CN204200106U - A kind of hydraulic casing centralizer - Google Patents
A kind of hydraulic casing centralizer Download PDFInfo
- 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
- Authority
- CN
- China
- Prior art keywords
- central tube
- skeleton
- centralizer
- piston
- fluid cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000012530 fluid Substances 0.000 claims abstract description 30
- 210000002356 Skeleton Anatomy 0.000 claims abstract description 27
- 239000000945 filler Substances 0.000 claims abstract description 21
- 238000007906 compression Methods 0.000 claims abstract description 3
- 230000000875 corresponding Effects 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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
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).
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)
| 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 |
-
2014
- 2014-09-27 CN CN201420562617.8U patent/CN204200106U/en active Active
Cited By (1)
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| C14 | Grant of patent or utility model |