a power relay at the top of the Well bore for opening and closing said first circuit; a second control circuit connected to said power relay including a control relay at the top of the well bore for opening and closing said second control circuit; a third circuit for said control relay including a source of direct current external of the well bore, a thermally responsive resistance means adjacent to .said tubular member and responsive to the heat in the well bore, a signal amplifier connected to said resistance means, and a relay amplifier at the top of the well bore connected to said signal amplifier and said control relay.

16. In well heater apparatus: a tubular member adapted to be connected to production tubing and lowered in a well bore whereby well production can flow through said tubular member and into the production tubing; an electric heating means adjacent to said tubular member to heat the well production therewithin; a first electric power circuit connected to said heating means including a power relay at the top of the well bore for opening and closing said first circuit; a second control circuit connected to said power relay including a control relay at the top of the well bore for opening and closing said second control circuit; a third circuit for said control relay including a source of direct current external of the Well bore, a thermally responsive resistance means adjacent to said tubular member and responsive to the heat in the well bore, a signal amplifier connected to said resistance means, a relay amplifier at the top of the well bore connected to said signal amplifier and said control relay, and a temperature adjusting potentiometer at the top of the well bore connected to said resistance means and signal amplifier to vary the temperature to which the resistance means must be subjected for effecting opening and closing of said circuit.

References Cited in the file of this patent UNITED STATES PATENTS 1,915,895 Lewis June 27, 1933 2,525,314 Rial Oct. 10, 1950 2,575,113 Lennox Nov. 13, 1951 2,608,256 Matthews Aug. 26, 1952 2,760,046 Rothacker Aug. 21, 1956 2,771,140 Barclay et al. Nov. 20, 1956 2,808,110 Spitz Oct. 1, 1957 2,881,301 Bowman Apr. 7, 1959 2,893,490 Williams et a1. July 7, 1959 2,932,352 Stegemeier Apr. 12, 1960

Citations de brevets
Brevet cité Date de dépôt Date de publication Déposant Titre
US1915895 *25 mai 193227 juin 1933Lewis Franklin MOil well heater
US2525314 *10 mai 194610 oct. 1950Rial Thomas AElectric oil well tubing heater
US2575113 *7 mai 194913 nov. 1951 Igniter
US2608256 *15 août 194926 août 1952Matthews Don THeater for oil wells and pipe lines
US2760046 *30 nov. 195321 août 1956Modern Plastic Machinery CorpElectronic temperature control device
US2771140 *28 août 195320 nov. 1956Socony Mobil Oil Co IncSubsurface igniter
US2808110 *27 déc. 19551 oct. 1957Electronic Oil Well Heater ComOil well heater
US2881301 *7 nov. 19577 avr. 1959Bowman Hyman DFluid heater
US2893490 *4 avr. 19577 juil. 1959Petro Flow CorpOil well heater
US2932352 *25 oct. 195612 avr. 1960Union Oil CoLiquid filled well heater
Référencé par
Brevet citant Date de dépôt Date de publication Déposant Titre
US3187814 *1 août 19638 juin 1965Lee Mccarthy MargaretElectrical oil well heater apparatus
US4570715 *6 avr. 198418 févr. 1986Shell Oil CompanyFormation-tailored method and apparatus for uniformly heating long subterranean intervals at high temperature
US4616705 *24 mars 198614 oct. 1986Shell Oil CompanyMini-well temperature profiling process
US4886118 *17 févr. 198812 déc. 1989Shell Oil CompanyConductively heating a subterranean oil shale to create permeability and subsequently produce oil
US5060287 *4 déc. 199022 oct. 1991Shell Oil CompanyHeater utilizing copper-nickel alloy core
US5065818 *7 janv. 199119 nov. 1991Shell Oil CompanySubterranean heaters
US5255742 *12 juin 199226 oct. 1993Shell Oil CompanyHeat injection process
US5297626 *12 juin 199229 mars 1994Shell Oil CompanyOil recovery process
US6206093 *24 févr. 199927 mars 2001Camco International Inc.System for pumping viscous fluid from a well
US635370626 oct. 20005 mars 2002Uentech International CorporationOptimum oil-well casing heating
US658168424 avr. 200124 juin 2003Shell Oil CompanyIn Situ thermal processing of a hydrocarbon containing formation to produce sulfur containing formation fluids
US658850424 avr. 20018 juil. 2003Shell Oil CompanyIn situ thermal processing of a coal formation to produce nitrogen and/or sulfur containing formation fluids
US659190624 avr. 200115 juil. 2003Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with a selected oxygen content
US659190724 avr. 200115 juil. 2003Shell Oil CompanyIn situ thermal processing of a coal formation with a selected vitrinite reflectance
US660703324 avr. 200119 août 2003Shell Oil CompanyIn Situ thermal processing of a coal formation to produce a condensate
US660957024 avr. 200126 août 2003Shell Oil CompanyIn situ thermal processing of a coal formation and ammonia production
US668838724 avr. 200110 févr. 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce a hydrocarbon condensate
US669851524 avr. 20012 mars 2004Shell Oil CompanyIn situ thermal processing of a coal formation using a relatively slow heating rate
US670201624 avr. 20019 mars 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with heat sources located at an edge of a formation layer
US670875824 avr. 200123 mars 2004Shell Oil CompanyIn situ thermal processing of a coal formation leaving one or more selected unprocessed areas
US671213524 avr. 200130 mars 2004Shell Oil CompanyIn situ thermal processing of a coal formation in reducing environment
US671213624 avr. 200130 mars 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using a selected production well spacing
US671213724 avr. 200130 mars 2004Shell Oil CompanyIn situ thermal processing of a coal formation to pyrolyze a selected percentage of hydrocarbon material
US671554624 avr. 20016 avr. 2004Shell Oil CompanyIn situ production of synthesis gas from a hydrocarbon containing formation through a heat source wellbore
US671554724 avr. 20016 avr. 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to form a substantially uniform, high permeability formation
US671554824 avr. 20016 avr. 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce nitrogen containing formation fluids
US671554924 avr. 20016 avr. 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with a selected atomic oxygen to carbon ratio
US671904724 avr. 200113 avr. 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation in a hydrogen-rich environment
US672242924 avr. 200120 avr. 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation leaving one or more selected unprocessed areas
US672243024 avr. 200120 avr. 2004Shell Oil CompanyIn situ thermal processing of a coal formation with a selected oxygen content and/or selected O/C ratio
US672243124 avr. 200120 avr. 2004Shell Oil CompanyIn situ thermal processing of hydrocarbons within a relatively permeable formation
US672592024 avr. 200127 avr. 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to convert a selected amount of total organic carbon into hydrocarbon products
US672592124 avr. 200127 avr. 2004Shell Oil CompanyIn situ thermal processing of a coal formation by controlling a pressure of the formation
US672592824 avr. 200127 avr. 2004Shell Oil CompanyIn situ thermal processing of a coal formation using a distributed combustor
US672939524 avr. 20014 mai 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with a selected ratio of heat sources to production wells
US672939624 avr. 20014 mai 2004Shell Oil CompanyIn situ thermal processing of a coal formation to produce hydrocarbons having a selected carbon number range
US672939724 avr. 20014 mai 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with a selected vitrinite reflectance
US672940124 avr. 20014 mai 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation and ammonia production
US673279424 avr. 200111 mai 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce a mixture with a selected hydrogen content
US673279524 avr. 200111 mai 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to pyrolyze a selected percentage of hydrocarbon material
US673279624 avr. 200111 mai 2004Shell Oil CompanyIn situ production of synthesis gas from a hydrocarbon containing formation, the synthesis gas having a selected H2 to CO ratio
US673621524 avr. 200118 mai 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation, in situ production of synthesis gas, and carbon dioxide sequestration
US673939324 avr. 200125 mai 2004Shell Oil CompanyIn situ thermal processing of a coal formation and tuning production
US673939424 avr. 200125 mai 2004Shell Oil CompanyProduction of synthesis gas from a hydrocarbon containing formation
US674258724 avr. 20011 juin 2004Shell Oil CompanyIn situ thermal processing of a coal formation to form a substantially uniform, relatively high permeable formation
US674258824 avr. 20011 juin 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce formation fluids having a relatively low olefin content
US674258924 avr. 20011 juin 2004Shell Oil CompanyIn situ thermal processing of a coal formation using repeating triangular patterns of heat sources
US674259324 avr. 20011 juin 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using heat transfer from a heat transfer fluid to heat the formation
US674583124 avr. 20018 juin 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation by controlling a pressure of the formation
US674583224 avr. 20018 juin 2004Shell Oil CompanySitu thermal processing of a hydrocarbon containing formation to control product composition
US674583724 avr. 20018 juin 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using a controlled heating rate
US674902124 avr. 200115 juin 2004Shell Oil CompanyIn situ thermal processing of a coal formation using a controlled heating rate
US675221024 avr. 200122 juin 2004Shell Oil CompanyIn situ thermal processing of a coal formation using heat sources positioned within open wellbores
US675826824 avr. 20016 juil. 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using a relatively slow heating rate
US676121624 avr. 200113 juil. 2004Shell Oil CompanyIn situ thermal processing of a coal formation to produce hydrocarbon fluids and synthesis gas
US676388624 avr. 200120 juil. 2004Shell Oil CompanyIn situ thermal processing of a coal formation with carbon dioxide sequestration
US676762822 déc. 199927 juil. 2004John G. PosaTape and wrapping materials with edge-finding feature
US676948324 avr. 20013 août 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using conductor in conduit heat sources
US676948524 avr. 20013 août 2004Shell Oil CompanyIn situ production of synthesis gas from a coal formation through a heat source wellbore
US678962524 avr. 200114 sept. 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using exposed metal heat sources
US680519524 avr. 200119 oct. 2004Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce hydrocarbon fluids and synthesis gas
US682068824 avr. 200123 nov. 2004Shell Oil CompanyIn situ thermal processing of coal formation with a selected hydrogen content and/or selected H/C ratio
US686609724 avr. 200115 mars 2005Shell Oil CompanyIn situ thermal processing of a coal formation to increase a permeability/porosity of the formation
US687170724 avr. 200129 mars 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with carbon dioxide sequestration
US687755424 avr. 200112 avr. 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using pressure and/or temperature control
US687755524 avr. 200212 avr. 2005Shell Oil CompanyIn situ thermal processing of an oil shale formation while inhibiting coking
US688063324 avr. 200219 avr. 2005Shell Oil CompanyIn situ thermal processing of an oil shale formation to produce a desired product
US688063524 avr. 200119 avr. 2005Shell Oil CompanyIn situ production of synthesis gas from a coal formation, the synthesis gas having a selected H2 to CO ratio
US688976924 avr. 200110 mai 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with a selected moisture content
US689605324 avr. 200124 mai 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using repeating triangular patterns of heat sources
US690200324 avr. 20017 juin 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation having a selected total organic carbon content
US690200424 avr. 20017 juin 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using a movable heating element
US691053624 avr. 200128 juin 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using a natural distributed combustor
US691307824 avr. 20015 juil. 2005Shell Oil CompanyIn Situ thermal processing of hydrocarbons within a relatively impermeable formation
US691585024 avr. 200212 juil. 2005Shell Oil CompanyIn situ thermal processing of an oil shale formation having permeable and impermeable sections
US691844224 avr. 200219 juil. 2005Shell Oil CompanyIn situ thermal processing of an oil shale formation in a reducing environment
US691844324 avr. 200219 juil. 2005Shell Oil CompanyIn situ thermal processing of an oil shale formation to produce hydrocarbons having a selected carbon number range
US692325724 avr. 20022 août 2005Shell Oil CompanyIn situ thermal processing of an oil shale formation to produce a condensate
US692325812 juin 20032 août 2005Shell Oil CompanyIn situ thermal processsing of a hydrocarbon containing formation to produce a mixture with a selected hydrogen content
US692906724 avr. 200216 août 2005Shell Oil CompanyHeat sources with conductive material for in situ thermal processing of an oil shale formation
US693215524 oct. 200223 août 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation via backproducing through a heater well
US694856224 avr. 200227 sept. 2005Shell Oil CompanyProduction of a blending agent using an in situ thermal process in a relatively permeable formation
US694856324 avr. 200127 sept. 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation with a selected hydrogen content
US695124724 avr. 20024 oct. 2005Shell Oil CompanyIn situ thermal processing of an oil shale formation using horizontal heat sources
US695308724 avr. 200111 oct. 2005Shell Oil CompanyThermal processing of a hydrocarbon containing formation to increase a permeability of the formation
US695976124 avr. 20011 nov. 2005Shell Oil CompanyIn situ thermal processing of a coal formation with a selected ratio of heat sources to production wells
US696430024 avr. 200215 nov. 2005Shell Oil CompanyIn situ thermal recovery from a relatively permeable formation with backproduction through a heater wellbore
US696637224 avr. 200122 nov. 2005Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce oxygen containing formation fluids
US696637424 avr. 200222 nov. 2005Shell Oil CompanyIn situ thermal recovery from a relatively permeable formation using gas to increase mobility
US696912324 oct. 200229 nov. 2005Shell Oil CompanyUpgrading and mining of coal
US697396724 avr. 200113 déc. 2005Shell Oil CompanySitu thermal processing of a coal formation using pressure and/or temperature control
US698154824 avr. 20023 janv. 2006Shell Oil CompanyIn situ thermal recovery from a relatively permeable formation
US699103124 avr. 200131 janv. 2006Shell Oil CompanyIn situ thermal processing of a coal formation to convert a selected total organic carbon content into hydrocarbon products
US699103224 avr. 200231 janv. 2006Shell Oil CompanyIn situ thermal processing of an oil shale formation using a pattern of heat sources
US699103324 avr. 200231 janv. 2006Shell Oil CompanyIn situ thermal processing while controlling pressure in an oil shale formation
US699103624 avr. 200231 janv. 2006Shell Oil CompanyThermal processing of a relatively permeable formation
US699104524 oct. 200231 janv. 2006Shell Oil CompanyForming openings in a hydrocarbon containing formation using magnetic tracking
US699416024 avr. 20017 févr. 2006Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce hydrocarbons having a selected carbon number range
US699416124 avr. 20017 févr. 2006Kevin Albert MaherIn situ thermal processing of a coal formation with a selected moisture content
US6994168 *24 avr. 20017 févr. 2006Scott Lee WellingtonIn situ thermal processing of a hydrocarbon containing formation with a selected hydrogen to carbon ratio
US699416924 avr. 20027 févr. 2006Shell Oil CompanyIn situ thermal processing of an oil shale formation with a selected property
US699725524 avr. 200114 févr. 2006Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation in a reducing environment
US699751824 avr. 200214 févr. 2006Shell Oil CompanyIn situ thermal processing and solution mining of an oil shale formation
US700424724 avr. 200228 févr. 2006Shell Oil CompanyConductor-in-conduit heat sources for in situ thermal processing of an oil shale formation
US700425124 avr. 200228 févr. 2006Shell Oil CompanyIn situ thermal processing and remediation of an oil shale formation
US701115424 oct. 200214 mars 2006Shell Oil CompanyIn situ recovery from a kerogen and liquid hydrocarbon containing formation
US701397224 avr. 200221 mars 2006Shell Oil CompanyIn situ thermal processing of an oil shale formation using a natural distributed combustor
US701766124 avr. 200128 mars 2006Shell Oil CompanyProduction of synthesis gas from a coal formation
US7032660 *24 avr. 200225 avr. 2006Shell Oil CompanyIn situ thermal processing and inhibiting migration of fluids into or out of an in situ oil shale formation
US703658324 sept. 20012 mai 2006Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to increase a porosity of the formation
US704039824 avr. 20029 mai 2006Shell Oil CompanyIn situ thermal processing of a relatively permeable formation in a reducing environment
US704039924 avr. 20029 mai 2006Shell Oil CompanyIn situ thermal processing of an oil shale formation using a controlled heating rate
US704040024 avr. 20029 mai 2006Shell Oil CompanyIn situ thermal processing of a relatively impermeable formation using an open wellbore
US705180724 avr. 200230 mai 2006Shell Oil CompanyIn situ thermal recovery from a relatively permeable formation with quality control
US705180824 oct. 200230 mai 2006Shell Oil CompanySeismic monitoring of in situ conversion in a hydrocarbon containing formation
US705181124 avr. 200230 mai 2006Shell Oil CompanyIn situ thermal processing through an open wellbore in an oil shale formation
US705560024 avr. 20026 juin 2006Shell Oil CompanyIn situ thermal recovery from a relatively permeable formation with controlled production rate
US706314524 oct. 200220 juin 2006Shell Oil CompanyMethods and systems for heating a hydrocarbon containing formation in situ with an opening contacting the earth's surface at two locations
US706625424 oct. 200227 juin 2006Shell Oil CompanyIn situ thermal processing of a tar sands formation
US706625724 oct. 200227 juin 2006Shell Oil CompanyIn situ recovery from lean and rich zones in a hydrocarbon containing formation
US707357824 oct. 200311 juil. 2006Shell Oil CompanyStaged and/or patterned heating during in situ thermal processing of a hydrocarbon containing formation
US707719824 oct. 200218 juil. 2006Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation using barriers
US707719924 oct. 200218 juil. 2006Shell Oil CompanyIn situ thermal processing of an oil reservoir formation
US708646524 oct. 20028 août 2006Shell Oil CompanyIn situ production of a blending agent from a hydrocarbon containing formation
US708646824 avr. 20018 août 2006Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using heat sources positioned within open wellbores
US709001324 oct. 200215 août 2006Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation to produce heated fluids
US709694124 avr. 200129 août 2006Shell Oil CompanyIn situ thermal processing of a coal formation with heat sources located at an edge of a coal layer
US709694224 avr. 200229 août 2006Shell Oil CompanyIn situ thermal processing of a relatively permeable formation while controlling pressure
US709695324 avr. 200129 août 2006Shell Oil CompanyIn situ thermal processing of a coal formation using a movable heating element
US710099424 oct. 20025 sept. 2006Shell Oil CompanyProducing hydrocarbons and non-hydrocarbon containing materials when treating a hydrocarbon containing formation
US710431924 oct. 200212 sept. 2006Shell Oil CompanyIn situ thermal processing of a heavy oil diatomite formation
US711456624 oct. 20023 oct. 2006Shell Oil CompanyIn situ thermal processing of a hydrocarbon containing formation using a natural distributed combustor
US7121341 *24 oct. 200317 oct. 2006Shell Oil CompanyConductor-in-conduit temperature limited heaters
US712134223 avr. 200417 oct. 2006Shell Oil CompanyThermal processes for subsurface formations
US712815324 oct. 200231 oct. 2006Shell Oil CompanyTreatment of a hydrocarbon containing formation after heating
US715617624 oct. 20022 janv. 2007Shell Oil CompanyInstallation and use of removable heaters in a hydrocarbon containing formation
US716561524 oct. 200223 janv. 2007Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation using conductor-in-conduit heat sources with an electrically conductive material in the overburden
US722586631 janv. 20065 juin 2007Shell Oil CompanyIn situ thermal processing of an oil shale formation using a pattern of heat sources
US725288024 juin 20047 août 2007Posa John GTape and wrapping materials with edge-finding feature
US732036422 avr. 200522 janv. 2008Shell Oil CompanyInhibiting reflux in a heated well of an in situ conversion system
US735387222 avr. 20058 avr. 2008Shell Oil CompanyStart-up of temperature limited heaters using direct current (DC)
US735718022 avr. 200515 avr. 2008Shell Oil CompanyInhibiting effects of sloughing in wellbores
US736058817 oct. 200622 avr. 2008Shell Oil CompanyThermal processes for subsurface formations
US737070422 avr. 200513 mai 2008Shell Oil CompanyTriaxial temperature limited heater
US738387722 avr. 200510 juin 2008Shell Oil CompanyTemperature limited heaters with thermally conductive fluid used to heat subsurface formations
US742491522 avr. 200516 sept. 2008Shell Oil CompanyVacuum pumping of conductor-in-conduit heaters
US743107622 avr. 20057 oct. 2008Shell Oil CompanyTemperature limited heaters using modulated DC power
US743503721 avr. 200614 oct. 2008Shell Oil CompanyLow temperature barriers with heat interceptor wells for in situ processes
US746169123 janv. 20079 déc. 2008Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US748127422 avr. 200527 janv. 2009Shell Oil CompanyTemperature limited heaters with relatively constant current
US749066522 avr. 200517 févr. 2009Shell Oil CompanyVariable frequency temperature limited heaters
US750052821 avr. 200610 mars 2009Shell Oil CompanyLow temperature barrier wellbores formed using water flushing
US751000022 avr. 200531 mars 2009Shell Oil CompanyReducing viscosity of oil for production from a hydrocarbon containing formation
US757505221 avr. 200618 août 2009Shell Oil CompanyIn situ conversion process utilizing a closed loop heating system
US764476519 oct. 200712 janv. 2010Shell Oil CompanyHeating tar sands formations while controlling pressure
US767368119 oct. 20079 mars 2010Shell Oil CompanyTreating tar sands formations with karsted zones
US767378620 avr. 20079 mars 2010Shell Oil CompanyWelding shield for coupling heaters
US767731019 oct. 200716 mars 2010Shell Oil CompanyCreating and maintaining a gas cap in tar sands formations
US767731419 oct. 200716 mars 2010Shell Oil CompanyMethod of condensing vaporized water in situ to treat tar sands formations
US768164719 oct. 200723 mars 2010Shell Oil CompanyMethod of producing drive fluid in situ in tar sands formations
US768329620 avr. 200723 mars 2010Shell Oil CompanyAdjusting alloy compositions for selected properties in temperature limited heaters
US770351319 oct. 200727 avr. 2010Shell Oil CompanyWax barrier for use with in situ processes for treating formations
US771717119 oct. 200718 mai 2010Shell Oil CompanyMoving hydrocarbons through portions of tar sands formations with a fluid
US773094519 oct. 20078 juin 2010Shell Oil CompanyUsing geothermal energy to heat a portion of a formation for an in situ heat treatment process
US773094619 oct. 20078 juin 2010Shell Oil CompanyTreating tar sands formations with dolomite
US773094719 oct. 20078 juin 2010Shell Oil CompanyCreating fluid injectivity in tar sands formations
US77359351 juin 200715 juin 2010Shell Oil CompanyIn situ thermal processing of an oil shale formation containing carbonate minerals
US778542720 avr. 200731 août 2010Shell Oil CompanyHigh strength alloys
US779372220 avr. 200714 sept. 2010Shell Oil CompanyNon-ferromagnetic overburden casing
US779822018 avr. 200821 sept. 2010Shell Oil CompanyIn situ heat treatment of a tar sands formation after drive process treatment
US779822131 mai 200721 sept. 2010Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US783113421 avr. 20069 nov. 2010Shell Oil CompanyGrouped exposed metal heaters
US783248418 avr. 200816 nov. 2010Shell Oil CompanyMolten salt as a heat transfer fluid for heating a subsurface formation
US784140119 oct. 200730 nov. 2010Shell Oil CompanyGas injection to inhibit migration during an in situ heat treatment process
US784140818 avr. 200830 nov. 2010Shell Oil CompanyIn situ heat treatment from multiple layers of a tar sands formation
US784142518 avr. 200830 nov. 2010Shell Oil CompanyDrilling subsurface wellbores with cutting structures
US784541119 oct. 20077 déc. 2010Shell Oil CompanyIn situ heat treatment process utilizing a closed loop heating system
US784992218 avr. 200814 déc. 2010Shell Oil CompanyIn situ recovery from residually heated sections in a hydrocarbon containing formation
US786037721 avr. 200628 déc. 2010Shell Oil CompanySubsurface connection methods for subsurface heaters
US786638520 avr. 200711 janv. 2011Shell Oil CompanyPower systems utilizing the heat of produced formation fluid
US786638613 oct. 200811 janv. 2011Shell Oil CompanyIn situ oxidation of subsurface formations
US786638813 oct. 200811 janv. 2011Shell Oil CompanyHigh temperature methods for forming oxidizer fuel
US791235820 avr. 200722 mars 2011Shell Oil CompanyAlternate energy source usage for in situ heat treatment processes
US793108618 avr. 200826 avr. 2011Shell Oil CompanyHeating systems for heating subsurface formations
US794219721 avr. 200617 mai 2011Shell Oil CompanyMethods and systems for producing fluid from an in situ conversion process
US79422034 janv. 201017 mai 2011Shell Oil CompanyThermal processes for subsurface formations
US795045318 avr. 200831 mai 2011Shell Oil CompanyDownhole burner systems and methods for heating subsurface formations
US798686921 avr. 200626 juil. 2011Shell Oil CompanyVarying properties along lengths of temperature limited heaters
US801145113 oct. 20086 sept. 2011Shell Oil CompanyRanging methods for developing wellbores in subsurface formations
US802757121 avr. 200627 sept. 2011Shell Oil CompanyIn situ conversion process systems utilizing wellbores in at least two regions of a formation
US804261018 avr. 200825 oct. 2011Shell Oil CompanyParallel heater system for subsurface formations
US807084021 avr. 20066 déc. 2011Shell Oil CompanyTreatment of gas from an in situ conversion process
US808381320 avr. 200727 déc. 2011Shell Oil CompanyMethods of producing transportation fuel
US811327213 oct. 200814 févr. 2012Shell Oil CompanyThree-phase heaters with common overburden sections for heating subsurface formations
US814666113 oct. 20083 avr. 2012Shell Oil CompanyCryogenic treatment of gas
US814666913 oct. 20083 avr. 2012Shell Oil CompanyMulti-step heater deployment in a subsurface formation
US81518809 déc. 201010 avr. 2012Shell Oil CompanyMethods of making transportation fuel
US815190710 avr. 200910 avr. 2012Shell Oil CompanyDual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations
US816205913 oct. 200824 avr. 2012Shell Oil CompanyInduction heaters used to heat subsurface formations
US816240510 avr. 200924 avr. 2012Shell Oil CompanyUsing tunnels for treating subsurface hydrocarbon containing formations
US817233510 avr. 20098 mai 2012Shell Oil CompanyElectrical current flow between tunnels for use in heating subsurface hydrocarbon containing formations
US817730510 avr. 200915 mai 2012Shell Oil CompanyHeater connections in mines and tunnels for use in treating subsurface hydrocarbon containing formations
US819163028 avr. 20105 juin 2012Shell Oil CompanyCreating fluid injectivity in tar sands formations
US819268226 avr. 20105 juin 2012Shell Oil CompanyHigh strength alloys
US819665813 oct. 200812 juin 2012Shell Oil CompanyIrregular spacing of heat sources for treating hydrocarbon containing formations
US82205399 oct. 200917 juil. 2012Shell Oil CompanyControlling hydrogen pressure in self-regulating nuclear reactors used to treat a subsurface formation
US822416324 oct. 200317 juil. 2012Shell Oil CompanyVariable frequency temperature limited heaters
US822416424 oct. 200317 juil. 2012Shell Oil CompanyInsulated conductor temperature limited heaters
US822416521 avr. 200617 juil. 2012Shell Oil CompanyTemperature limited heater utilizing non-ferromagnetic conductor
US822586621 juil. 201024 juil. 2012Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US823092716 mai 201131 juil. 2012Shell Oil CompanyMethods and systems for producing fluid from an in situ conversion process
US823378229 sept. 201031 juil. 2012Shell Oil CompanyGrouped exposed metal heaters
US823873024 oct. 20037 août 2012Shell Oil CompanyHigh voltage temperature limited heaters
US824077413 oct. 200814 août 2012Shell Oil CompanySolution mining and in situ treatment of nahcolite beds
US82565129 oct. 20094 sept. 2012Shell Oil CompanyMovable heaters for treating subsurface hydrocarbon containing formations
US82571128 oct. 20104 sept. 2012Shell Oil CompanyPress-fit coupling joint for joining insulated conductors
US82618329 oct. 200911 sept. 2012Shell Oil CompanyHeating subsurface formations with fluids
US82671709 oct. 200918 sept. 2012Shell Oil CompanyOffset barrier wells in subsurface formations
US82671859 oct. 200918 sept. 2012Shell Oil CompanyCirculated heated transfer fluid systems used to treat a subsurface formation
US827245513 oct. 200825 sept. 2012Shell Oil CompanyMethods for forming wellbores in heated formations
US827666113 oct. 20082 oct. 2012Shell Oil CompanyHeating subsurface formations by oxidizing fuel on a fuel carrier
US82818619 oct. 20099 oct. 2012Shell Oil CompanyCirculated heated transfer fluid heating of subsurface hydrocarbon formations
US832768118 avr. 200811 déc. 2012Shell Oil CompanyWellbore manufacturing processes for in situ heat treatment processes
US83279329 avr. 201011 déc. 2012Shell Oil CompanyRecovering energy from a subsurface formation
US83533479 oct. 200915 janv. 2013Shell Oil CompanyDeployment of insulated conductors for treating subsurface formations
US835562322 avr. 200515 janv. 2013Shell Oil CompanyTemperature limited heaters with high power factors
US83569358 oct. 201022 janv. 2013Shell Oil CompanyMethods for assessing a temperature in a subsurface formation
US838181518 avr. 200826 févr. 2013Shell Oil CompanyProduction from multiple zones of a tar sands formation
US84345559 avr. 20107 mai 2013Shell Oil CompanyIrregular pattern treatment of a subsurface formation
US84487079 avr. 201028 mai 2013Shell Oil CompanyNon-conducting heater casings
US845935918 avr. 200811 juin 2013Shell Oil CompanyTreating nahcolite containing formations and saline zones
US848525211 juil. 201216 juil. 2013Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US84852568 avr. 201116 juil. 2013Shell Oil CompanyVariable thickness insulated conductors
US8485847 *30 août 201216 juil. 2013Shell Oil CompanyPress-fit coupling joint for joining insulated conductors
US85021208 avr. 20116 août 2013Shell Oil CompanyInsulating blocks and methods for installation in insulated conductor heaters
US853649713 oct. 200817 sept. 2013Shell Oil CompanyMethods for forming long subsurface heaters
US855597131 mai 201215 oct. 2013Shell Oil CompanyTreating tar sands formations with dolomite
US856207825 nov. 200922 oct. 2013Shell Oil CompanyHydrocarbon production from mines and tunnels used in treating subsurface hydrocarbon containing formations
US857903117 mai 201112 nov. 2013Shell Oil CompanyThermal processes for subsurface formations
US85868667 oct. 201119 nov. 2013Shell Oil CompanyHydroformed splice for insulated conductors
US85868677 oct. 201119 nov. 2013Shell Oil CompanyEnd termination for three-phase insulated conductors
US860609120 oct. 200610 déc. 2013Shell Oil CompanySubsurface heaters with low sulfidation rates
US860824926 avr. 201017 déc. 2013Shell Oil CompanyIn situ thermal processing of an oil shale formation
US86278878 déc. 200814 janv. 2014Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US86318668 avr. 201121 janv. 2014Shell Oil CompanyLeak detection in circulated fluid systems for heating subsurface formations
US863632325 nov. 200928 janv. 2014Shell Oil CompanyMines and tunnels for use in treating subsurface hydrocarbon containing formations
US866217518 avr. 20084 mars 2014Shell Oil CompanyVarying properties of in situ heat treatment of a tar sands formation based on assessed viscosities
US87017688 avr. 201122 avr. 2014Shell Oil CompanyMethods for treating hydrocarbon formations
US87017698 avr. 201122 avr. 2014Shell Oil CompanyMethods for treating hydrocarbon formations based on geology
US87329467 oct. 201127 mai 2014Shell Oil CompanyMechanical compaction of insulator for insulated conductor splices
US87398748 avr. 20113 juin 2014Shell Oil CompanyMethods for heating with slots in hydrocarbon formations
US875290410 avr. 200917 juin 2014Shell Oil CompanyHeated fluid flow in mines and tunnels used in heating subsurface hydrocarbon containing formations
US878958612 juil. 201329 juil. 2014Shell Oil CompanyIn situ recovery from a hydrocarbon containing formation
US879139618 avr. 200829 juil. 2014Shell Oil CompanyFloating insulated conductors for heating subsurface formations
US88162038 oct. 201026 août 2014Shell Oil CompanyCompacted coupling joint for coupling insulated conductors
US88204068 avr. 20112 sept. 2014Shell Oil CompanyElectrodes for electrical current flow heating of subsurface formations with conductive material in wellbore
US88334538 avr. 201116 sept. 2014Shell Oil CompanyElectrodes for electrical current flow heating of subsurface formations with tapered copper thickness
US88511709 avr. 20107 oct. 2014Shell Oil CompanyHeater assisted fluid treatment of a subsurface formation
US88570517 oct. 201114 oct. 2014Shell Oil CompanySystem and method for coupling lead-in conductor to insulated conductor
US885750624 mai 201314 oct. 2014Shell Oil CompanyAlternate energy source usage methods for in situ heat treatment processes
US88599426 août 201314 oct. 2014Shell Oil CompanyInsulating blocks and methods for installation in insulated conductor heaters
US88818069 oct. 200911 nov. 2014Shell Oil CompanySystems and methods for treating a subsurface formation with electrical conductors
US89392078 avr. 201127 janv. 2015Shell Oil CompanyInsulated conductor heaters with semiconductor layers
US89436867 oct. 20113 févr. 2015Shell Oil CompanyCompaction of electrical insulation for joining insulated conductors
US89672598 avr. 20113 mars 2015Shell Oil CompanyHelical winding of insulated conductor heaters for installation
US90163706 avr. 201228 avr. 2015Shell Oil CompanyPartial solution mining of hydrocarbon containing layers prior to in situ heat treatment
US902210921 janv. 20145 mai 2015Shell Oil CompanyLeak detection in circulated fluid systems for heating subsurface formations
US90221189 oct. 20095 mai 2015Shell Oil CompanyDouble insulated heaters for treating subsurface formations
US90330428 avr. 201119 mai 2015Shell Oil CompanyForming bitumen barriers in subsurface hydrocarbon formations
US90486536 avr. 20122 juin 2015Shell Oil CompanySystems for joining insulated conductors
US90518299 oct. 20099 juin 2015Shell Oil CompanyPerforated electrical conductors for treating subsurface formations
US90804094 oct. 201214 juil. 2015Shell Oil CompanyIntegral splice for insulated conductors
US90809174 oct. 201214 juil. 2015Shell Oil CompanySystem and methods for using dielectric properties of an insulated conductor in a subsurface formation to assess properties of the insulated conductor
US91275238 avr. 20118 sept. 2015Shell Oil CompanyBarrier methods for use in subsurface hydrocarbon formations
US91275388 avr. 20118 sept. 2015Shell Oil CompanyMethodologies for treatment of hydrocarbon formations using staged pyrolyzation
US91297289 oct. 20098 sept. 2015Shell Oil CompanySystems and methods of forming subsurface wellbores
US918178018 avr. 200810 nov. 2015Shell Oil CompanyControlling and assessing pressure conditions during treatment of tar sands formations
US92263414 oct. 201229 déc. 2015Shell Oil CompanyForming insulated conductors using a final reduction step after heat treating
US93097554 oct. 201212 avr. 2016Shell Oil CompanyThermal expansion accommodation for circulated fluid systems used to heat subsurface formations
US933755018 nov. 201310 mai 2016Shell Oil CompanyEnd termination for three-phase insulated conductors
US93999054 mai 201526 juil. 2016Shell Oil CompanyLeak detection in circulated fluid systems for heating subsurface formations
US94668968 oct. 201011 oct. 2016Shell Oil CompanyParallelogram coupling joint for coupling insulated conductors
US952832216 juin 201427 déc. 2016Shell Oil CompanyDual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations
US975541511 avr. 20165 sept. 2017Shell Oil CompanyEnd termination for three-phase insulated conductors
US20030079877 *24 avr. 20021 mai 2003Wellington Scott LeeIn situ thermal processing of a relatively impermeable formation in a reducing environment
US20030080604 *24 avr. 20021 mai 2003Vinegar Harold J.In situ thermal processing and inhibiting migration of fluids into or out of an in situ oil shale formation
US20030098149 *24 avr. 200229 mai 2003Wellington Scott LeeIn situ thermal recovery from a relatively permeable formation using gas to increase mobility
US20030098605 *24 avr. 200229 mai 2003Vinegar Harold J.In situ thermal recovery from a relatively permeable formation
US20030102126 *24 avr. 20025 juin 2003Sumnu-Dindoruk Meliha DenizIn situ thermal recovery from a relatively permeable formation with controlled production rate
US20030111223 *24 avr. 200219 juin 2003Rouffignac Eric Pierre DeIn situ thermal processing of an oil shale formation using horizontal heat sources
US20030116315 *24 avr. 200226 juin 2003Wellington Scott LeeIn situ thermal processing of a relatively permeable formation
US20030131993 *24 avr. 200217 juil. 2003Etuan ZhangIn situ thermal processing of an oil shale formation with a selected property
US20030131995 *24 avr. 200217 juil. 2003De Rouffignac Eric PierreIn situ thermal processing of a relatively impermeable formation to increase permeability of the formation
US20030131996 *24 avr. 200217 juil. 2003Vinegar Harold J.In situ thermal processing of an oil shale formation having permeable and impermeable sections
US20030136558 *24 avr. 200224 juil. 2003Wellington Scott LeeIn situ thermal processing of an oil shale formation to produce a desired product
US20030136559 *24 avr. 200224 juil. 2003Wellington Scott LeeIn situ thermal processing while controlling pressure in an oil shale formation
US20030141066 *24 avr. 200231 juil. 2003Karanikas John MichaelIn situ thermal processing of an oil shale formation while inhibiting coking
US20030141067 *24 avr. 200231 juil. 2003Rouffignac Eric Pierre DeIn situ thermal processing of an oil shale formation to increase permeability of the formation
US20030142964 *24 avr. 200231 juil. 2003Wellington Scott LeeIn situ thermal processing of an oil shale formation using a controlled heating rate
US20030146002 *24 avr. 20027 août 2003Vinegar Harold J.Removable heat sources for in situ thermal processing of an oil shale formation
US20030164239 *24 avr. 20024 sept. 2003Wellington Scott LeeIn situ thermal processing of an oil shale formation in a reducing environment
US20030173081 *24 oct. 200218 sept. 2003Vinegar Harold J.In situ thermal processing of an oil reservoir formation
US20030173085 *24 oct. 200218 sept. 2003Vinegar Harold J.Upgrading and mining of coal
US20030201098 *24 oct. 200230 oct. 2003Karanikas John MichaelIn situ recovery from a hydrocarbon containing formation using one or more simulations
US20040040715 *24 oct. 20024 mars 2004Wellington Scott LeeIn situ production of a blending agent from a hydrocarbon containing formation
US20040177966 *24 oct. 200316 sept. 2004Vinegar Harold J.Conductor-in-conduit temperature limited heaters
US20040211554 *24 avr. 200228 oct. 2004Vinegar Harold J.Heat sources with conductive material for in situ thermal processing of an oil shale formation
US20040211557 *24 avr. 200228 oct. 2004Cole Anthony ThomasConductor-in-conduit heat sources for in situ thermal processing of an oil shale formation
US20040234732 *24 juin 200425 nov. 2004Posa John G.Tape and wrapping materials with edge-finding feature
US20050092483 *24 oct. 20025 mai 2005Vinegar Harold J.In situ thermal processing of a hydrocarbon containing formation using a natural distributed combustor
US20070045265 *21 avr. 20061 mars 2007Mckinzie Billy J IiLow temperature barriers with heat interceptor wells for in situ processes
US20070095536 *20 oct. 20063 mai 2007Vinegar Harold JCogeneration systems and processes for treating hydrocarbon containing formations
US20070125533 *20 oct. 20067 juin 2007Minderhoud Johannes KMethods of hydrotreating a liquid stream to remove clogging compounds
US20070127897 *20 oct. 20067 juin 2007John Randy CSubsurface heaters with low sulfidation rates
US20070131419 *20 oct. 200614 juin 2007Maria Roes Augustinus WMethods of producing alkylated hydrocarbons from an in situ heat treatment process liquid
US20070131420 *20 oct. 200614 juin 2007Weijian MoMethods of cracking a crude product to produce additional crude products
US20070221377 *20 oct. 200627 sept. 2007Vinegar Harold JSolution mining systems and methods for treating hydrocarbon containing formations
US20080035346 *20 avr. 200714 févr. 2008Vijay NairMethods of producing transportation fuel
US20080035348 *20 avr. 200714 févr. 2008Vitek John MTemperature limited heaters using phase transformation of ferromagnetic material
US20080035705 *20 avr. 200714 févr. 2008Menotti James LWelding shield for coupling heaters
US20080038144 *20 avr. 200714 févr. 2008Maziasz Phillip JHigh strength alloys
US20080107577 *20 oct. 20068 mai 2008Vinegar Harold JVarying heating in dawsonite zones in hydrocarbon containing formations
US20080128134 *19 oct. 20075 juin 2008Ramesh Raju MudunuriProducing drive fluid in situ in tar sands formations
US20080135244 *19 oct. 200712 juin 2008David Scott MillerHeating hydrocarbon containing formations in a line drive staged process
US20080135253 *19 oct. 200712 juin 2008Vinegar Harold JTreating tar sands formations with karsted zones
US20080135254 *19 oct. 200712 juin 2008Vinegar Harold JIn situ heat treatment process utilizing a closed loop heating system
US20080142216 *19 oct. 200719 juin 2008Vinegar Harold JTreating tar sands formations with dolomite
US20080142217 *19 oct. 200719 juin 2008Roelof PietersonUsing geothermal energy to heat a portion of a formation for an in situ heat treatment process
US20080173442 *20 avr. 200724 juil. 2008Vinegar Harold JSulfur barrier for use with in situ processes for treating formations
US20080173444 *20 avr. 200724 juil. 2008Francis Marion StoneAlternate energy source usage for in situ heat treatment processes
US20080173450 *20 avr. 200724 juil. 2008Bernard GoldbergTime sequenced heating of multiple layers in a hydrocarbon containing formation
US20080174115 *20 avr. 200724 juil. 2008Gene Richard LambirthPower systems utilizing the heat of produced formation fluid
US20080185147 *19 oct. 20077 août 2008Vinegar Harold JWax barrier for use with in situ processes for treating formations
US20080217003 *19 oct. 200711 sept. 2008Myron Ira KuhlmanGas injection to inhibit migration during an in situ heat treatment process
US20080217004 *19 oct. 200711 sept. 2008De Rouffignac Eric PierreHeating hydrocarbon containing formations in a checkerboard pattern staged process
US20080217015 *19 oct. 200711 sept. 2008Vinegar Harold JHeating hydrocarbon containing formations in a spiral startup staged sequence
US20080277113 *19 oct. 200713 nov. 2008George Leo StegemeierHeating tar sands formations while controlling pressure
US20090014180 *19 oct. 200715 janv. 2009George Leo StegemeierMoving hydrocarbons through portions of tar sands formations with a fluid
US20090014181 *19 oct. 200715 janv. 2009Vinegar Harold JCreating and maintaining a gas cap in tar sands formations
US20090071652 *18 avr. 200819 mars 2009Vinegar Harold JIn situ heat treatment from multiple layers of a tar sands formation
US20090078461 *18 avr. 200826 mars 2009Arthur James MansureDrilling subsurface wellbores with cutting structures
US20090084547 *18 avr. 20082 avr. 2009Walter Farman FarmayanDownhole burner systems and methods for heating subsurface formations
US20090090509 *18 avr. 20089 avr. 2009Vinegar Harold JIn situ recovery from residually heated sections in a hydrocarbon containing formation
US20090095476 *18 avr. 200816 avr. 2009Scott Vinh NguyenMolten salt as a heat transfer fluid for heating a subsurface formation
US20090095477 *18 avr. 200816 avr. 2009Scott Vinh NguyenHeating systems for heating subsurface formations
US20090095479 *18 avr. 200816 avr. 2009John Michael KaranikasProduction from multiple zones of a tar sands formation
US20090095480 *18 avr. 200816 avr. 2009Vinegar Harold JIn situ heat treatment of a tar sands formation after drive process treatment
US20090126929 *18 avr. 200821 mai 2009Vinegar Harold JTreating nahcolite containing formations and saline zones
US20090189617 *13 oct. 200830 juil. 2009David BurnsContinuous subsurface heater temperature measurement
US20090194269 *13 oct. 20086 août 2009Vinegar Harold JThree-phase heaters with common overburden sections for heating subsurface formations
US20090194282 *13 oct. 20086 août 2009Gary Lee BeerIn situ oxidation of subsurface formations
US20090194329 *13 oct. 20086 août 2009Rosalvina Ramona GuimeransMethods for forming wellbores in heated formations
US20090194524 *13 oct. 20086 août 2009Dong Sub KimMethods for forming long subsurface heaters
US20090200025 *13 oct. 200813 août 2009Jose Luis BravoHigh temperature methods for forming oxidizer fuel
US20090200031 *13 oct. 200813 août 2009David Scott MillerIrregular spacing of heat sources for treating hydrocarbon containing formations
US20090200854 *13 oct. 200813 août 2009Vinegar Harold JSolution mining and in situ treatment of nahcolite beds
US20090260823 *10 avr. 200922 oct. 2009Robert George Prince-WrightMines and tunnels for use in treating subsurface hydrocarbon containing formations
US20090260824 *10 avr. 200922 oct. 2009David Booth BurnsHydrocarbon production from mines and tunnels used in treating subsurface hydrocarbon containing formations
US20090272533 *10 avr. 20095 nov. 2009David Booth BurnsHeated fluid flow in mines and tunnels used in heating subsurface hydrocarbon containing formations
US20090272535 *10 avr. 20095 nov. 2009David Booth BurnsUsing tunnels for treating subsurface hydrocarbon containing formations
US20090272578 *10 avr. 20095 nov. 2009Macdonald Duncan CharlesDual motor systems and non-rotating sensors for use in developing wellbores in subsurface formations
US20100089586 *9 oct. 200915 avr. 2010John Andrew StaneckiMovable heaters for treating subsurface hydrocarbon containing formations
US20100096137 *9 oct. 200922 avr. 2010Scott Vinh NguyenCirculated heated transfer fluid heating of subsurface hydrocarbon formations
US20100101783 *9 oct. 200929 avr. 2010Vinegar Harold JUsing self-regulating nuclear reactors in treating a subsurface formation
US20100101784 *9 oct. 200929 avr. 2010Vinegar Harold JControlling hydrogen pressure in self-regulating nuclear reactors used to treat a subsurface formation
US20100108310 *9 oct. 20096 mai 2010Thomas David FowlerOffset barrier wells in subsurface formations
US20100108379 *9 oct. 20096 mai 2010David Alston EdburySystems and methods of forming subsurface wellbores
US20100258291 *9 avr. 201014 oct. 2010Everett De St Remey EdwardHeated liners for treating subsurface hydrocarbon containing formations
US20110124223 *8 oct. 201026 mai 2011David Jon TilleyPress-fit coupling joint for joining insulated conductors
US20110124228 *8 oct. 201026 mai 2011John Matthew ColesCompacted coupling joint for coupling insulated conductors
US20110132661 *8 oct. 20109 juin 2011Patrick Silas HarmasonParallelogram coupling joint for coupling insulated conductors
US20110134958 *8 oct. 20109 juin 2011Dhruv AroraMethods for assessing a temperature in a subsurface formation
USRE35696 *28 sept. 199523 déc. 1997Shell Oil CompanyHeat injection process
Classifications
Classification aux États-Unis166/60, 392/304
Classification internationaleE21B36/00, E21B36/04
Classification coopérativeE21B36/04
Classification européenneE21B36/04