CN103899258A - Insert type casing slip - Google Patents
Insert type casing slip Download PDFInfo
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- CN103899258A CN103899258A CN201210585594.8A CN201210585594A CN103899258A CN 103899258 A CN103899258 A CN 103899258A CN 201210585594 A CN201210585594 A CN 201210585594A CN 103899258 A CN103899258 A CN 103899258A
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- casing slip
- casing
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- insert type
- slips
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Abstract
The invention discloses an insert type casing slip. The insert type casing slip comprises at least one small casing slip body and a large casing slip body, and the small casing slip bodies are fixed outside the large casing slip body. The large casing slip body comprises a shell which is provided with a sawtooth fastener and at least one groove, and a through hole is formed in each groove. At least one shear pin hole is formed in the shell and used for mounting a shear pin to enable the large casing slip body to be fixed on a hanging packer. Each small casing slip body comprises a body, a sawtooth fastener is arranged on the upper surface of each body, a barb is connected to the lower surface of each body, one body is embedded in each groove, and each barb is clamped in the through hole of each groove. The insert type casing slip can be meshed with the casing wall more deeply, and use reliability of the hanging packer can be improved greatly by the adoption of the structure, so that reliability in acid fracturing and yield-increasing construction is improved, and construction risk is lowered greatly.
Description
Technical field
The present invention relates to field of petroleum exploitation, particularly a kind of block insert type casing slip.
Background technology
In order to improve oil, gas recovery ratio, oil field at home is more and more valued the drilling mode of horizontal well, and in the completion mode of horizontal well, a lot of well selection level well subsection acidizing pressure break barefoot completion modes again, in enforcement acid fracturing volume increase work progress, hanging packer requires to bear high pressure stable being anchored on sleeve pipe of energy, and slips is to realize the key components and parts that bears high pressure and grappling sleeve pipe on hanging packer.Slips need to break under the promotion of piston, extruding, and now the piston device that is locked is fixed, and is anchored on sleeve pipe thereby realize hanging packer.In pressing crack construction process, tubing string can ceaselessly shake, so slips requires to have concurrently the feature frangible, hardness is high and wear-resisting.
Traditional slips is the ironcasting of integral type or split-type, and the hardness of this ironcasting after heat treatment approaches the hardness of casing wall.On existing hanging packer, configure two traditional slips, be lowered into after design attitude at instrument, suppress by managing, after forcing piston to cut off pin, move, realize cast iron slips by extruding and break, until piston be locked device fixing after, realize hanging packer and be anchored on the task on sleeve pipe.
Because the hardness of traditional cast iron slips finished product and the hardness of sleeve pipe approach, there is following shortcoming:
1, the depth as shallow of traditional cast iron slips and casing wall interlock, affects the fastness of hanging packer grappling sleeve pipe;
2, the hardness of traditional slips and the hardness of sleeve pipe approach, and cause the abrasion resistance of slips bad, and increase production the state of tubing string in vibrations in construction at acid fracturing, are easy to like this slips wearing and tearing, cause grappling to be lost efficacy, thereby have reduced construction reliability.
Summary of the invention
The object of the embodiment of the present invention is the defect for above-mentioned prior art, provides a kind of abrasion resistance good, and can improve the block insert type casing slip of acid fracturing volume increase construction reliability.
The technical scheme that the present invention takes is to achieve these goals:
A kind of block insert type casing slip, comprises small casing slips and large casing slip, and the outer fixed cover of described large casing slip is provided with small casing slips described at least one.
The material of described large casing slip is cast iron, and the material of described small casing slips is bearing steel.
, described large casing slip comprises shell, and described shell is provided with sawtooth button and at least one groove, and each described groove is provided with through hole; Described shell is provided with at least one shear pin hole, and for shear pin is installed, described shear pin is fixed on hanging packer large casing slip; Described small casing slips comprises body, and described body upper surface is provided with sawtooth button, and described body soffit is connected with barb, and each described groove is embedded in a described body, and described barb snaps in the through hole of described groove.
The body upper surface of described small casing slips is positioned at the outside of described groove.
Described groove is rectangle, and the body of the corresponding described small casing slips embedding is rectangle.
Described groove is 6, and every two grooves are adjacent, and are a pair of, between every pair of groove, are provided with gap, and the shell in described gap is provided with shear pin hole, and 3 pairs of grooves are evenly distributed in the surrounding of described shell, and described small casing slips is 6.
Described shell is provided with at least one finedraw.
Described shell is provided with U-shaped groove.
Described shell upper is provided with 9 finedraws, and the shell of described finedraw bottom is provided with U-shaped groove.
Described large casing slip and described small casing slips are fixed together by counterbore screw.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
Block insert type casing slip of the present invention is taking cast iron slips as matrix, and in matrix, to be bumped into material be Gr15(bearing steel) small casing slips, Bearing Steel is higher, contacting fatigue resistance is better, therefore in acid fracturing volume increase construction, in the situation of tubing string vibrations, also can ensure that slips has good abrasion resistance, block insert type casing slip can be darker with the degree of depth of casing wall interlock, adopt structure of the present invention can greatly improve the reliability that hanging packer uses simultaneously, thereby improve acid fracturing volume increase construction reliability, greatly reduce construction risk.
Brief description of the drawings
Fig. 1 is the structural representation of block insert type casing slip provided by the invention;
Fig. 2 is the lateral view of Fig. 1;
Fig. 3 is the top view of Fig. 1;
Fig. 4 is the structural representation of large casing slip provided by the invention;
Fig. 5 is the lateral view of Fig. 1;
Fig. 6 is the structural representation of small casing slips provided by the invention;
Fig. 7 is the lateral view of Fig. 1;
Fig. 8 is the top view of Fig. 1;
Fig. 9 is the structural representation that block insert type casing slip provided by the invention and hanging packer are assembled together.
In figure:
1 large casing slip, 10 shells, 11 first sawtooth buttons, 12 grooves, 13 through holes, 14 finedraws, 15U connected in star, 16 first screw holes, 17 shear pin holes;
2 small casing slips, 20 bodies, 21 second sawtooth buttons, 22 barbs, 23 second screw holes;
3 counterbore screws;
4 hanging packers;
5 shear pins.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Referring to Fig. 1, Fig. 2 and Fig. 3, a kind of block insert type casing slip, comprises small casing slips 2 and large casing slip 1, and the large outer fixed cover of casing slip 1 is provided with at least one small casing slips 2.
As preferably, the material of large casing slip 1 is cast iron, and the material of small casing slips 2 is bearing steel.
Referring to Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8; large casing slip 1 comprises shell 10; shell 10 is provided with first sawtooth button 11 and at least one groove 12; each groove 12 is provided with through hole 13; shell 10 is provided with at least one shear pin hole 17; be used for installing shear pin, shear pin is fixed on hanging packer large casing slip 1; Small casing slips 2 comprises body 20, and body 20 upper surfaces are provided with the second sawtooth button 21, and body 20 soffits are connected with barb 22, and each groove 12 is embedded in a body 20, and barb 22 snaps in the through hole 13 of groove 12.
Referring to Fig. 1 and Fig. 2, body 20 upper surfaces of small casing slips 2 are positioned at the outside of groove 12.It is the upper surface that body 20 upper surfaces exceed shell 10.
Referring to Fig. 5 and Fig. 8, groove 12 is rectangle, and groove 12 bottoms are arc, and the body 20 of the corresponding small casing slips 2 embedding is rectangle.The bottom coordinating with groove 12 is arc.
Referring to Fig. 2 and Fig. 3, groove 12 is 6, every two grooves are adjacent, and be a pair of, between every pair of groove 12, being provided with gap, the shell 10 in described gap is provided with shear pin hole 17,3 pairs of grooves 12 are evenly distributed in the surrounding of shell 10, accordingly, small casing slips 2 is 6, is evenly distributed in the surrounding of shell 10.
Small casing slips its hardness after Overheating Treatment, much larger than sleeve pipe hardness and hardness of cast, keeps the surface of small casing Carvalho above large casing slip shell when design.
When work, hanging packer entirety is in sleeve pipe the inside, in the global design of hanging packer, the external diameter of slips is the maximum outside diameter (can find out in figure) that is less than instrument generally, if so large casing slip is not by the throw-out collar on side, be that slope racks and splits, small casing slips does not reach sleeve pipe, and large casing slip is assemblied on the throw-out collar of hanging packer, in the idle situation of whole hanging packer, large casing slip does not reach sleeve pipe.In the time of hanging packer work, the extruding that moves through of piston is broken large casing slip, small casing slips also can squeezedly break in touching casing wall, large casing slip after breaking is expanded to surrounding, ensure the first contact sleeve tube wall of small casing slips, realize hanging packer mainly by small casing slips anchoring sleeve pipe.
Referring to Fig. 2, shell 10 is provided with at least one finedraw 14.Shell 10 is provided with U-shaped groove 15.As preferably, shell 10 tops are provided with 9 finedraws 14, and the shell 10 of finedraw 14 bottoms is provided with U-shaped groove 16.Between two grooves 12 of every centering, be provided with a U-shaped groove 16, between every pair of groove 12, be provided with two U-shaped grooves 16.
Finedraw and U-shaped groove are set, and U-shaped groove makes shell wall attenuation, makes large casing slip be easy to break.
Referring to Fig. 1, Fig. 4 and Fig. 6, for ease of connecting, large casing slip 1 is fixed together by counterbore screw 3 with small casing slips 2.Large casing slip 1 is provided with the first screw hole 16, and small casing slips 2 is provided with the second screw hole 23.The first screw hole 16 is corresponding with the second screw hole 23, for counterbore screw 3 is installed.
Referring to Fig. 9, when assembling, 6 small casing slips 2 are put into respectively to 6 corresponding grooves on large casing slip 1 outer wall, then use respectively counterbore screw 3 fastening, large casing slip 1 is fixed together with small casing slips 2, completes the assembling of block insert type casing slip.In assembling hanging packer 4, only original slips need be replaced by the block insert type casing slip assembling, shear pin 5 is through the shear pin hole on large casing slip 1, large casing slip 1 is assembled together with hanging packer 4, complete entirety assembling, hanging packer 4 assembles two block insert type casing slips.
Due to the Gr15(bearing steel of small casing slips employing of the present invention), so block insert type casing slip can be darker with the degree of depth of casing wall interlock when hanging packer work, the in the situation that tubing string shaking in acid fracturing volume increase construction simultaneously, also ensure good abrasion resistance, for acid fracturing volume increase construction provides sound assurance, greatly reduce construction risk.Block insert type casing slip of the present invention has the advantage frangible, hardness is high and wear-resisting concurrently.
The rational material selection of the present invention, has realized product cost low, and has the feature frangible, hardness is high and wear-resisting concurrently; Adopt bearing steel and corresponding structure design, make the degree of depth of slips interlock darker, because Bearing Steel is greater than the hardness of casing wall, the ability of the large interlock of hardness is dark, structure design is mainly that the small casing Carvalho of On The Quality of Bearing Steels exceeds ironcasting height, and small casing slips is stressed more concentrated like this.Adopt structure design of the present invention, do not affecting in the integrally-built situation of hanging packer, realize taking Gr15(bearing steel) part as main, ironcasting be the higher anchoring structure of auxiliary reliability.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a block insert type casing slip, is characterized in that, comprises small casing slips and large casing slip, and the outer fixed cover of described large casing slip is provided with small casing slips described at least one.
2. block insert type casing slip according to claim 1, is characterized in that, the material of described large casing slip is cast iron, and the material of described small casing slips is bearing steel.
3. block insert type casing slip according to claim 2, is characterized in that, described large casing slip comprises shell, and described shell is provided with sawtooth button and at least one groove, and each described groove is provided with through hole; Described shell is provided with at least one shear pin hole, and for shear pin is installed, described shear pin is fixed on hanging packer large casing slip; Described small casing slips comprises body, and described body upper surface is provided with sawtooth button, and described body soffit is connected with barb, and each described groove is embedded in a described body, and described barb snaps in the through hole of described groove.
4. block insert type casing slip according to claim 3, is characterized in that, the body upper surface of described small casing slips is positioned at the outside of described groove.
5. block insert type casing slip according to claim 4, is characterized in that, described groove is rectangle, and the body of the corresponding described small casing slips embedding is rectangle.
6. block insert type casing slip according to claim 5, it is characterized in that, described groove is 6, every two grooves are adjacent, and be a pair of, between every pair of groove, being provided with gap, the shell in described gap is provided with shear pin hole, 3 pairs of grooves are evenly distributed in the surrounding of described shell, and described small casing slips is 6.
7. block insert type casing slip according to claim 1, is characterized in that, described shell is provided with at least one finedraw.
8. block insert type casing slip according to claim 6, is characterized in that, described shell is provided with U-shaped groove.
9. block insert type casing slip according to claim 1, is characterized in that, described shell upper is provided with 9 finedraws, and the shell of described finedraw bottom is provided with U-shaped groove.
10. according to the block insert type casing slip described in claim 1-9 any one, it is characterized in that, described large casing slip and described small casing slips are fixed together by counterbore screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210585594.8A CN103899258B (en) | 2012-12-28 | 2012-12-28 | A kind of block insert type casing slip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210585594.8A CN103899258B (en) | 2012-12-28 | 2012-12-28 | A kind of block insert type casing slip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103899258A true CN103899258A (en) | 2014-07-02 |
| CN103899258B CN103899258B (en) | 2016-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210585594.8A Active CN103899258B (en) | 2012-12-28 | 2012-12-28 | A kind of block insert type casing slip |
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| CN (1) | CN103899258B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756596A (en) * | 2014-12-17 | 2016-07-13 | 中国石油天然气股份有限公司 | Slip structure and bridge plug assembly provided with same |
| CN105952412A (en) * | 2016-06-23 | 2016-09-21 | 宝鸡市元亨石油设备有限责任公司 | Saw tooth slip |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030196794A1 (en) * | 2002-04-18 | 2003-10-23 | Sommers Michael T. | Slip spring with heel notch |
| CN101963048A (en) * | 2010-10-15 | 2011-02-02 | 镇江安达煤矿专用设备有限公司 | Split slip sleeve |
| CN102575507A (en) * | 2010-08-09 | 2012-07-11 | 哈里伯顿能源服务公司 | Expansion device |
| CN102561991A (en) * | 2012-01-18 | 2012-07-11 | 中国石油天然气股份有限公司 | Small-diameter hydrostatic setting plug |
| CN202560158U (en) * | 2012-05-18 | 2012-11-28 | 中国石油天然气股份有限公司 | Drillable combined bridge plug |
| CN203161119U (en) * | 2012-12-28 | 2013-08-28 | 安东石油技术（集团）有限公司 | Insert type casing slip |
-
2012
- 2012-12-28 CN CN201210585594.8A patent/CN103899258B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030196794A1 (en) * | 2002-04-18 | 2003-10-23 | Sommers Michael T. | Slip spring with heel notch |
| CN102575507A (en) * | 2010-08-09 | 2012-07-11 | 哈里伯顿能源服务公司 | Expansion device |
| CN101963048A (en) * | 2010-10-15 | 2011-02-02 | 镇江安达煤矿专用设备有限公司 | Split slip sleeve |
| CN102561991A (en) * | 2012-01-18 | 2012-07-11 | 中国石油天然气股份有限公司 | Small-diameter hydrostatic setting plug |
| CN202560158U (en) * | 2012-05-18 | 2012-11-28 | 中国石油天然气股份有限公司 | Drillable combined bridge plug |
| CN203161119U (en) * | 2012-12-28 | 2013-08-28 | 安东石油技术（集团）有限公司 | Insert type casing slip |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756596A (en) * | 2014-12-17 | 2016-07-13 | 中国石油天然气股份有限公司 | Slip structure and bridge plug assembly provided with same |
| CN105952412A (en) * | 2016-06-23 | 2016-09-21 | 宝鸡市元亨石油设备有限责任公司 | Saw tooth slip |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103899258B (en) | 2016-07-06 |
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Effective date of registration: 20190103 Address after: 300450 No. 309, Second Street, Central and South China, West Binhai New Area, Tianjin Patentee after: Tianjin An Dong petroleum machinery Manufacturing Co., Ltd Address before: 100102 No. 8 Pingcui West Road, Donghuqu, Chaoyang District, Beijing Patentee before: Anton Oilfield Services (Group) Ltd. |