CN204200106U - A kind of hydraulic casing centralizer - Google Patents

A kind of hydraulic casing centralizer Download PDF

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Publication number
CN204200106U
CN204200106U CN201420562617.8U CN201420562617U CN204200106U CN 204200106 U CN204200106 U CN 204200106U CN 201420562617 U CN201420562617 U CN 201420562617U CN 204200106 U CN204200106 U CN 204200106U
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CN
China
Prior art keywords
central tube
skeleton
centralizer
piston
fluid cylinder
Prior art date
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Active
Application number
CN201420562617.8U
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Chinese (zh)
Inventor
彭志刚
赵勇
冯德杰
张建国
徐鑫
李国锋
张磊
许婵婵
李伟
肖经纬
马明新
陶剑
邹晓敏
董恩博
邵茹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Petrochemical Corp
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Original Assignee
China Petrochemical Corp
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
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Application filed by China Petrochemical Corp, Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp filed Critical China Petrochemical Corp
Priority to CN201420562617.8U priority Critical patent/CN204200106U/en
Application granted granted Critical
Publication of CN204200106U publication Critical patent/CN204200106U/en
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Abstract

The utility model relates to a kind of hydraulic casing centralizer in downhole tool field, comprise central tube (2) and be enclosed within the outside centralizer body of central tube (2), wherein: described centralizer body comprises the fluid cylinder (3) be connected with central tube (2), the piston (6) be arranged in fluid cylinder (3), the skeleton (11) coordinated with piston (6) axial compression and the lower filler ring (14) of fixing skeleton (11) other end on central tube (2), central tube (2) place that piston (6) inner hydraulic face is corresponding is provided with hydraulic pressure hole (4).This hydraulic casing centralizer, suppresses mode by well head and skeleton is swelled to surrounding, supports the borehole wall, effectively can improve drilling fluid, improves cementing quality.

Description

A kind of hydraulic casing centralizer
Technical field
The utility model relates to a kind of casing stabbing board in petroleum oil well completion technical field of tools, particularly a kind of hydraulic casing centralizer.
Background technology
Horizontal well technology can increase the drainage area of oil reservoir, improves oil and gas production, obtains large scale application in recent years.But horizontal segment cementing quality difference is a technical barrier of puzzlement horizontal well development always, tracing it to its cause, it is poor to be mainly horizontal segment drilling fluid, causes the cement sheath uneven distribution formed after cementing the well, affects packing effect.The method of the section of improving the standard drilling fluid is for install casing stabbing board additional at horizontal segment at present, mainly comprises elastic centralizer and rigid centralizer, and elastic centralizer bearing capacity is weak, is difficult to effective righting sleeve pipe, and rigid centralizer external diameter is large, under enter difficulty.
Summary of the invention
In order to overcome the defect in common elastic centralizer and rigid centralizer application process, meet the righting demand of horizontal well horizontal segment sleeve pipe, the utility model provides a kind of hydraulic casing centralizer, this hydraulic casing centralizer can with completion tubular column safety, successfully enter down, the effectively section of improving the standard drilling fluid, thus the section of improving the standard cementing quality.
The utility model solves the technical scheme that its technical problem adopts:
A kind of hydraulic casing centralizer, comprise central tube 2 and the centralizer body being enclosed within central tube 2 outside, wherein: described centralizer body comprises the fluid cylinder 3 be connected with central tube 2, the piston 6 be arranged in fluid cylinder 3, the skeleton 11 coordinated with piston 6 axial compression and the lower filler ring 14 of fixing skeleton 11 other end on central tube 2, central tube 2 place that piston 6 inner hydraulic face is corresponding is provided with hydraulic pressure hole 4.
Such scheme also comprises: extrude joint portion at piston 6 and skeleton 11 and be connected filler ring 8, and upper filler ring 8 is connected by radial pin 7 with fluid cylinder 3 end.
Such scheme comprises further: skeleton 11 inwall is provided with square groove 10 and 12, and skeleton 11 outer wall is provided with circular groove 9 and 13.
Skeleton 11 two ends and upper filler ring 8, lower filler ring 14 are all threaded connection, and central tube 2 and fluid cylinder 3 are connected by screw thread.
Sealing ring is equipped with the bonding surface of central tube 2 and fluid cylinder 3 at central tube 2 and fluid cylinder 3 bonding surface, piston 6.
During this hydraulic casing centralizer completion practice, this hydraulic casing centralizer is with bunch tube G.I.H.Under behind precalculated position, suppress in pipe string from well head, drilling fluid enters in fluid cylinder chamber from the inlet opening central tube, when fluid cylinder cavity pressure reach pin cut off force value time, pin is cut off, and piston promotes upper filler ring, skeleton upper end is moved together, because skeleton lower end is stationary state, skeleton to the distortion of surrounding protuberance, will be supported on the borehole wall, reaches the effect of righting sleeve pipe.
The utility model has following beneficial effect: (1) this hydraulic casing centralizer external diameter is little, can with completion tubular column safety, successfully enter down; (2) skeleton is after the distortion of surrounding protuberance, and external diameter is large, bearing capacity is strong, can the effective section of improving the standard drilling fluid.
Accompanying drawing explanation
Accompanying drawing is structural representation of the present utility model.
In figure, 1. top connections, 2. central tube, 3. fluid cylinder, 4. inlet opening, 5. sealing ring, 6. piston, 7. pin, 8. go up filler ring, 9. circular groove, 10. square groove, 11. skeletons, 12. square grooves, 13. circular grooves, 14. times filler rings, 15. lower contacts.
Detailed description of the invention
Below in conjunction with Figure of description, the utility model is further described:
As shown in drawings, this hydraulic casing centralizer comprises top connection (1), central tube (2), fluid cylinder (3), inlet opening (4), sealing ring (5), piston (6), pin (7), upper filler ring (8), skeleton (11), circular groove (9) (13), square groove (10) (12), lower filler ring (14) and lower contact (15).Inlet opening (4) is positioned on central tube (2).Fluid cylinder (3) and central tube (2) are threaded connection, and fluid cylinder (3) is connected by pin (7) with upper filler ring (8), and fluid cylinder (3) and piston (6) realize sealing by sealing ring (5).Skeleton (11) two ends are threaded connection with upper filler ring (8), lower filler ring (14) respectively.Skeleton (11) outer wall is provided with circular groove (9) (13), and skeleton (11) inwall is provided with square groove (10) (12).Lower filler ring (14) and central tube (2) are threaded connection.
During completion practice, this hydraulic casing centralizer is with bunch tube G.I.H.Under behind precalculated position, suppress in pipe string from well head, drilling fluid enters in fluid cylinder (3) chamber from the inlet opening (4) central tube (2), when fluid cylinder (3) cavity pressure reach pin (7) cut off force value time, pin (7) is cut off, and in piston (6) promotion, filler ring (8), skeleton (11) upper end are moved together, because skeleton (11) lower end is stationary state, skeleton (11) to the distortion of surrounding protuberance, will be supported on the borehole wall, reaches the effect of righting sleeve pipe.

Claims (5)

1. a hydraulic casing centralizer, comprise central tube (2) and be enclosed within the outside centralizer body of central tube (2), it is characterized in that: described centralizer body comprises the fluid cylinder (3) be connected with central tube (2), the piston (6) be arranged in fluid cylinder (3), the skeleton (11) coordinated with piston (6) axial compression and the lower filler ring (14) of fixing skeleton (11) other end on central tube (2), and central tube (2) place that wherein piston (6) inner hydraulic face is corresponding is provided with hydraulic pressure hole (4).
2. hydraulic casing centralizer according to claim 1, is characterized in that: extrude joint portion at piston (6) and skeleton (11) and be connected filler ring (8), and upper filler ring (8) is connected by radial pin (7) with fluid cylinder (3) end.
3. hydraulic casing centralizer according to claim 2, is characterized in that: skeleton (11) inwall is provided with square groove (10) and square groove (12), and skeleton (11) outer wall is provided with circular groove (9) and circular groove (13).
4. the hydraulic casing centralizer according to claim 1 or 2,3, is characterized in that: skeleton (11) two ends and upper filler ring (8), lower filler ring (14) are all threaded connection, and central tube (2) and fluid cylinder (3) are connected by screw thread.
5. hydraulic casing centralizer according to claim 4, is characterized in that: be equipped with sealing ring at central tube (2) and fluid cylinder (3) bonding surface, piston (6) with the bonding surface of central tube (2) and fluid cylinder (3).
CN201420562617.8U 2014-09-27 2014-09-27 A kind of hydraulic casing centralizer Active CN204200106U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420562617.8U CN204200106U (en) 2014-09-27 2014-09-27 A kind of hydraulic casing centralizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420562617.8U CN204200106U (en) 2014-09-27 2014-09-27 A kind of hydraulic casing centralizer

Publications (1)

Publication Number Publication Date
CN204200106U true CN204200106U (en) 2015-03-11

Family

ID=52658075

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420562617.8U Active CN204200106U (en) 2014-09-27 2014-09-27 A kind of hydraulic casing centralizer

Country Status (1)

Country Link
CN (1) CN204200106U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106639912A (en) * 2015-10-30 2017-05-10 中石化石油工程技术服务有限公司 Hydraulic type rigid sleeve centralizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106639912A (en) * 2015-10-30 2017-05-10 中石化石油工程技术服务有限公司 Hydraulic type rigid sleeve centralizer

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