CN103541666A - Hydraulic variable-diameter centralizer - Google Patents

Hydraulic variable-diameter centralizer Download PDF

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Publication number
CN103541666A
CN103541666A CN201310581225.6A CN201310581225A CN103541666A CN 103541666 A CN103541666 A CN 103541666A CN 201310581225 A CN201310581225 A CN 201310581225A CN 103541666 A CN103541666 A CN 103541666A
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CN
China
Prior art keywords
shell
central tube
spring
grooves
cylindrical
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CN201310581225.6A
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Chinese (zh)
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CN103541666B (en
Inventor
杜锦城
梁政
赵勇
叶哲伟
何虹钢
李双双
张�杰
张梁
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西南石油大学
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Priority to CN201310581225.6A priority Critical patent/CN103541666B/en
Publication of CN103541666A publication Critical patent/CN103541666A/en
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Publication of CN103541666B publication Critical patent/CN103541666B/en

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Abstract

The invention relates to a hydraulic variable-diameter centralizer used for convention oil gas well drilling and solid mineral resource well drilling, and the hydraulic variable-diameter centralizer solves the problems that an underground variable-diameter centralizer is large in starting force and short in installation distance. According to the technical scheme, sliding blocks penetrate through lower cylindrical body through grooves and are embedded into inner central tube annular grooves, an outer central tube is arranged in a revolving cylindrical body in a sleeved mode, protrusive splines outside the outer central tube are embedded into spiral grooves in the revolving cylinder body, a spring c is arranged outside the outer central tube in a sleeved mode, an upper cylindrical body is in threaded connection with a lower cylindrical body, a spring b is arranged outside the upper cylindrical body in a sleeved mode, and a sliding sleeve is arranged in the upper cylindrical body in a sleeved mode. A centralizing arm a is hinged to the triangular prism surface of the sliding sleeve, a centralizing arm b is hinged to the triangular prism surface of the lower cylindrical body and hinged to the centralizing arm a, a locking cylinder is placed in an upper cylindrical body through hole, a spring a is put in the locking cylinder, and a press plate and the upper cylindrical body are fixed through screws a. The hydraulic variable-diameter centralizer converts axial motion of the inner central tube and the outer central tube into circumferential direction rotation of the revolving cylindrical body, converts axial thrust generated by hydraulic pressure into circumferential direction centralizing force, and is reliable in supporting and large in installation distance.

Description

A kind of fluid power reducing centralizer
Technical field
The present invention relates to a kind of fluid power reducing centralizer for Oil/gas Well underreamer and deep formation mineral mining.
Background technology
In drilling process in order to control and adjust well hole deviation, can use in a large number centralizer, the centralizer using at present is mainly divided into rigid centralizer and elastic centralizer, rigid centralizer support force is large, but shape fixes, and cannot be applicable to irregular wellbore, elastic centralizer is mainly according to the principle design of spring, have higher reset force, but be lowered in process, can produce great axial rub resistance, support force is also not as good as rigid centralizer.The reducing centralizer that also has now part can down-hole to start, but usually excessive because of tripping force in the larger well section of hole deviation and net horizontal section, cannot support the weight of sufficient length drill string, and on compared with stub boring intercolumniation, centralizer is frequently installed, increase drilling cost.
In drilling process, should try one's best and control accurately and effectively well track, improve rate of penetration, reduce axial rub resistance, reduce drilling cost.Centralizer, as the key tool of drilling process, should meet the technical requirements of complex drilling condition as far as possible, reduces financial cost, and the centralizer using at present all has certain limitation.
Summary of the invention
The object of the invention is: large in order to solve in drilling process down-hole reducing centralizer tripping force, the problem that installing space is short, spy provides a kind of fluid power reducing centralizer.By pump pressure, control reducing scope, have a grade reducing, tripping force is little, and support force is large.
In order to achieve the above object, the present invention is by the following technical solutions: a kind of hydraulic diameter-variable stabilizer, comprises upper shell, screw a, pressing plate, spring a, locking cylinder, pin a, righting arm a, sliding sleeve, spring b, water nozzle, baffle ring, spring c, pin b, spacer ring, thrust bearing a, screw b, slide block, inner central tube, rotating cylinder body, exterior central tube, thrust bearing b, righting arm b, pin c, lower shell, its architectural feature is: upper shell upper end is provided with standard screw thread and is connected with upper drilling string, bottom is provided with standard screw thread and is connected with lower shell, upper shell is radially processed three through holes, through hole medial end has a step, three through holes are all 120 ° of distributions at circumferencial direction, and upper shell is axially processed three grooves, and three grooves are all 120 ° of distributions at circumferencial direction, three grooves pass respectively three through hole outboard end, half that recess width is through-hole diameter, locking cylinder is a cylinder, one end sealing, and other end end face gradient is 20~30 °, a groove of processing in the middle of end face, recess width equals upper shell recess width, and groove depth capacity is twice upper shell depth of groove, three locking cylinders are put into three through holes of upper shell, and the contact surface of locking cylinder and upper shell through hole adopts sealing ring sealing, and three spring a are installed on respectively three locking cylinder inner chambers, and during installation, spring a is in compressive state, three pressing plates are arranged on respectively in three grooves of upper shell, and pressing plate is fixedly connected with upper shell groove with screw a, lower shell bottom is provided with one section of equilateral triangular prism, and thrust bearing b is arranged on the equilateral triangular prism of lower shell upper surface, turn inner barrel and be processed with three helical grooves, three helical grooves are all 120 ° of distributions at circumferencial direction, and there are three distinguish rotating cylinder external body upper end, and three distinguish are all 120 ° of distributions, similar ratchet structure at circumferencial direction, rotating cylinder body is inserted in lower shell, and lower surface contacts with thrust bearing b, there are three protruding splines exterior central tube lower end, and three splines are all 120 ° of distributions at circumferencial direction, and protruding spline is identical with rotating cylinder body helical groove helical angle, and exterior central tube is inserted in lower shell, and exterior central tube outer projection spline embeds rotating cylinder body internal helicoid groove, lower shell middle part is axially arranged with three grooves and is communicated with lower shell interior or exterior space, three grooves are all 120 ° of distributions at circumferencial direction, water nozzle and inner central tube screwed connection, inner central tube external process has a ring annular groove, inner central tube is positioned over lower shell inner chamber, three slide blocks embed in inner central tube annular groove through three grooves of lower shell respectively, exterior central tube is fixedly connected with three slide blocks respectively with screw b, thrust bearing a is inserted in exterior central tube, and contact with rotating cylinder body upper surface, spacer ring is inserted in exterior central tube, and contact with thrust bearing a, spring c is arranged on spacer ring, during installation, spring c is in compressive state, baffle ring and the screwed connection of exterior central tube top, spring b is installed on the step of upper shell bottom, and during installation, spring b is in compressive state, sliding sleeve is inserted in upper shell, there is multistage sawtooth button inner side, sliding sleeve upper end, sliding sleeve lower end external process is equilateral triangular prism, righting arm a is articulated with on equilateral triangular prism one cylinder in sliding sleeve bottom with pin a, lower shell bottom has standard screw thread to be connected with lower drilling string, lower shell bottom has one section for equilateral triangular prism, and righting arm b is articulated with on equilateral triangular prism one cylinder in lower shell bottom with pin c, and righting arm a and righting arm b are hinged with pin b.
The invention has the beneficial effects as follows: (1) this centralizer tripping force is little, rotating cylinder body internal helicoid groove helical angle is very little, axial liquid pressure can be enlarged into great peripheral force, supports righting rod and props up; (2), in being lowered to process, righting arm is regained, and can not produce axial rub resistance; (3) after reducing, can lock, support force is very large; (4) righting arm all can effectively be avoided the problem of being blocked by landwaste in the process that struts and regain; (5) this centralizer hydraulic coupling drives conveniently, and frame for movement is simple and reliable, for conventional gas and oil drilling well and solid mineral reserve drillng operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of fluid power reducing of the present invention centralizer righting arm while strutting;
Structural representation when Fig. 2 is the withdrawal of a kind of fluid power reducing of the present invention centralizer righting arm;
Fig. 3 is Figure 1A-A cross-sectional view;
Fig. 4 is Fig. 2 B-B cross-sectional view;
In figure: 1. upper shell, 2. screw a, 3. pressing plate, 4. spring a, 5. locking cylinder, 6. pin a, 7. righting arm a, 8. sliding sleeve, 9. spring b, 10. water nozzle, 11. baffle rings, 12. spring c, 13. pin b, 14. spacer rings, 15. thrust bearing a, 16. screw b, 17. slide blocks, 18 inner central tubes, 19. rotating cylinder bodies, 20. exterior central tubes, 21. thrust bearing b, 22. righting arm b, 23. pin c, 24. lower shells.
The specific embodiment
As depicted in figs. 1 and 2, a kind of fluid power reducing of the present invention centralizer comprises upper shell 1, screw a2, pressing plate 3, spring a4, locking cylinder 5, pin a6, righting arm a7, sliding sleeve 8, spring b9, water nozzle 10, baffle ring 11, spring c12, pin b13, spacer ring 14, thrust bearing a15, screw b16, slide block 17, inner central tube 18, rotating cylinder body 19, exterior central tube 20, thrust bearing b21, righting arm b22, pin c23, lower shell 24, upper shell 1 upper end is provided with standard screw thread and is connected with upper drilling string, bottom is provided with standard screw thread and is connected with lower shell 24, upper shell 1 is radially processed three through holes, through hole medial end has a step, three through holes are all 120 ° of distributions at circumferencial direction, and upper shell 1 is three grooves of processing axially, and three grooves are all 120 ° of distributions at circumferencial direction, three grooves pass respectively three through hole outboard end, half that recess width is through-hole diameter, locking cylinder 5 is a cylinder, one end sealing, other end end face gradient is 20~30 °, a groove of processing in the middle of end face, and recess width equals upper shell 1 recess width, groove depth capacity is twice upper shell 1 depth of groove, three locking cylinders 5 are put into 1 three through holes of upper shell, and locking cylinder 5 adopts sealing ring sealing with the contact surface of upper shell 1 through hole, and three spring a4 are installed on respectively three locking cylinder 5 inner chambers, during installation, spring a4 is in compressive state, three pressing plates 3 are arranged on respectively in 1 three grooves of upper shell, and pressing plate 3 use screw a2 are fixedly connected with upper shell 1 groove, lower shell 24 bottoms are provided with one section for equilateral triangular prism, thrust bearing b21 is arranged on the equilateral triangular prism of lower shell 24 upper surface, rotating cylinder body 19 inside are processed with three helical grooves, three helical grooves are all 120 ° of distributions at circumferencial direction, rotating cylinder body 19 outer upper ends have three distinguish, three distinguish are all 120 ° of distributions at circumferencial direction, similar ratchet structure, rotating cylinder body 19 is inserted in lower shell 24, lower surface contacts with thrust bearing b21, there are three protruding splines exterior central tube 20 lower ends, three splines are all 120 ° of distributions at circumferencial direction, projection spline is identical with rotating cylinder body 19 helical groove helical angles, exterior central tube 20 is inserted in lower shell 24, exterior central tube 20 outer projection splines embed in rotating cylinder body 19 internal helicoid grooves, lower shell 24 middle parts are processed with three grooves and are communicated with lower shell 24 interior or exterior spaces, three grooves are all 120 ° of distributions at circumferencial direction, water nozzle 10 and inner central tube 18 use screwed connections, inner central tube 18 external process have a ring annular groove, inner central tube 18 is positioned over lower shell 24 inner chambers, three slide blocks 17 embed inner central tube 18 annular grooves through 24 3 grooves of lower shell respectively, exterior central tube 20 is connected with three slide blocks 17 respectively by screw b16, thrust bearing a15 is inserted in exterior central tube 20, and contact with rotating cylinder body 19 upper surfaces, spacer ring 14 is inserted in exterior central tube 20, and contact with thrust bearing a15, spring c12 is arranged on spacer ring 14, during installation, spring c12 is in compressive state, baffle ring 11 and exterior central tube 20 top screwed connections, spring b9 is installed on upper shell 1 bottom step, and during installation, spring b9 is in compressive state, sliding sleeve 8 is inserted in upper shell 1, there is multistage sawtooth button sliding sleeve 8 inner sides, upper end, outside, lower end is equilateral triangular prism, righting arm a7 is articulated with on sliding sleeve 8 equilateral triangular prism one cylinders in bottom with pin a6, lower shell 24 bottoms have standard screw thread to be connected with lower drilling string, lower shell 24 bottoms have one section for equilateral triangular prism, and righting arm b22 is articulated with on lower shell 24 equilateral triangular prism one cylinders in bottom with pin c23, and righting arm a7 and righting arm b22 are hinged with pin b13.
As shown in Figure 3 and Figure 4, righting arm b22 is articulated with on the cylinder of the equilateral triangular prism part of lower shell 24, three righting arm b22 are all 120 ° of distributions at circumferencial direction, rotating cylinder body 19 inside are processed with three helical grooves, three helical grooves are all 120 ° of distributions at circumferencial direction, rotating cylinder body 19 outer upper ends have three distinguish, three distinguish are all 120 ° of distributions at circumferencial direction, similar ratchet structure, there are three protruding splines exterior central tube 20 outsides, three splines are all 120 ° of distributions at circumferencial direction, projection spline is identical with rotating cylinder body 19 helical groove helical angles, exterior central tube 20 is inserted in lower shell 24, exterior central tube 20 outer projection splines embed rotating cylinder body 19 internal helicoid grooves.
The operating principle of a kind of fluid power reducing of the present invention centralizer is: by controlling pump pressure, change the inner drilling liquid pressure of drill string, when the inner drilling liquid pressure of drill string raises, water nozzle 10 is produced to thrust to be increased, water nozzle 10, inner central tube 18, screw b16, slide block 17, exterior central tube 20 and baffle ring 11 integral body move downward, Compress Spring c12, exterior central tube 20 axially-movables, rotating cylinder body 19 is circumferentially rotated, the helical angle of rotating cylinder body 19 internal helicoid grooves is very little, the end thrust that 20 axially-movables produce to exterior central tube is enlarged into the rotatory force of rotating cylinder body 19 circumferential movement, rotating cylinder body 19 rotates, strut righting arm b22, righting arm b22 pulls righting arm a7 to strut simultaneously, sliding sleeve 8 moves axially downwards, Compress Spring b9, when sliding sleeve 8 sawtooth buttons move to locking cylinder 5 positions, locking cylinder 5 is at the inner drilling liquid pressure lower compression of drill string spring a4, locking cylinder 5 extends radially out, enter in sliding sleeve 8 sawtooth buttons locked, drilling liquid pressure continues to raise, repeat above-mentioned action, righting arm b22 struts diameter and further becomes large, sliding sleeve 8 moves downward displacement to be increased, it is dead that locking cylinder 5 enters sliding sleeve 8 next stage sawtooth padlocks, after locked, can reduce drilling liquid pressure, under spring c12 effect, water nozzle 10, inner central tube 18, screw b16, slide block 17, exterior central tube 20 and baffle ring 11 integral body move upward, rotating cylinder body 19 goes back to initial position, locking cylinder 5 is still locked by sliding sleeve 8 in low drilling liquid pressure situation, a kind of fluid power reducing centralizer keeps large reducing state, reduce drilling liquid pressure to threshold, locking cylinder 5 is under spring a4 effect, get back to initial position, sliding sleeve 8 releases, under spring b9 effect, sliding sleeve 8 moves upward, and righting arm a7 and righting arm b22 regain initial position.

Claims (5)

1. a fluid power reducing centralizer, by upper shell (1), screw a (2), pressing plate (3), spring a (4), locking cylinder (5), pin a (6), righting arm a (7), sliding sleeve (8), spring b (9), water nozzle (10), baffle ring (11), spring c (12), pin b (13), spacer ring (14), thrust bearing a (15), screw b (16), slide block (17), inner central tube (18), rotating cylinder body (19), exterior central tube (20), thrust bearing b (21), righting arm b (22), pin c (23), lower shell (24) forms, it is characterized in that: upper shell (1) upper end is provided with standard screw thread and is connected with upper drilling string, bottom is provided with standard screw thread and is connected with lower shell (24), upper shell (1) is radially processed three through holes, upper shell (1) is axially processed three grooves, three locking cylinders (5) are put into (1) three through hole of upper shell, locking cylinder (5) adopts sealing ring sealing with the contact surface of upper shell (1) through hole, three spring a(4) be installed on respectively three locking cylinders (5) inner chamber, during installation, spring a(4) in compressive state, three pressing plates (3) are arranged on respectively in (1) three groove of upper shell, and pressing plate (3) is used screw a(2) be fixedly connected with upper shell (1) groove, lower shell (24) bottom arranges one section of equilateral triangular prism, thrust bearing b(21) be arranged on the equilateral triangular prism of lower shell (24) upper surface, rotating cylinder body (19) inside is provided with three helical grooves, and outer upper ends is provided with three distinguish, and rotating cylinder body (19) is inserted in lower shell (24), its lower surface and thrust bearing b(21) contact, there are three protruding splines exterior central tube (20) lower end, and exterior central tube (20) is inserted in lower shell (24), and exterior central tube (20) outer projection spline embeds in rotating cylinder body (19) internal helicoid groove, lower shell (24) middle part is axially provided with three grooves, three groove circumferencial directions be 120 ° uniform, inner central tube (18) external process has a ring annular groove, inner central tube (18) is positioned over lower shell (24) inner chamber, three slide blocks (17) embed in inner central tube (18) annular groove through (24) three grooves of lower shell respectively, and exterior central tube (20) is used screw b(16) be fixedly connected with three slide blocks (17) respectively, water nozzle (10) and screwed connection for inner central tube (18), thrust bearing a(15) being inserted in exterior central tube (20) contacts with rotating cylinder body (19) upper surface, spacer ring (14) is inserted in exterior central tube (20) and thrust bearing a(15) contact, spring c(12) be compressive state and be arranged on spacer ring (14) above, baffle ring (11) and exterior central tube (20) top screwed connection, spring b(9) being compressive state is arranged on the step of upper shell (1) bottom, sliding sleeve (8) is inserted in upper shell (1), righting arm a(7) use pin a(6) be articulated with on a cylinder of the equilateral triangular prism in sliding sleeve (8) bottom, lower shell (24) bottom and lower drilling string screwed connection, lower shell (24) bottom has one section for equilateral triangular prism, righting arm b(22) use pin c(23) be articulated with on equilateral triangular prism one cylinder in lower shell (24) bottom righting arm a(7) with righting arm b(22) use pin b(13) hinged.
2. fluid power reducing centralizer according to claim 1, it is characterized in that: described upper shell (1) radially three through hole medial ends has a step, three through holes are 120 ° of distributions at circumferencial direction, axial three grooves of upper shell (1) are 120 ° of distributions at circumferencial direction, three grooves pass respectively three through hole outboard end, half that recess width is through-hole diameter.
3. fluid power reducing centralizer according to claim 1, it is characterized in that: described locking cylinder (5) is a cylinder, one end sealing, other end end face gradient is 20~30 °, a groove of processing in the middle of end face, recess width equals upper shell (1) recess width, and groove depth capacity equals twice upper shell (1) depth of groove.
4. fluid power reducing centralizer according to claim 1, it is characterized in that: described rotating cylinder body (19) inside is provided with three helical grooves, three helical grooves are all 120 ° of distributions at circumferencial direction, three distinguish of rotating cylinder body (19) outer upper ends are 120 ° of distributions, similar ratchet structure at circumferencial direction; Exterior central tube (20) lower end is provided with three protruding splines, and three splines are 120 ° of distributions at circumferencial direction, and protruding spline is identical with rotating cylinder body (19) helical groove helical angle.
5. fluid power reducing centralizer according to claim 1, is characterized in that: described sliding sleeve (8) upper inner is provided with multistage sawtooth button, and sliding sleeve (8) lower end external process is equilateral triangular prism.
CN201310581225.6A 2013-11-19 2013-11-19 A kind of hydraulic variable-diameter centralizer CN103541666B (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104358527A (en) * 2014-10-15 2015-02-18 西南石油大学 Large plunger type reducing centralizer
CN104832113A (en) * 2015-04-29 2015-08-12 西安威盛电子科技股份有限公司 Self-adaptive down-hole hydraulic centering device and centering method thereof
CN104912493A (en) * 2015-07-02 2015-09-16 西南石油大学 Hydraulic type anti-skidding bit feed tool
CN105003211A (en) * 2015-07-01 2015-10-28 西南石油大学 Self-propelled drilling pressure applying tool
CN105221084A (en) * 2015-10-29 2016-01-06 中国石油集团渤海钻探工程有限公司 A kind of Wedged hydraulic centralizing device
CN105275397A (en) * 2015-10-27 2016-01-27 西南石油大学 Remote-control diameter-variable stabilizer
GB2533779A (en) * 2014-12-24 2016-07-06 Reeves Wireline Tech Ltd A logging tool
CN106930698A (en) * 2017-05-12 2017-07-07 西南石油大学 A kind of tool-face positioner
US9976407B2 (en) 2013-09-11 2018-05-22 Reeves Wireline Technologies Limited Logging tool and method of use
CN110725654A (en) * 2019-11-30 2020-01-24 孙庆云 Combined type sucker rod centralizer
CN112031677A (en) * 2020-11-05 2020-12-04 胜利油田固邦石油装备有限责任公司 Anti-deformation casing centralizer for oil exploitation

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EP0278730A2 (en) * 1987-02-13 1988-08-17 Tri-State Oil Tool Industries Inc. Hydraulic stabilizer for bore hole tool
US4830105A (en) * 1988-02-08 1989-05-16 Atlantic Richfield Company Centralizer for wellbore apparatus
GB2268769A (en) * 1992-07-17 1994-01-19 Kinley Corp Method and apparatus for running a mechanical roller arm centralizer through restricted well pipe
FR2697578A1 (en) * 1992-11-05 1994-05-06 Schlumberger Services Petrol Centerer for sounding.
GB2361488B (en) * 2000-04-20 2004-05-26 Sondex Ltd Roller centralizer for wireline tools
CN201031634Y (en) * 2007-04-25 2008-03-05 新疆石油管理局钻井工艺研究院 Radial variable casing tube centralizer
CN201943608U (en) * 2010-12-17 2011-08-24 中国石油天然气集团公司 Excessively-moved pipe centering device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0278730A2 (en) * 1987-02-13 1988-08-17 Tri-State Oil Tool Industries Inc. Hydraulic stabilizer for bore hole tool
US4830105A (en) * 1988-02-08 1989-05-16 Atlantic Richfield Company Centralizer for wellbore apparatus
GB2268769A (en) * 1992-07-17 1994-01-19 Kinley Corp Method and apparatus for running a mechanical roller arm centralizer through restricted well pipe
FR2697578A1 (en) * 1992-11-05 1994-05-06 Schlumberger Services Petrol Centerer for sounding.
GB2361488B (en) * 2000-04-20 2004-05-26 Sondex Ltd Roller centralizer for wireline tools
CN201031634Y (en) * 2007-04-25 2008-03-05 新疆石油管理局钻井工艺研究院 Radial variable casing tube centralizer
CN201943608U (en) * 2010-12-17 2011-08-24 中国石油天然气集团公司 Excessively-moved pipe centering device

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9976407B2 (en) 2013-09-11 2018-05-22 Reeves Wireline Technologies Limited Logging tool and method of use
CN104358527A (en) * 2014-10-15 2015-02-18 西南石油大学 Large plunger type reducing centralizer
US10287834B2 (en) 2014-12-24 2019-05-14 Reeves Wireline Technologies Limited Logging tool
GB2533779B (en) * 2014-12-24 2019-05-08 Reeves Wireline Tech Ltd A logging tool
GB2533779A (en) * 2014-12-24 2016-07-06 Reeves Wireline Tech Ltd A logging tool
CN104832113A (en) * 2015-04-29 2015-08-12 西安威盛电子科技股份有限公司 Self-adaptive down-hole hydraulic centering device and centering method thereof
CN105003211B (en) * 2015-07-01 2017-03-08 西南石油大学 A kind of self-advancing type the pressure of the drill applies instrument
CN105003211A (en) * 2015-07-01 2015-10-28 西南石油大学 Self-propelled drilling pressure applying tool
CN104912493A (en) * 2015-07-02 2015-09-16 西南石油大学 Hydraulic type anti-skidding bit feed tool
CN105275397A (en) * 2015-10-27 2016-01-27 西南石油大学 Remote-control diameter-variable stabilizer
CN105221084A (en) * 2015-10-29 2016-01-06 中国石油集团渤海钻探工程有限公司 A kind of Wedged hydraulic centralizing device
CN106930698A (en) * 2017-05-12 2017-07-07 西南石油大学 A kind of tool-face positioner
CN110725654A (en) * 2019-11-30 2020-01-24 孙庆云 Combined type sucker rod centralizer
CN110725654B (en) * 2019-11-30 2021-02-05 徐章翊 Combined type sucker rod centralizer
CN112031677A (en) * 2020-11-05 2020-12-04 胜利油田固邦石油装备有限责任公司 Anti-deformation casing centralizer for oil exploitation
CN112031677B (en) * 2020-11-05 2021-01-12 胜利油田固邦石油装备有限责任公司 Anti-deformation casing centralizer for oil exploitation

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