WO1994013928A1 - Stabilisateur a plusieurs bras dans un dispositif de forage ou de carottage - Google Patents
Stabilisateur a plusieurs bras dans un dispositif de forage ou de carottage Download PDFInfo
- Publication number
- WO1994013928A1 WO1994013928A1 PCT/BE1993/000073 BE9300073W WO9413928A1 WO 1994013928 A1 WO1994013928 A1 WO 1994013928A1 BE 9300073 W BE9300073 W BE 9300073W WO 9413928 A1 WO9413928 A1 WO 9413928A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- head
- pistons
- drilling
- arm
- piston
- Prior art date
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 51
- 239000003381 stabilizer Substances 0.000 title description 3
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 230000006641 stabilisation Effects 0.000 claims description 8
- 238000011105 stabilization Methods 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 239000010720 hydraulic oil Substances 0.000 description 7
- 239000003921 oil Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
Definitions
- Multi-arm stabilizer in a drilling or coring device
- the present invention relates to a control of at least two stabilization arms in a drilling or coring device 5, in particular of stabilization arms in a drilling or coring head, each arm being offset relative to the other on the periphery of the head and having one end pivotally mounted about an axis parallel to the axis of the head
- control comprises, per arm, a piston arranged to pivot the arm around the above axis so that the free excretion of the arm occupies two extreme positions, a first so-called rest position in which the arm is housed in the head and a second so-called active position in which said free end projects relative to this head, control means and
- synchronization means being arranged respectively to move the pistons from the storm fluid and so that the pistons act substantially simultaneously in the same direction and at the same amplitude.
- a separate control for each arm makes it possible to reduce the dimensions of the piston so as to be able to accommodate the latter in said drilling head and connect it directly to the arm concerned.
- the longitudinal axes of the pistons are tangent to a fictitious cylinder coaxial with the head, and preferably they are included in at least one plane transverse to the axis of the drilling head.
- the piston control means comprise an annular piston, coaxial with the head, arranged to be able to be moved along their common axis in a cylinder formed in the head, the annular piston being profiled , on the one hand, to be actuated by the drilling fluid and, on the other hand, to act on a fluid which actuates each of the aforementioned pistons and which is contained in the cylinder in communication with the chambers of the pistons.
- the drilling fluid only comes into contact with a minimum of elements constituting the control and this reduces or excludes the risk of blocking and wear of the control by component materials. this drilling fluid or carried by it.
- Figure 1 shows, with broken, in longitudinal section along the broken line II of Figure 2, a drill head equipped with the arm control according to the invention.
- Figure 2 is on another scale a cross section of the control of Figure 1, along the line II-II.
- the figures illustrate a control 1 of three stabilization arms 2 arranged by way of example in a drilling head 3.
- the three arms 2 evenly distributed over the periphery of the head 3 are located at the same level thereof relative to the anterior end of the head 3 following its progression in a hole being drilled.
- a person skilled in the art can easily conceive of other distributions of the arms 2 both on the periphery of the head 3 and along the longitudinal axis 4 thereof.
- each arm 2 is mounted at one of its ends in the drilling head 3, so as to be able to pivot around a pivot 5 with an axis 6 parallel to the longitudi ⁇ nal axis 4, so that the opposite end 7 of the arm 2 is located behind the pivot axis 6 relative to the direction of rotation 77 ( Figure 2) of the head 3 during drilling.
- the control 1 comprises for each stabilization arm 2 a piston 8 which is arranged in a suitable chamber 9 and which is arranged to rotate the corresponding arm 2 around its axis 6, between two extreme positions. In a first extreme so-called rest position shown in the figures, the arm 2 is housed in the head 3 or at least inside a cylinder coaxial with the head 3 and passing through the point or points thereof.
- each arm 2 has at its end 7, for connection to the corresponding piston 8, a T-shaped groove extending substantially from the end 7 towards the pivot 5 in the face facing the piston 8.
- the piston 8 From its side the piston 8 has a rod 80 whose free end has a T-profile adapted to the T-groove, the branches 81 of the T-profile being biconvexly curved to allow articulation with limited clearance of the T-profile in said groove during movement of the arm 2 by the piston 8.
- control 1 comprises control means 10 described below, for moving each of the pistons 8 from the pressure difference in the drilling fluid, between two places in the flow of this fluid, and means for synchronization 11 of the pistons 8 so that they are moved simultaneously by the same amplitude and in the same direction between the rest position and the active position so as to keep the drilling head 3 as coaxial as possible in the current hole drilling, even in the event of a lack of circularity of this hole, and so as to oppose the known lateral forces to which the head 3 is subjected during drilling.
- control means 10 described below, for moving each of the pistons 8 from the pressure difference in the drilling fluid, between two places in the flow of this fluid, and means for synchronization 11 of the pistons 8 so that they are moved simultaneously by the same amplitude and in the same direction between the rest position and the active position so as to keep the drilling head 3 as coaxial as possible in the current hole drilling, even in the event of a lack of circularity of this hole, and so as to oppose the known lateral forces to which the head 3 is subject
- the longitudinal axes 12 of the pistons 8 are tangent to a fictitious cylinder coaxial with the head 3 and the three axes 12 are advantageously understood, at least in the case of the illustrated embodiment in the figures, in the plane of the section of FIG. 2, perpendicular to the longitudinal axis 4.
- a second group (not shown) of three pistons 3 could be arranged in the same head 3 so that their axes 12 are also in another plane parallel to the plane of the above section.
- the drilling fluid can act directly on the pistons 3. However, as already mentioned above and as will appear clearly below, it is preferable that the drilling fluid acts indirectly, at least on one side, on the pistons 8.
- control means comprise an annular piston 13 of the same axis 4 as the head 3 and arranged in a cylinder 14 formed in the latter.
- the displacement of the annular piston 13 is delimited for example by two suitable circlips 15 arranged in the cylinder 14.
- the annular piston 13 comprises a hollow guide rod 16 and is equipped on its external surface with two annular seals 17 and 18 of which the sheet is explained below.
- the annular piston 13 has an axial passage 20 arranged for the flow of the drilling fluid to the various nozzles of the drilling head 3.
- the inlet of this passage 20 in the direction of flow of the drilling fluid (arrow 19) is a frustoconical surface
- the frustoconical surface 21 and the end face 22 of the annular piston 13 situated upstream are intended to receive the drilling fluid pressure which passes through the annular piston 13 .
- the annular piston 13 also has an annular surface 23, for example parallel to the end face 22, which is located opposite this face
- the cylin ⁇ dre 14 and the chambers 9 of the pistons 8 are in communication so that the hydraulic oil pressed out of said cylinder 14 causes the displacement of each piston 8 to rotate each arm 2 to an active position.
- the annular seals 17 and 18 prevent hydraulic oil from escaping into the drilling fluid due to the pressure communicated to it.
- the above-mentioned synchronization means 11 preferably comprise, according to the invention, a mesh 24, for example cut in one piece in each piston 8 and meshing with a toothed ring 25 coaxial with the drilling head 3.
- the ring gear 25 is mounted in a sealed chamber 26 which is in the extension of the cylinder 14, on the downstream side of the latter relative to the flow of the drilling fluid.
- the ring gear 25 then rotates freely around the piston rod 16, which acts as a pivot, depending on the displacement of the pistons 8.
- the ring gear 25 is located axially on the one hand by a ring 27 stopped by one of the above-mentioned circlips 15, located on the downstream side of the cylinder 14, and on the other hand by the bottom of the chamber 26 located on the downstream side thereof.
- the O-ring seal 17 is located on the piston rod 16 downstream from the bottom of the chamber 26 in a bore suitable for the sealed guide of this piston rod 16.
- the aforementioned hydraulic oil then also fills the chamber 26 and serves of lubricant for the rotation and for the meshing of the ring gear 25.
- the chamber 26 establishes for oil the communication between the cylinder 14 and the bottoms of the chambers 9, on the side opposite to the rods 80 of the pistons 8.
- each piston 8 is entirely subjected to the action of hydraulic oil, that is to say that, for example a conduit 27 is formed through the piston 8 (FIG. 2, piston of right) so that the hydraulic oil is present on both sides of the piston 8 in the chamber 9 and, by the operating clearance, on the lateral face of the piston 8.
- a conduit 27 is formed through the piston 8 (FIG. 2, piston of right) so that the hydraulic oil is present on both sides of the piston 8 in the chamber 9 and, by the operating clearance, on the lateral face of the piston 8.
- This chamber 9 is sealed relative to the exterior of the drilling head 3 by a closing flange
- each piston 8 comprises around its rod 80, of cross section smaller than the corresponding section of the piston 8, a return spring 31 of determined force.
- This spring 31 bears on the flange 28 to push the piston 8 into the rest position when the pressure of the drilling fluid is not sufficient to overcome the force of this spring 31.
- the drilling fluid has at the place of its flow upstream of the annular piston 13 a pressure greater than that of the place of its flow in the drilled hole, between drilling head 3 and hole wall.
- This pressure difference applied to the frustoconical surface 21 and to the end face 22 causes the annular piston 13 to move in the direction of arrow 19 y from the rest position shown in the figures.
- the annular piston 13 drives out the hydraulic oil, contained in the cylinder 14, towards the three chambers 9 via the chamber 26.
- the quantity of oil thus expelled repels each of the pistons 8 out of their chambers 9 towards the outside of the drilling head 3, the oil located on the side of the rods 80 in the chambers 9 being sent automatically to the bottoms side of the chambers 9 via the conduits 27, to add to the quantity of expelled oil and to bring out the pistons 8 all the more.
- the pistons 8 push the corresponding arms 2 until these are in contact with the wall of the drilled hole.
- the toothed ring 25 and the racks 24 are arranged so that in this movement the three arms move simultaneously and of the same amplitude so that by taking all three presses on said wall they maintain or bring back the drilling head 3 in the axis of the hole.
- the arms 2 can have the wear-resistant coatings and the shapes most suitable for the hole being drilled.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002128903A CA2128903C (fr) | 1992-12-04 | 1993-12-03 | Stabiliseur a bras multiples |
DE69309038T DE69309038T2 (de) | 1992-12-04 | 1993-12-03 | Mehrgelenkarm-stabilisator für eine bohrloch- oder kernbohrvorrichtung |
US08/302,714 US5582260A (en) | 1992-12-04 | 1993-12-03 | Control of at least two stabilizing arms in a drill or core device |
EP94900655A EP0624225B1 (fr) | 1992-12-04 | 1993-12-03 | Stabilisateur a plusieurs bras dans un dispositif de forage ou de carottage |
NO942841A NO306827B1 (no) | 1992-12-04 | 1994-07-29 | Styring av minst to stabiliserende armer i en bore- eller kjerneboreanordning |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE09201068 | 1992-12-04 | ||
BE9201068A BE1006434A3 (fr) | 1992-12-04 | 1992-12-04 | Commande d'au moins deux bras de stabilisation dans un dispositif de forage ou de carottage. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994013928A1 true WO1994013928A1 (fr) | 1994-06-23 |
Family
ID=3886561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BE1993/000073 WO1994013928A1 (fr) | 1992-12-04 | 1993-12-03 | Stabilisateur a plusieurs bras dans un dispositif de forage ou de carottage |
Country Status (8)
Country | Link |
---|---|
US (1) | US5582260A (fr) |
EP (1) | EP0624225B1 (fr) |
BE (1) | BE1006434A3 (fr) |
CA (1) | CA2128903C (fr) |
DE (1) | DE69309038T2 (fr) |
NO (1) | NO306827B1 (fr) |
RU (1) | RU2119575C1 (fr) |
WO (1) | WO1994013928A1 (fr) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5655609A (en) * | 1996-01-16 | 1997-08-12 | Baroid Technology, Inc. | Extension and retraction mechanism for subsurface drilling equipment |
WO1997032110A2 (fr) * | 1996-02-28 | 1997-09-04 | Baker Hughes Incorporated | Dispositif pour echantillonner et tester la carotte de fond |
GB2322651A (en) * | 1996-11-06 | 1998-09-02 | Camco Drilling Group Ltd | Downhole unit for use in boreholes |
US7422069B2 (en) | 2002-10-25 | 2008-09-09 | Baker Hughes Incorporated | Telescoping centralizers for expandable tubulars |
US7624798B2 (en) | 2005-05-27 | 2009-12-01 | Baker Hughes Incorporated | Centralizer for expandable tubulars |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9708428D0 (en) * | 1997-04-26 | 1997-06-18 | Camco Int Uk Ltd | Improvements in or relating to rotary drill bits |
US6116354A (en) * | 1999-03-19 | 2000-09-12 | Weatherford/Lamb, Inc. | Rotary steerable system for use in drilling deviated wells |
US7143848B2 (en) * | 2003-06-05 | 2006-12-05 | Armell Richard A | Downhole tool |
GB0312899D0 (en) * | 2003-06-05 | 2003-07-09 | Armell Richard A | Downhole tool |
GB2458527B (en) * | 2008-03-25 | 2012-07-25 | Hunting Welltonic Ltd | High expansion anchoring and stabilisation device |
US8157024B2 (en) * | 2008-12-04 | 2012-04-17 | Schlumberger Technology Corporation | Ball piston steering devices and methods of use |
US8087479B2 (en) * | 2009-08-04 | 2012-01-03 | Baker Hughes Incorporated | Drill bit with an adjustable steering device |
US9022117B2 (en) | 2010-03-15 | 2015-05-05 | Weatherford Technology Holdings, Llc | Section mill and method for abandoning a wellbore |
CN103221626B (zh) | 2010-09-09 | 2015-07-15 | 国民油井华高有限公司 | 具有地层接口构件和控制系统的井下旋转式钻井设备 |
US8869916B2 (en) | 2010-09-09 | 2014-10-28 | National Oilwell Varco, L.P. | Rotary steerable push-the-bit drilling apparatus with self-cleaning fluid filter |
US9458679B2 (en) * | 2011-03-07 | 2016-10-04 | Aps Technology, Inc. | Apparatus and method for damping vibration in a drill string |
US9181756B2 (en) | 2012-07-30 | 2015-11-10 | Baker Hughes Incorporated | Drill bit with a force application using a motor and screw mechanism for controlling extension of a pad in the drill bit |
US9140074B2 (en) | 2012-07-30 | 2015-09-22 | Baker Hughes Incorporated | Drill bit with a force application device using a lever device for controlling extension of a pad from a drill bit surface |
US9255449B2 (en) | 2012-07-30 | 2016-02-09 | Baker Hughes Incorporated | Drill bit with electrohydraulically adjustable pads for controlling depth of cut |
US9103175B2 (en) | 2012-07-30 | 2015-08-11 | Baker Hughes Incorporated | Drill bit with hydraulically-activated force application device for controlling depth-of-cut of the drill bit |
US9938781B2 (en) | 2013-10-11 | 2018-04-10 | Weatherford Technology Holdings, Llc | Milling system for abandoning a wellbore |
US10037836B2 (en) | 2015-04-03 | 2018-07-31 | Schlumberger Technology Corporation | Slickline manufacturing techniques |
US10167690B2 (en) | 2015-05-28 | 2019-01-01 | Weatherford Technology Holdings, Llc | Cutter assembly for cutting a tubular |
US10378292B2 (en) | 2015-11-03 | 2019-08-13 | Nabors Lux 2 Sarl | Device to resist rotational forces while drilling a borehole |
CN106948802B (zh) * | 2017-03-07 | 2020-04-10 | 中国石油天然气集团公司 | 钻具的减震方法 |
WO2019067998A1 (fr) * | 2017-09-29 | 2019-04-04 | Baker Hughes, A Ge Company, Llc | Outils de forage ayant une région de jauge adaptée sélectivement pour déplacement de trépan réduit et procédé de forage avec ceux-ci |
CA3082540C (fr) * | 2017-12-29 | 2022-07-05 | Halliburton Energy Services, Inc. | Revetement de piston incurve et ensemble tampon monobloc |
US11795763B2 (en) | 2020-06-11 | 2023-10-24 | Schlumberger Technology Corporation | Downhole tools having radially extendable elements |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1604200A (en) * | 1925-04-06 | 1926-10-26 | Otho S Shaw | Well-drilling apparatus |
FR1554959A (fr) * | 1967-01-25 | 1969-01-24 | ||
FR2431023A1 (fr) * | 1978-07-15 | 1980-02-08 | Bergwerksverband Gmbh | Installation de mesure pour trou de forage |
EP0159573A1 (fr) * | 1984-04-02 | 1985-10-30 | Witte Bohrtechnik GmbH | Procédé et dispositif pour la pose des conduites souterraines d'intérieur inaccessible par poussage contrôlé |
US4776397A (en) * | 1986-10-06 | 1988-10-11 | Ava International Corporation | Tool for lowering into centered position within a well bore |
GB2211446A (en) * | 1987-10-26 | 1989-07-05 | Houston Engineers Inc | Offshore well leg internal cutting apparatus |
WO1991009202A1 (fr) * | 1989-12-19 | 1991-06-27 | Diamant Boart Stratabit S.A. | Outil de forage destine a elargir un puits |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4416339A (en) * | 1982-01-21 | 1983-11-22 | Baker Royce E | Bit guidance device and method |
US4471843A (en) * | 1982-04-23 | 1984-09-18 | Conoco Inc. | Method and apparatus for rotary drill guidance |
US4606417A (en) * | 1985-04-08 | 1986-08-19 | Webb Derrel D | Pressure equalized stabilizer apparatus for drill string |
US4635736A (en) * | 1985-11-22 | 1987-01-13 | Shirley Kirk R | Drill steering apparatus |
FR2648861B1 (fr) * | 1989-06-26 | 1996-06-14 | Inst Francais Du Petrole | Dispositif pour guider un train de tiges dans un puits |
US5181576A (en) * | 1991-02-01 | 1993-01-26 | Anadrill, Inc. | Downhole adjustable stabilizer |
US5265684A (en) * | 1991-11-27 | 1993-11-30 | Baroid Technology, Inc. | Downhole adjustable stabilizer and method |
US5311953A (en) * | 1992-08-07 | 1994-05-17 | Baroid Technology, Inc. | Drill bit steering |
-
1992
- 1992-12-04 BE BE9201068A patent/BE1006434A3/fr not_active IP Right Cessation
-
1993
- 1993-12-03 RU RU94040732A patent/RU2119575C1/ru active
- 1993-12-03 EP EP94900655A patent/EP0624225B1/fr not_active Expired - Lifetime
- 1993-12-03 CA CA002128903A patent/CA2128903C/fr not_active Expired - Lifetime
- 1993-12-03 DE DE69309038T patent/DE69309038T2/de not_active Expired - Lifetime
- 1993-12-03 US US08/302,714 patent/US5582260A/en not_active Expired - Lifetime
- 1993-12-03 WO PCT/BE1993/000073 patent/WO1994013928A1/fr active IP Right Grant
-
1994
- 1994-07-29 NO NO942841A patent/NO306827B1/no not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1604200A (en) * | 1925-04-06 | 1926-10-26 | Otho S Shaw | Well-drilling apparatus |
FR1554959A (fr) * | 1967-01-25 | 1969-01-24 | ||
FR2431023A1 (fr) * | 1978-07-15 | 1980-02-08 | Bergwerksverband Gmbh | Installation de mesure pour trou de forage |
EP0159573A1 (fr) * | 1984-04-02 | 1985-10-30 | Witte Bohrtechnik GmbH | Procédé et dispositif pour la pose des conduites souterraines d'intérieur inaccessible par poussage contrôlé |
US4776397A (en) * | 1986-10-06 | 1988-10-11 | Ava International Corporation | Tool for lowering into centered position within a well bore |
GB2211446A (en) * | 1987-10-26 | 1989-07-05 | Houston Engineers Inc | Offshore well leg internal cutting apparatus |
WO1991009202A1 (fr) * | 1989-12-19 | 1991-06-27 | Diamant Boart Stratabit S.A. | Outil de forage destine a elargir un puits |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5655609A (en) * | 1996-01-16 | 1997-08-12 | Baroid Technology, Inc. | Extension and retraction mechanism for subsurface drilling equipment |
GB2325307B (en) * | 1996-02-28 | 2000-05-10 | Baker Hughes Inc | Downhole core sampling and testing apparatus |
WO1997032110A2 (fr) * | 1996-02-28 | 1997-09-04 | Baker Hughes Incorporated | Dispositif pour echantillonner et tester la carotte de fond |
WO1997032110A3 (fr) * | 1996-02-28 | 1997-11-06 | Baker Hughes Inc | Dispositif pour echantillonner et tester la carotte de fond |
GB2325307A (en) * | 1996-02-28 | 1998-11-18 | Baker Hughes Inc | Downhole core sampling and testing apparatus |
US6401840B1 (en) | 1996-02-28 | 2002-06-11 | Baker Hughes Incorporated | Method of extracting and testing a core from a subterranean formation |
US5957221A (en) * | 1996-02-28 | 1999-09-28 | Baker Hughes Incorporated | Downhole core sampling and testing apparatus |
US6148933A (en) * | 1996-02-28 | 2000-11-21 | Baker Hughes Incorporated | Steering device for bottomhole drilling assemblies |
GB2322651A (en) * | 1996-11-06 | 1998-09-02 | Camco Drilling Group Ltd | Downhole unit for use in boreholes |
GB2322651B (en) * | 1996-11-06 | 2000-09-20 | Camco Drilling Group Ltd | A downhole unit for use in boreholes in a subsurface formation |
US5971085A (en) * | 1996-11-06 | 1999-10-26 | Camco International (Uk) Limited | Downhole unit for use in boreholes in a subsurface formation |
EP0841462A3 (fr) * | 1996-11-06 | 1999-01-20 | Camco Drilling Group Limited | Outil de fond de puits avec au moins un élément de contact de la paroi d'un puits |
US7422069B2 (en) | 2002-10-25 | 2008-09-09 | Baker Hughes Incorporated | Telescoping centralizers for expandable tubulars |
US7624798B2 (en) | 2005-05-27 | 2009-12-01 | Baker Hughes Incorporated | Centralizer for expandable tubulars |
Also Published As
Publication number | Publication date |
---|---|
CA2128903A1 (fr) | 1994-06-23 |
RU94040732A (ru) | 1997-05-27 |
EP0624225A1 (fr) | 1994-11-17 |
BE1006434A3 (fr) | 1994-08-23 |
DE69309038D1 (de) | 1997-04-24 |
NO942841D0 (no) | 1994-07-29 |
RU2119575C1 (ru) | 1998-09-27 |
EP0624225B1 (fr) | 1997-03-19 |
CA2128903C (fr) | 2000-11-28 |
US5582260A (en) | 1996-12-10 |
NO306827B1 (no) | 1999-12-27 |
DE69309038T2 (de) | 1997-09-18 |
NO942841L (no) | 1994-07-29 |
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