US3765483A - Method and apparatus for producing dual zone oil and gas wells - Google Patents

Method and apparatus for producing dual zone oil and gas wells Download PDF

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US3765483A
US3765483A US00170166A US3765483DA US3765483A US 3765483 A US3765483 A US 3765483A US 00170166 A US00170166 A US 00170166A US 3765483D A US3765483D A US 3765483DA US 3765483 A US3765483 A US 3765483A
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tubular string
zone
port
passage
pump
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N Vencil
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Dresser Industries Inc
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
    • E21B43/121—Lifting well fluids
    • E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/14—Obtaining from a multiple-zone well

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  • ABSTRACT Two oil and gas zones are produced by allowing production from each zone to drain to separate chambers where production from each zone is pumped by a separate pump; the outputs from the separate pumps are commingled and conducted to the earths surface. A separate gas vent is provided for each zone to the earths surface.
  • the field of the invention relates to dual zone wells which require both of the zones to be artificially lifted.
  • This method and apparatus is suitable for wells producing oil, saltwater, fresh water or other liquid with or without natural gas in one or more of the zones.
  • This prior art device discloses apparatus for commingling multiple zone well production, the apparatus being arranged in the well so that the upper zone production travels down the casing and allows gas entrained in the liquid to break out and pass to the surface. No provision is made, however, for separate handling of the lower zone gas.
  • the device does not provide a check valve to prevent high pressure in the lower zone from passing through the tool and into the upper zone where such liquid may not be recoverable.
  • the pump intake is positioned above the packer which is not necessarily a desirable position in the case of a low pressure, low production, lower zone.
  • a further prior art device shown in U.S. Pat. No.
  • Re 26,319 discloses a flow control device for producing multiple zone wells which have sufficient drive in the producing zones to cause the fluid to flow into the well bore where it is metered through predetermined orifices and commingled at a point whereby gas from a higher pressure zone can assist in lifting production from a lower pressure zone.
  • An additional prior art device shown in U.S. Pat. No. 3,509,941, discloses a confluent producton apparatus wherein one zone or the other or both zones can be produced. Check valves are provided in the passages from each zone so that flow is prevented between the zones but no provision is made for separate handling of gas from the lower zone nor is the position of the pump intake desirable because the pump intake is above the packer between zones and is, therefore, above the lower zone.
  • FIGURE is a view partially in elevation and partially in section of a well bore with well casing and apparatus according to this invention which may be used to produce a dual zone well.
  • casing 10 is shown in a well bore through two producing horizons l2 and 14.
  • Perforations 16 and 18 in the upper and lower producing zones, respectively, allow production from these zones to flow into the casing 10.
  • a packet 20 is sealingly engaged with the casing 10 between the perforations l6 and 18 to isolate the producing zones from each other.
  • Gas from the upper zone 12 flows into the casing 10 through perforation 16 and is designated UG.
  • Gas may be dissolved and/or entrained in the upper zone liquid production designated U.
  • Some of the upper zone gas UG can break out of the liquid U and flow upward through the casing 10 to be gathered from outlet 22 in the casing at the top of the well bore.
  • the volume of UG gas passing through this outlet is measured with gas meter 23 and then used for gas lift purposes, sold into a pipeline, or used for other purposes.
  • Production gas LG from lower zone 14 flowing into casing 10 through perforations 18 may flow upward into a seal nipple 24 sealingly engaged to packer 20 and tubing string 28 which extends to the top of the Well bore where it may be measured by gas meter 29 and disposed of in one of the ways mentioned for the UG gas.
  • Liquid production U from the upper zone can gravitate or flow downward through annulus 30 to check valve 32 which is incorporated in the flow path for liquid U permitting flow into chamber 34 from the upper zone but preventing back flow from chamber 34 to annulus 30.
  • Lower zone liquid production L flows into casing 10 through perforations l8 and flows through annulus 36 through intake port 42 into pump 38.
  • Check valve 40 in pump 38 prevents back flow into liquid to lower zone 14.
  • Lower production L then flows into lower pump 38 which lifts lower production L and discharges the liquid through check valve 44 which acts as a discharge port from pump 38.
  • Liquid L then flows up through the lower portion 46 of tubing string 48, and then through a side port 49 into a passageway 50 in body 52.
  • Lower production L then continues upward and passes through port 54 into the upper portion of tubing string 48 through which it is conducted to the top of the well bore and is produced into a flow line connection 56.
  • the upper zone pump 58 receives upper zone production through check valve 32 and chamber 34. The liquid then flows up into pump 58 where it is lifted and discharged through check valve 60.
  • Upper zone production U flows upward and out discharge port 62 inside tubing string 48 where upper zone production U and lower zone production L are commingled and conducted to the surface to be carried away in flowline connection 56.
  • the upper zone pump 58 and lower zone pump 38 are operated by a conventional sucker rod string 64 which is reciprocated by a pumping jack (not shown) or other apparatus well known to those of ordinary skill in the art.
  • Plunger pumps may be of the traveling plunger variety with a stationary barrel or may be of a traveling barrel variety with a stationary plunger according to the needs of a particular installation.
  • the sole FIGURE illustrates the upper pump of the stationary barrel and traveling plunger variety.
  • Upper pump 58 has a stationary barrel 66 which is anchored to a conventional seating nipple 68 which is well known to those of ordinary skill in the art.
  • the seating nipple 68 anchors the stationary portion of the upper pump and forms a seal with body 52 in the main passageway 70, a portion of which forms chamber 34.
  • a polish rod 72 connects the movable portions of the upper and lower pumps and provides for reciprocating the movable portion of lower pump 38 along with the reciprocation of the movable portion of upper pump 58.
  • a lower seal means 74 is provided in the passage 70 in body 52. The seal means 74 sealingly engages the lower portion of passage 70 below the side port 76 which connects check valve 32 to chamber 34 and provides a moving seal with polish rod 72 to isolate passage 70 between side port 76 and lower port 49.
  • Upper seating nipple 68 seals side port 76 from upper port 54 to provide a seal between intake side of the upper pump 58 from the discharge port 62 of the upper pump 58.
  • collet 78 is connected to lower seal means 74 and mechanically engages shoulder 80 to provide a mechanical lock to hold lower seal means 74 in position while polish rod 72 reciprocates therein.
  • a tubular release mechanism 82 is attached to lower end of polish rod 72 to collapse collet 78 to a diameter smaller than the diameter of shoulder 80 when the dual zone pump assembly is lifted by sucker rod string 64 for withdrawal from the tubing string, providing for complete recovery of the dual zone pump assembly for service simply by withdrawing the assembly on the sucker rods when service is required.
  • a lower landing nipple is provided in the tubular string 46 below the body 52 to seal the stationary portion of the lower pump 38 to the tubular string 46.
  • a dual zone producing apparatus which provides a dual zone pump with separate pump elements for each zone is adaptable for a well which has differing producing zone pressures.
  • a chamber is disclosed for receiving production which drains from the multiple zones. A single pump then lifts the fluid from this chamber in which production from the various zones is commingled.
  • Apparatus according to the instant invention provides for a separate pump for each zone so that zones of different pressures may be pumped, each zone with its own pump, providing commingling of the pumped fluids so that the higher pressure in one zone will not affect the drainage and production from the lower pressure zone.
  • Commingling the produced liquids provides a completion which can be installed at much lower cost than a completion which provides for separate production of each zone to the surface.
  • Provision of the parallel tubing string 28 with the second passage through packer 20 is an optional feature which may be incorporated if there is sufficient gas produced from a lower zone to require a separate vent for the lower zone gas LG.
  • a well casing passing through upper and lower producing zones in a well bore, said casing having upper and lower openings through which production from said upper and lower zones can flow, respectively, into the well casing;
  • barrier means in said casing between said upper and lower openings, said barrier means having a longitudinal passage
  • tubular string having upper and lower sections, said tubular string extending from the top of the well bore to said barrier means and communicating with and secured to said longitudinal passage;
  • body means interposed between said upper and lower sections of said tubular string and located above said barrier means, said body means having a first longitudinal passageway and a side port extending from said first longitudinal passageway to the exterior of said body, said body means further having a second longitudinal passageway, said second longitudinal passageway having an upper port communicating with the upper section of said tubular string, said second passageway having a lower port communicating with the lower section of said tubular string which communicates with said second longitudinal passage and said lower zone;
  • an upper plunger pump in said tubular string having a movable portion and a stationary portion
  • a lower plunger pump located in said tubular string below said upper pump and having a movable portion and a stationary portion;
  • upper seal means for sealing the stationary portion of said upper plunger pump to said body between said side port and said upper port;
  • lower landing nipple means in said tubular string located below said body for sealing the stationary portion of said lower pump to said tubular string.
  • Apparatus according to claim 1 further comprisa second passage in said barrier means
  • a second tubular string communicating with said second passage in said barrier means and extending to the top of the well bore for conducting gas from the lower zone to the top of the well bore.
  • a body having at least two longitudinal passages, said first passage aligned and connected to said tubular string, said body interposed between said upper and lower sections of the tubular string intermediate the packer and the top of the well bore, said body having a side port connecting said first passage to the exterior of said body, said second longitudinal passage having an upper port communicating with said upper section of said tubing string, said second passage having a lower port communicating with the lower section of said tubular string and the zone beneath said packer;
  • a check valve controlling flow in said side port, allowing upper zone production to flow into said first passage and preventing reverse flow;
  • an upper plunger pump in said tubular string having a stationary portion, a movable portion, an intake port and a discharge port;
  • a lower plunger pump in said tubular string having a stationary portion, a movable portion, an intake port and a discharge port;
  • upper seating nipple means sealing and connecting the stationary portion of said upper plunger pump to said body between said side port and said upper port;
  • said upper plunger pump having said intake port communicating with said first passage above said upper seating nipple means and having said discharge port communicating with the tubular string above said upper seating nipple means;
  • seal means for sealing said polish rod to the lower rod of said first longitudinal passage between said side port and said upper port;
  • lower seating nipple means sealing and connecting the stationary portion of said lower plunger pump to the tubular string
  • said lower plunger pump having said intake port communicating with the tubular string below said lower seating nipple means, and having said discharge port communicating with the tubular string above said lower seating nipple means and below said body.

Abstract

Two oil and gas zones are produced by allowing production from each zone to drain to separate chambers where production from each zone is pumped by a separate pump; the outputs from the separate pumps are commingled and conducted to the earth''s surface. A separate gas vent is provided for each zone to the earth''s surface.

Description

United States Patent 1191 Vencil METHOD AND APPARATUS FOR PRODUCING DUAL ZONE OIL AND GAS WELLS [75] Inventor: Naylan N. Vencil, Odessa, Tex.
[73] Assignee: Dresser Industries Inc., Dallas, Tex.
[22] Filed: Aug. 9, 1971 21 Appl. No.2 170,166
[52] US. Cl. 166/265, 166/54.l, 166/313 [51] Int. Cl. E2lb 43/00 [58] Field of Search 166/54.l, 265, 313
[56] References Cited UNITED STATES PATENTS 2,910,002 10/1959 Morgan ..166/54.1
29: p GAS LG MMETER Hodges 166/313 X Morris et al. 166/313 UX Primary ExaminerMarvin A. Champion Assistant Examiner-Jack E. Ebel Attorney-Robert W. Mayer et a1.
[57] ABSTRACT Two oil and gas zones are produced by allowing production from each zone to drain to separate chambers where production from each zone is pumped by a separate pump; the outputs from the separate pumps are commingled and conducted to the earths surface. A separate gas vent is provided for each zone to the earths surface.
3 Claims, 1 Drawing Figure PATENTEU OCT 1 5 I973 INVENTQRI NAYLAN N. VENCI L AGENT METHOD AND APPARATUS FOR PRODUCING DUAL ZONE OIL AND GAS WELLS CROSS REFERENCES TO RELATED APPLICATIONS This application is related to my copending application Method and Apparatus for Producing Multiple Zone Oil and Gas Wells," Ser. No. 163,795 filed July 19, 1972, and copending application Method and Apparatus for Producing Multiple Zone Oil and Gas Wells, Ser. No. 163,855, filed July 19, 1972 by Nijah Frank Myers.
BACKGROUND OF THE INVENTION The field of the invention relates to dual zone wells which require both of the zones to be artificially lifted. This method and apparatus is suitable for wells producing oil, saltwater, fresh water or other liquid with or without natural gas in one or more of the zones.
A prior art device is shown in U.S. Pat. No. 2,618,339. This prior art device discloses apparatus for commingling multiple zone well production, the apparatus being arranged in the well so that the upper zone production travels down the casing and allows gas entrained in the liquid to break out and pass to the surface. No provision is made, however, for separate handling of the lower zone gas. The device does not provide a check valve to prevent high pressure in the lower zone from passing through the tool and into the upper zone where such liquid may not be recoverable. Also, the pump intake is positioned above the packer which is not necessarily a desirable position in the case of a low pressure, low production, lower zone. A further prior art device, shown in U.S. Pat. No. Re 26,319, discloses a flow control device for producing multiple zone wells which have sufficient drive in the producing zones to cause the fluid to flow into the well bore where it is metered through predetermined orifices and commingled at a point whereby gas from a higher pressure zone can assist in lifting production from a lower pressure zone. An additional prior art device, shown in U.S. Pat. No. 3,509,941, discloses a confluent producton apparatus wherein one zone or the other or both zones can be produced. Check valves are provided in the passages from each zone so that flow is prevented between the zones but no provision is made for separate handling of gas from the lower zone nor is the position of the pump intake desirable because the pump intake is above the packer between zones and is, therefore, above the lower zone. An additional prior art device, shown in U.S. Pat. No. 3,559,740, discloses method and apparatus for use with hydraulic pump and multiple completion well bores. This patent discloses a separate vent for the lower zone gas. It also discloses various selector heads which provide production from either one or both of the zones and provides for chokes to meter production from the zones. However, none of the prior art devices show or disclose apparatus which adequately drains production from zones in a multiple zone well, wherein one or more zones have such low pressure that production is reduced in total or in part by reason of hydrostatic pressure from another zone, or in a column of the liquid in the well bore being lifted from the zone to a pump intake.
It is a primary object of this invention to provide a dual zone producing arrangement which provides for individual pumping of a high pressure and a low pressure zone, and then for the commingling of the pumped liquids.
It is a further object of this invention to provide a dual zone producing arrangement which provides for individual lifting of each zone.
It is a further object of this invention to provide a dual zone production apparatus which provides separate venting of the gas from each zone.
It is a further object of this invention to provide a dual zone production apparatus which provides for separate measurement of the gas from each zone.
It is a further object of this invention to provide a multiple zone production apparatus which conserves hydrocarbons and prevents loss of fluid or gas from a high pressure zone into a lower pressure zone in the same well bore.
SUMMARY OF THE INVENTION These and other objects of this invention are fulfilled, broadly, with a dual zone producing apparatus and method which provides a separate pump for each zone and which then provides for the commingling of the fluids from the production zones at the discharge of the pumps.
BRIEF DESCRIPTION OF THE DRAWING The sole FIGURE is a view partially in elevation and partially in section of a well bore with well casing and apparatus according to this invention which may be used to produce a dual zone well. A
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawing of the preferred embodiment, casing 10 is shown in a well bore through two producing horizons l2 and 14. Perforations 16 and 18 in the upper and lower producing zones, respectively, allow production from these zones to flow into the casing 10. A packet 20 is sealingly engaged with the casing 10 between the perforations l6 and 18 to isolate the producing zones from each other. Gas from the upper zone 12 flows into the casing 10 through perforation 16 and is designated UG. Gas may be dissolved and/or entrained in the upper zone liquid production designated U. Some of the upper zone gas UG can break out of the liquid U and flow upward through the casing 10 to be gathered from outlet 22 in the casing at the top of the well bore. The volume of UG gas passing through this outlet is measured with gas meter 23 and then used for gas lift purposes, sold into a pipeline, or used for other purposes. Production gas LG from lower zone 14 flowing into casing 10 through perforations 18 may flow upward into a seal nipple 24 sealingly engaged to packer 20 and tubing string 28 which extends to the top of the Well bore where it may be measured by gas meter 29 and disposed of in one of the ways mentioned for the UG gas. Liquid production U from the upper zone can gravitate or flow downward through annulus 30 to check valve 32 which is incorporated in the flow path for liquid U permitting flow into chamber 34 from the upper zone but preventing back flow from chamber 34 to annulus 30. Lower zone liquid production L flows into casing 10 through perforations l8 and flows through annulus 36 through intake port 42 into pump 38. Check valve 40 in pump 38 prevents back flow into liquid to lower zone 14.
Lower production L then flows into lower pump 38 which lifts lower production L and discharges the liquid through check valve 44 which acts as a discharge port from pump 38. Liquid L then flows up through the lower portion 46 of tubing string 48, and then through a side port 49 into a passageway 50 in body 52. Lower production L then continues upward and passes through port 54 into the upper portion of tubing string 48 through which it is conducted to the top of the well bore and is produced into a flow line connection 56. The upper zone pump 58 receives upper zone production through check valve 32 and chamber 34. The liquid then flows up into pump 58 where it is lifted and discharged through check valve 60. Upper zone production U flows upward and out discharge port 62 inside tubing string 48 where upper zone production U and lower zone production L are commingled and conducted to the surface to be carried away in flowline connection 56. The upper zone pump 58 and lower zone pump 38 are operated by a conventional sucker rod string 64 which is reciprocated by a pumping jack (not shown) or other apparatus well known to those of ordinary skill in the art.
Plunger pumps may be of the traveling plunger variety with a stationary barrel or may be of a traveling barrel variety with a stationary plunger according to the needs of a particular installation. In the instant invention, the sole FIGURE illustrates the upper pump of the stationary barrel and traveling plunger variety. Upper pump 58 has a stationary barrel 66 which is anchored to a conventional seating nipple 68 which is well known to those of ordinary skill in the art. The seating nipple 68 anchors the stationary portion of the upper pump and forms a seal with body 52 in the main passageway 70, a portion of which forms chamber 34. A polish rod 72 connects the movable portions of the upper and lower pumps and provides for reciprocating the movable portion of lower pump 38 along with the reciprocation of the movable portion of upper pump 58. A lower seal means 74 is provided in the passage 70 in body 52. The seal means 74 sealingly engages the lower portion of passage 70 below the side port 76 which connects check valve 32 to chamber 34 and provides a moving seal with polish rod 72 to isolate passage 70 between side port 76 and lower port 49. Upper seating nipple 68 seals side port 76 from upper port 54 to provide a seal between intake side of the upper pump 58 from the discharge port 62 of the upper pump 58. collet 78 is connected to lower seal means 74 and mechanically engages shoulder 80 to provide a mechanical lock to hold lower seal means 74 in position while polish rod 72 reciprocates therein. A tubular release mechanism 82 is attached to lower end of polish rod 72 to collapse collet 78 to a diameter smaller than the diameter of shoulder 80 when the dual zone pump assembly is lifted by sucker rod string 64 for withdrawal from the tubing string, providing for complete recovery of the dual zone pump assembly for service simply by withdrawing the assembly on the sucker rods when service is required. A lower landing nipple is provided in the tubular string 46 below the body 52 to seal the stationary portion of the lower pump 38 to the tubular string 46.
A dual zone producing apparatus according to this invention which provides a dual zone pump with separate pump elements for each zone is adaptable for a well which has differing producing zone pressures. Re ferring to my copending application, Ser. No. l63,795, filed July 19, 1972, entitled Method and Apparatus for Producing Multiple Zone Oil and Gas Wells, a chamber is disclosed for receiving production which drains from the multiple zones. A single pump then lifts the fluid from this chamber in which production from the various zones is commingled. In a well apparatus such as this, if one zone has a significantly higher pressure than the other zone, it would be possible for the higher pressure zone to maintain such a large pressure in the chamber where the production is commingled such that the lower pressure zone would not have adequate pressure to cause flow into the common chamber thereby preventing or reducing production from the lower pressure zone. Apparatus according to the instant invention, however, provides for a separate pump for each zone so that zones of different pressures may be pumped, each zone with its own pump, providing commingling of the pumped fluids so that the higher pressure in one zone will not affect the drainage and production from the lower pressure zone.
Commingling the produced liquids provides a completion which can be installed at much lower cost than a completion which provides for separate production of each zone to the surface.
Some state regulatory authorities have previously required separate production and measuring of liquids from each zone before the liquids are mixed. Current testing methods which determine the production rate from the various zones are now being recognized and permitted by these regulatory authorities whereby commingled production from a well can be allocated to the various zones based on individual production testing from each zone.
Provision of the parallel tubing string 28 with the second passage through packer 20 is an optional feature which may be incorporated if there is sufficient gas produced from a lower zone to require a separate vent for the lower zone gas LG.
The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. ln multiple zone well production and commingling apparatus comprising:
a well casing passing through upper and lower producing zones in a well bore, said casing having upper and lower openings through which production from said upper and lower zones can flow, respectively, into the well casing;
barrier means in said casing between said upper and lower openings, said barrier means having a longitudinal passage;
a tubular string having upper and lower sections, said tubular string extending from the top of the well bore to said barrier means and communicating with and secured to said longitudinal passage;
body means interposed between said upper and lower sections of said tubular string and located above said barrier means, said body means having a first longitudinal passageway and a side port extending from said first longitudinal passageway to the exterior of said body, said body means further having a second longitudinal passageway, said second longitudinal passageway having an upper port communicating with the upper section of said tubular string, said second passageway having a lower port communicating with the lower section of said tubular string which communicates with said second longitudinal passage and said lower zone;
an upper plunger pump in said tubular string and having a movable portion and a stationary portion;
a lower plunger pump located in said tubular string below said upper pump and having a movable portion and a stationary portion;
upper seal means for sealing the stationary portion of said upper plunger pump to said body between said side port and said upper port;
a polish rod connecting the movable portion of said upper pump to the movable portion of said lower lower seal means for sealing said polish rod to the lower end of said first longitudinal passageway between said side port and said lower port; and
lower landing nipple means in said tubular string located below said body for sealing the stationary portion of said lower pump to said tubular string.
2. Apparatus according to claim 1 further comprisa second passage in said barrier means; and
a second tubular string communicating with said second passage in said barrier means and extending to the top of the well bore for conducting gas from the lower zone to the top of the well bore.
3. In dual zone pumping and commingling apparatus adapted to be operated in a tubular string having upper and lower sections located in a well bore having casing passing through two producing zones and having a packer in the casing between the producing zones, the packer being connected to the tubular string, the improvement comprising:
a body having at least two longitudinal passages, said first passage aligned and connected to said tubular string, said body interposed between said upper and lower sections of the tubular string intermediate the packer and the top of the well bore, said body having a side port connecting said first passage to the exterior of said body, said second longitudinal passage having an upper port communicating with said upper section of said tubing string, said second passage having a lower port communicating with the lower section of said tubular string and the zone beneath said packer;
a check valve controlling flow in said side port, allowing upper zone production to flow into said first passage and preventing reverse flow;
an upper plunger pump in said tubular string, having a stationary portion, a movable portion, an intake port and a discharge port;
a lower plunger pump in said tubular string, having a stationary portion, a movable portion, an intake port and a discharge port;
a polish rod connecting the movable portion of said upper plunger pump to the movable portion of said lower plunger pump;
upper seating nipple means sealing and connecting the stationary portion of said upper plunger pump to said body between said side port and said upper port;
said upper plunger pump having said intake port communicating with said first passage above said upper seating nipple means and having said discharge port communicating with the tubular string above said upper seating nipple means;
seal means for sealing said polish rod to the lower rod of said first longitudinal passage between said side port and said upper port;
lower seating nipple means sealing and connecting the stationary portion of said lower plunger pump to the tubular string; and
said lower plunger pump having said intake port communicating with the tubular string below said lower seating nipple means, and having said discharge port communicating with the tubular string above said lower seating nipple means and below said body.
5 UNLTED ST QTES PATENT OFFICE CER'IKFECATE G1? CORRECTION Pa 3.765. 18? 'Dafied o ctoher 16 107i Inventor(s) Naylan N. Vencil It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:
In claim 3 atcolumn 6, line 26, delete "rod" at its econd, occurrence, and insert therfore end Signed and sealed this 9th day of Abril l97)4..
(SEAL) Attestz.
EDWARD I-I.F-LETCI-IER,JR. c. MARSHALL mum Attesting Officer Commissionerof Patents

Claims (3)

1. In multiple zone well production and commingling apparatus comprising: a well casing passing through upper and lower producing zones in a well bore, said casing having upper and lower openings through which production from said upper and lower zones can flow, respectively, into the well casing; barrier means in said casing between said upper and lower openings, said barrier means having a longitudinal passage; a tubular string having upper and lower sections, said tubular string extending from the top of the well bore to said barrier means and communicating with and secured to said longitudinal passage; body means interposed between said upper and lower sections of said tubular string and located above said barrier means, said body means having a first longitudinal passageway and a side port extending from said first longitudinal passageway to the exterior of said body, said body means further having a second longitudinal passageway, said second longitudinal passageway having an upper port communicating with the upper section of said tubular string, said second passageway having a lower port communicating with the lower section of said tubular string which communicates with said second longitudinal passage and said lower zone; an upper plunger pump in said tubular string and having a movable portion and a stationary portion; a lower plunger pump located in said tubular string below said upper pump and having a movable portion and a stationary portion; upper seal means for sealing the stationary portion of said upper plunger pump to said body between said side port and said upper port; a polish rod connecting the movable portion of said upper pump to the movable portion of said lower pump; lower seal means for sealing said polish rod to the lower end of said first longitudinal passageway between said side port and said lower port; and lower landing nipple means in said tubular string located below said body for sealing the stationary portion of said lower pump to said tubular string.
2. Apparatus according to claim 1 further comprising: a second passage in said barrier means; and a second tubular string communicating with said second passage in said barrier means and extending to the top of the well bore for conducting gas from the lower zone to the top of the well bore.
3. In dual zone pumping and commingling apparatus adapted to be operated in a tubular string having upper and lower sections located in a well bore having casing passing through two producing zones and having a packer in the casing between the producing zones, the packer being connected to the tubular string, the improvement comprising: a body having at least two longitudinal passages, said first passage aligned and connected to said tubular string, said body interposed between said upper and lower sections of the tubular string intermediate the packer and the top of the well bore, said body having a side port connecting said first passage to the exterior of said body, said second longitudinal passage having an upper port communicating with said upper section of said tubing string, said second passage having a lower port communicating with the lower section of said tubular string and the zone beneath said packer; a check valve controlling flow in said side port, allowing upper zone production to flow into said first passage and preventing reverse flow; an upper plunger pump in said tubular string, having a stationary portion, a movable portion, an intake port and a discharge port; a lower plunger pump in said tubular string, having a stationary portion, a movable portion, an intake port and a discharge port; a polish rod connecting the movable portion of said upper plunger pump to the movable portion of said lower plunger pump; upper seating nipple means sealing and connecting the stationary portion of said upper plunger pump to said body between said side port and said upper port; said upper plunger pump having said intake port communicating with said first passage above said upper seating nipple means and having said discharge port communicating with the tubular string above said upper seating nipple means; seal means for sealing said polish rod to the lower end of said first longitudinal passage between said side port and said upper port; lower seating nipple means sealing and connecting the stationary portion of said lower plunger pump to the tubular string; and said lower plunger pump having said intake port communicating with the tubular string below said lower seating nipple means, and having said discharge port communicating with the tubular string above said lower seating nipple means and below said body.
US00170166A 1971-08-09 1971-08-09 Method and apparatus for producing dual zone oil and gas wells Expired - Lifetime US3765483A (en)

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Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258787A (en) * 1979-07-11 1981-03-31 Baker International Corporation Subterranean well injection apparatus
US4593760A (en) * 1984-01-04 1986-06-10 The Upjohn Company Removal of volatile contaminants from the vadose zone of contaminated ground
US4660639A (en) * 1984-01-04 1987-04-28 The Upjohn Company Removal of volatile contaminants from the vadose zone of contaminated ground
USRE33102E (en) * 1984-01-04 1989-10-31 The Upjohn Company Removal of volatile contaminants from the vadose zone of contaminated ground
US4974674A (en) * 1989-03-21 1990-12-04 Westinghouse Electric Corp. Extraction system with a pump having an elastic rebound inner tube
US5106232A (en) * 1990-08-10 1992-04-21 Roy F. Weston, Inc. Method of in situ decontamination
US5160217A (en) * 1990-08-10 1992-11-03 Roy F. Weston, Inc. Method of in situ decontamination
US5238066A (en) * 1992-03-24 1993-08-24 Exxon Production Research Company Method and apparatus for improved recovery of oil and bitumen using dual completion cyclic steam stimulation
US5360067A (en) * 1993-05-17 1994-11-01 Meo Iii Dominic Vapor-extraction system for removing hydrocarbons from soil
EP0694676A1 (en) * 1994-07-29 1996-01-31 Elf Aquitaine Production Installation for oil well
US5505258A (en) * 1994-10-20 1996-04-09 Muth Pump Llc Parallel tubing system for pumping well fluids
US5554290A (en) * 1995-04-11 1996-09-10 Geraghty & Miller, Inc. Insitu anaerobic reactive zone for insitu metals precipitation and to achieve microbial de-nitrification
US5575589A (en) * 1995-04-11 1996-11-19 Geraghty & Miller, Inc. Apparatus and method for removing volatile contaminants from phreatic water
US5588490A (en) * 1995-05-31 1996-12-31 Geraghty & Miller, Inc. Method and system to achieve two dimensional air sparging
US5664911A (en) * 1991-05-03 1997-09-09 Iit Research Institute Method and apparatus for in situ decontamination of a site contaminated with a volatile material
US5707221A (en) * 1993-03-29 1998-01-13 Institit Francais Du Petrole Method of plural zone pumping utilizing controlled individual pump inlet in each zone
US5765639A (en) * 1994-10-20 1998-06-16 Muth Pump Llc Tubing pump system for pumping well fluids
EP0922835A2 (en) * 1997-12-11 1999-06-16 Camco International Inc. System and method for recovering fluids from a wellbore
US5934372A (en) * 1994-10-20 1999-08-10 Muth Pump Llc Pump system and method for pumping well fluids
US6007274A (en) * 1997-05-19 1999-12-28 Arcadis Geraghty & Miller In-well air stripping, oxidation, and adsorption
GB2345307A (en) * 1999-01-04 2000-07-05 Camco Int Dual electric submergible pumping system
US6116816A (en) * 1998-08-26 2000-09-12 Arcadis Geraghty & Miller, Inc. In situ reactive gate for groundwater remediation
US6143177A (en) * 1995-04-11 2000-11-07 Arcadis Geraghty & Miller, Inc. Engineered in situ anaerobic reactive zones
US6168388B1 (en) * 1999-01-21 2001-01-02 Camco International, Inc. Dual pump system in which the discharge of a first pump is used to power a second pump
US6250392B1 (en) 1994-10-20 2001-06-26 Muth Pump Llc Pump systems and methods
US6250390B1 (en) 1999-01-04 2001-06-26 Camco International, Inc. Dual electric submergible pumping systems for producing fluids from separate reservoirs
US6622791B2 (en) * 1996-12-02 2003-09-23 Kelley & Sons Group International Method and apparatus for increasing fluid recovery from a subterranean formation
US6684956B1 (en) * 2000-09-20 2004-02-03 Wood Group Esp, Inc. Method and apparatus for producing fluids from multiple formations
US20040149447A1 (en) * 2001-04-12 2004-08-05 Gilles Cantin Method and apparatus for controlling downhole flow
US20050155767A1 (en) * 2004-01-15 2005-07-21 Batho Peter F. System and method for offshore production with well control
US20090277623A1 (en) * 2008-05-08 2009-11-12 Quinlan William C Dual packer for a horizontal well
US20140119965A1 (en) * 2011-06-22 2014-05-01 Rivener Musavirovich Gabdullin Downhole pump assembly
US20150275889A1 (en) * 2014-03-25 2015-10-01 Muth Pump Llc Pumping system with plunger having a shaped edge and coating
US9822620B2 (en) 2014-03-25 2017-11-21 Muth Pump Llc Pumping system with plunger having a shaped edge and coating
US11168550B2 (en) * 2019-02-14 2021-11-09 Ravdos Holdings Inc. Seal configuration for downhole reciprocating pumps
RU2790622C1 (en) * 2022-09-13 2023-02-28 Публичное акционерное общество "Татнефть" имени В.Д. Шашина Dual tubing installation for selective completion of two reservoirs by one well

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US2642803A (en) * 1950-04-27 1953-06-23 Standard Oil Dev Co Dual production zone pump
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US2642803A (en) * 1950-04-27 1953-06-23 Standard Oil Dev Co Dual production zone pump
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US3283570A (en) * 1963-06-26 1966-11-08 Sun Oil Co Production measurement in multiple completion wells

Cited By (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4258787A (en) * 1979-07-11 1981-03-31 Baker International Corporation Subterranean well injection apparatus
US4593760A (en) * 1984-01-04 1986-06-10 The Upjohn Company Removal of volatile contaminants from the vadose zone of contaminated ground
US4660639A (en) * 1984-01-04 1987-04-28 The Upjohn Company Removal of volatile contaminants from the vadose zone of contaminated ground
USRE33102E (en) * 1984-01-04 1989-10-31 The Upjohn Company Removal of volatile contaminants from the vadose zone of contaminated ground
US4974674A (en) * 1989-03-21 1990-12-04 Westinghouse Electric Corp. Extraction system with a pump having an elastic rebound inner tube
US5106232A (en) * 1990-08-10 1992-04-21 Roy F. Weston, Inc. Method of in situ decontamination
US5160217A (en) * 1990-08-10 1992-11-03 Roy F. Weston, Inc. Method of in situ decontamination
US5664911A (en) * 1991-05-03 1997-09-09 Iit Research Institute Method and apparatus for in situ decontamination of a site contaminated with a volatile material
US5238066A (en) * 1992-03-24 1993-08-24 Exxon Production Research Company Method and apparatus for improved recovery of oil and bitumen using dual completion cyclic steam stimulation
US5707221A (en) * 1993-03-29 1998-01-13 Institit Francais Du Petrole Method of plural zone pumping utilizing controlled individual pump inlet in each zone
US5360067A (en) * 1993-05-17 1994-11-01 Meo Iii Dominic Vapor-extraction system for removing hydrocarbons from soil
US5657821A (en) * 1994-07-29 1997-08-19 Elf Aquitaine Production Facility for an oil well
FR2723143A1 (en) * 1994-07-29 1996-02-02 Elf Aquitaine INSTALLATION FOR OIL WELL
EP0694676A1 (en) * 1994-07-29 1996-01-31 Elf Aquitaine Production Installation for oil well
US5505258A (en) * 1994-10-20 1996-04-09 Muth Pump Llc Parallel tubing system for pumping well fluids
US5934372A (en) * 1994-10-20 1999-08-10 Muth Pump Llc Pump system and method for pumping well fluids
US6250392B1 (en) 1994-10-20 2001-06-26 Muth Pump Llc Pump systems and methods
WO1996012866A1 (en) * 1994-10-20 1996-05-02 Muth Pump L.L.C. System for pumping well fluids
US6543543B2 (en) 1994-10-20 2003-04-08 Muth Pump Llc Pump systems and methods
US5765639A (en) * 1994-10-20 1998-06-16 Muth Pump Llc Tubing pump system for pumping well fluids
US6632364B1 (en) 1995-04-11 2003-10-14 Arcadis G & M Engineered in situ anaerobic reactive zones
US6143177A (en) * 1995-04-11 2000-11-07 Arcadis Geraghty & Miller, Inc. Engineered in situ anaerobic reactive zones
US5554290A (en) * 1995-04-11 1996-09-10 Geraghty & Miller, Inc. Insitu anaerobic reactive zone for insitu metals precipitation and to achieve microbial de-nitrification
US5575589A (en) * 1995-04-11 1996-11-19 Geraghty & Miller, Inc. Apparatus and method for removing volatile contaminants from phreatic water
US6322700B1 (en) 1995-04-11 2001-11-27 Arcadis Geraghty & Miller Engineered in situ anaerobic reactive zones
US5588490A (en) * 1995-05-31 1996-12-31 Geraghty & Miller, Inc. Method and system to achieve two dimensional air sparging
US20040060705A1 (en) * 1996-12-02 2004-04-01 Kelley Terry Earl Method and apparatus for increasing fluid recovery from a subterranean formation
US6622791B2 (en) * 1996-12-02 2003-09-23 Kelley & Sons Group International Method and apparatus for increasing fluid recovery from a subterranean formation
US6007274A (en) * 1997-05-19 1999-12-28 Arcadis Geraghty & Miller In-well air stripping, oxidation, and adsorption
US6102623A (en) * 1997-05-19 2000-08-15 Arcadis Geraghty & Miller, Inc. In-well air stripping, oxidation, and adsorption
US6283674B1 (en) 1997-05-19 2001-09-04 Arcadis Geraghty & Miller In-well air stripping, oxidation, and adsorption
US6254310B1 (en) 1997-05-19 2001-07-03 Arcadis Geraghty & Miller, Inc. In-well air stripping and adsorption
EP0922835A3 (en) * 1997-12-11 2000-12-06 Camco International Inc. System and method for recovering fluids from a wellbore
EP0922835A2 (en) * 1997-12-11 1999-06-16 Camco International Inc. System and method for recovering fluids from a wellbore
US6116816A (en) * 1998-08-26 2000-09-12 Arcadis Geraghty & Miller, Inc. In situ reactive gate for groundwater remediation
US6280118B1 (en) 1998-08-26 2001-08-28 Arcadis Geraghty & Miller, Inc. In situ reactive gate
US6250390B1 (en) 1999-01-04 2001-06-26 Camco International, Inc. Dual electric submergible pumping systems for producing fluids from separate reservoirs
US6325143B1 (en) * 1999-01-04 2001-12-04 Camco International, Inc. Dual electric submergible pumping system installation to simultaneously move fluid with respect to two or more subterranean zones
GB2345307B (en) * 1999-01-04 2003-05-21 Camco Int Dual electric submergible pumping system installation to simultaneously move fluid with respect to two or more subterranean zones
GB2345307A (en) * 1999-01-04 2000-07-05 Camco Int Dual electric submergible pumping system
US6168388B1 (en) * 1999-01-21 2001-01-02 Camco International, Inc. Dual pump system in which the discharge of a first pump is used to power a second pump
US6684956B1 (en) * 2000-09-20 2004-02-03 Wood Group Esp, Inc. Method and apparatus for producing fluids from multiple formations
US7086471B2 (en) * 2001-04-12 2006-08-08 Schlumberger Technology Corporation Method and apparatus for controlling downhole flow
US20040149447A1 (en) * 2001-04-12 2004-08-05 Gilles Cantin Method and apparatus for controlling downhole flow
US7114572B2 (en) 2004-01-15 2006-10-03 Schlumberger Technology Corporation System and method for offshore production with well control
US20050155767A1 (en) * 2004-01-15 2005-07-21 Batho Peter F. System and method for offshore production with well control
US20090277623A1 (en) * 2008-05-08 2009-11-12 Quinlan William C Dual packer for a horizontal well
US7748443B2 (en) * 2008-05-08 2010-07-06 William C. Quinlan Dual packer for a horizontal well
US20100276161A1 (en) * 2008-05-08 2010-11-04 Quinlan William C Dual packer for a horizontal well
US8037941B2 (en) 2008-05-08 2011-10-18 Stephen H. Anderson Dual packer for a horizontal well
US8371390B2 (en) 2008-05-08 2013-02-12 Stephen H. Anderson Dual packer for a horizontal well
US20140119965A1 (en) * 2011-06-22 2014-05-01 Rivener Musavirovich Gabdullin Downhole pump assembly
US20150275889A1 (en) * 2014-03-25 2015-10-01 Muth Pump Llc Pumping system with plunger having a shaped edge and coating
US9745837B2 (en) * 2014-03-25 2017-08-29 Muth Pump Llc Velocity pumping system
US9822620B2 (en) 2014-03-25 2017-11-21 Muth Pump Llc Pumping system with plunger having a shaped edge and coating
US11168550B2 (en) * 2019-02-14 2021-11-09 Ravdos Holdings Inc. Seal configuration for downhole reciprocating pumps
RU2790622C1 (en) * 2022-09-13 2023-02-28 Публичное акционерное общество "Татнефть" имени В.Д. Шашина Dual tubing installation for selective completion of two reservoirs by one well

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