CN202745731U - Hydraulic centralizer - Google Patents
Hydraulic centralizer Download PDFInfo
- Publication number
- CN202745731U CN202745731U CN 201220338274 CN201220338274U CN202745731U CN 202745731 U CN202745731 U CN 202745731U CN 201220338274 CN201220338274 CN 201220338274 CN 201220338274 U CN201220338274 U CN 201220338274U CN 202745731 U CN202745731 U CN 202745731U
- Authority
- CN
- China
- Prior art keywords
- centralizer
- centralizing
- arm
- righting
- casing
- 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.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 claims description 3
- 239000004568 cement Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008602 contraction Effects 0.000 abstract description 2
- 230000001788 irregular Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 3
- 238000010008 shearing Methods 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 1
- 208000034656 Contusions Diseases 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses a water conservancy centralizer designs for the purpose that improves the sleeve pipe centering degree and reinforce the well cementation quality, is equipped with the chamber of rightting of taking central through-hole at water conservancy centralizer barrel outer wall promptly, the intracavity of righting sets up intercommunication water conservancy centralizer hydraulic pressure chamber, radial central through-hole, the intracavity of righting is connected the drum cover, is equipped with in the drum cover by the fixed arm of righting of shearing pin nail and prevents to right the spring that the arm returns and contract. When the hydraulic centralizer enters a well, the centralizing arm is in a contraction state, the casing string is low in descending resistance, after the casing string is descended to a preset position, cement is replaced and then the casing string is pressed, the shearing pin is cut off by the pressure of liquid in the casing, the centralizing arm is forced to extend outwards to the wall of the centralizing casing, and the purpose of improving the well cementation quality is achieved. The centralizer is provided with a plurality of centralizing arms, the centralizing action area is large, and the centralizing action is obvious. The expansion outer diameter of the hydraulic centralizer can be larger than the inner diameter of the upper layer of casing, and the centralizer can also achieve the centralizing effect on irregular and expanded boreholes. After the centralizing arm is expanded, the centralizing arm is possibly inserted into the stratum and also plays a certain role in pipe fixing.
Description
Technical field
The utility model relates to a kind of waterpower centralizer, belongs to oil exploitation downhole tool technical field.
Background technology
In horizontal well and high angle hole, because Action of Gravity Field, sleeve pipe deflection well lower end so that sleeve pipe lower end cement sheath is very thin, even does not have cement sheath, causes this local cementing quality poor.In order to improve cementing quality, entering all to be set with centralizer on the sleeve pipe of well, yet, the external diameter of centralizer is certain, can't guarantee casing centralization for the irregular well of hole diameter, and is large at the frictional resistance of inclination section bunch tube and well, be lowered to difficulty, affect cementing operation.Although ball centralizer can transfer the sliding friction between sleeve pipe and the well to rolling friction, reduce the partial frictional resistance, because its external diameter is larger, still be difficult to deal with problems at all.
Summary of the invention
The purpose of this utility model is to provide a kind of waterpower centralizer, be a kind of enter well easily, can the Effective Raise drilling fluid and the hydraulic centralizing device of cementing quality.
Concrete technical scheme of the present utility model is as follows:
Be provided with radially lifter cavity at the outer wall of waterpower centralizer cylindrical shell, be provided with in the lifter cavity and be communicated with waterpower centralizer central through hole hydraulic cavities, radially.Cylindrical sleeve is connected in the lifter cavity, and is provided with the sealing of joint face circle.Righting arm is fixed in the cylindrical sleeve by shear pin, is provided with the spring that prevents the righting arm retraction between righting arm inner face and lifter cavity bottom surface.
Righting arm was contraction state when the waterpower centralizer entered well, and hole diameter is less, and it is little that bunch tube is lowered to resistance.Centralizer is behind the precalculated position, and bruising behind the replacement cement is overlapped overpressure and cut off the righting arm shear pin, makes the stressed supporting positive cover tube wall that outwards extends to of righting arm, reaches the purpose that improves cementing quality.Centralizer is provided with a plurality of righting arms, and the centralizing function area is large, and thrust is strong, and less pressure just can hold up sleeve pipe, plays centralizing function.Centralizer expansion external diameter can greater than the internal diameter of last layer sleeve pipe, also can reach the effect of righting for the well of hole anomaly and hole enlargement.And possible insert into stratum after the righting arm expansion also plays certain solid pipe effect.
Description of drawings
Fig. 1 is waterpower centralizer structure schematic diagram.
Fig. 2 is structural representation after the expansion of waterpower centralizer righting arm.
The specific embodiment
With reference to Fig. 1 and 2 embodiment of the present utility model is further specified:
Embodiment:
On the outer wall of waterpower centralizer cylindrical shell 1, evenly be provided with three groups of (two every group) lifter cavities radially, be provided with connection waterpower centralizer central through hole hydraulic cavities, radially in the lifter cavity.Cylindrical sleeve 2 is threaded in the lifter cavity, and is provided with joint face O type circle sealing 4.Righting arm 3 is fixed in the cylindrical sleeve 2 by shear pin 6, is provided with the spring 5 that prevents righting arm 3 retractions between righting arm 3 inner faces and lifter cavity bottom surface.
The course of work of waterpower centralizer is as follows:
(1) requires to process each accessory according to accompanying drawing, assembling waterpower centralizer;
(2) require to connect waterpower centralizer and sleeve pipe according to laying, enter well with sleeve pipe;
(3) under the waterpower centralizer in the well behind the precalculated position, replace bruising behind the cement, the fluid pressure in the sleeve pipe cuts off shear pin, makes righting arm stressed to external expansion, reaches the righting sleeve pipe and improves the purpose of well cementation effect.
Claims (1)
1. waterpower centralizer is characterized in that:
The outer wall of waterpower centralizer cylindrical shell (1) is provided with lifter cavity radially, is provided with in the lifter cavity to be communicated with waterpower centralizer central through hole hydraulic cavities, radially; Cylindrical sleeve (2) is connected in the lifter cavity, and is provided with joint face circle sealing (4); Righting arm (3) is fixed in the cylindrical sleeve (2) by shear pin (6), is provided with the spring (5) that prevents righting arm (3) retraction between righting arm (3) inner face and lifter cavity bottom surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220338274 CN202745731U (en) | 2012-07-12 | 2012-07-12 | Hydraulic centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220338274 CN202745731U (en) | 2012-07-12 | 2012-07-12 | Hydraulic centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202745731U true CN202745731U (en) | 2013-02-20 |
Family
ID=47705148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220338274 Expired - Fee Related CN202745731U (en) | 2012-07-12 | 2012-07-12 | Hydraulic centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202745731U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437555A (en) * | 2016-09-27 | 2017-02-22 | 中国石油天然气股份有限公司 | Righting device and downhole operation process pipe column |
| CN107178320A (en) * | 2017-06-14 | 2017-09-19 | 中石化石油工程技术服务有限公司 | Hydraulic positioner |
| CN110080696A (en) * | 2019-06-04 | 2019-08-02 | 武汉金博锐精密制造有限公司 | A kind of novel hydropower centralizer |
| CN112780196A (en) * | 2019-11-08 | 2021-05-11 | 中国石油天然气股份有限公司 | Casing centralizer and casing installation method |
| CN112878961A (en) * | 2021-01-25 | 2021-06-01 | 大庆油田有限责任公司 | Injection tool for descaling high-pressure water jet casing |
-
2012
- 2012-07-12 CN CN 201220338274 patent/CN202745731U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437555A (en) * | 2016-09-27 | 2017-02-22 | 中国石油天然气股份有限公司 | Righting device and downhole operation process pipe column |
| CN107178320A (en) * | 2017-06-14 | 2017-09-19 | 中石化石油工程技术服务有限公司 | Hydraulic positioner |
| CN107178320B (en) * | 2017-06-14 | 2023-09-08 | 中石化石油工程技术服务有限公司 | Hydraulic positioner |
| CN110080696A (en) * | 2019-06-04 | 2019-08-02 | 武汉金博锐精密制造有限公司 | A kind of novel hydropower centralizer |
| CN112780196A (en) * | 2019-11-08 | 2021-05-11 | 中国石油天然气股份有限公司 | Casing centralizer and casing installation method |
| CN112878961A (en) * | 2021-01-25 | 2021-06-01 | 大庆油田有限责任公司 | Injection tool for descaling high-pressure water jet casing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202745731U (en) | Hydraulic centralizer | |
| CN202031482U (en) | Square piston type anchoring and chambering drilling rig | |
| CN102996089B (en) | Multi-stage hydraulic expansion tail pipe suspension system with reducing expansion cone for horizontal well for thermal recovery of heavy oil | |
| CN103334699B (en) | Coal mine underground coal bed drilling and cave-building device and method of use | |
| CN100538003C (en) | The expansion sieve tube hanging method | |
| CN103556950A (en) | Large changing diameter double-drag-blade hole reaming drill | |
| CN208605166U (en) | One kind can bore pitching press-fracturing bridge plug | |
| CN202882841U (en) | Pipe external packer capable of being self-expandable when encountering water or oil | |
| CN202500524U (en) | Hydraulic-pressure removable packer | |
| CN202946103U (en) | Half-path well-cementing stage cementing device without drilling inner sleeve | |
| CN203742505U (en) | Floating ball and float collar type prestress well cementation ground anchor assembly | |
| CN203716919U (en) | Open hole packer | |
| CN202745730U (en) | hydraulic centralizer | |
| CN202970565U (en) | Thickened oil thermal recovery horizontal well multistage hydraulic pressure expansion tail pipe suspension system with variable diameter expansion cone | |
| CN103670326B (en) | Open hole packer | |
| CN201705216U (en) | Clamp spring type salvageable bottom plug for expansion pipe | |
| CN203742506U (en) | Forcing float collar type prestressing force well cementation ground anchor assembly | |
| CN203008808U (en) | Casing centralizer with variable diameter and rotational flow function | |
| CN103726808A (en) | Hydraulic sleeve scraper | |
| CN104963640A (en) | Horizontal well coiled tubing lock type hydraulic bit feeding and alarming system | |
| CN202215193U (en) | Water-swelling self-sealing type packer | |
| CN204941439U (en) | A kind of wedging packer | |
| CN106150387B (en) | Hinged transmission shaft assembly for screw drill | |
| CN104564115A (en) | Sleeve-type inside anchor | |
| CN201610730U (en) | Hydraulic expansion shaping device for casing of casing deformation well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130220 Termination date: 20210712 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |