CN103899272A - Suspended packer - Google Patents
Suspended packer Download PDFInfo
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- CN103899272A CN103899272A CN201210586757.4A CN201210586757A CN103899272A CN 103899272 A CN103899272 A CN 103899272A CN 201210586757 A CN201210586757 A CN 201210586757A CN 103899272 A CN103899272 A CN 103899272A
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Abstract
The invention discloses a suspended packer. The suspended packer comprises two insert type casing slips, wherein one insert type casing slip is installed between a second cone and a second piston, and the other insert type casing slip is installed between a first cone and a first piston. Each insert type casing slip comprises at least one small casing slip and a large casing slip, wherein the large casing slip is fixedly sleeved with the small casing slip. The suspended packer can be meshed with the wall of a casing pipe more deeply. By the adoption of the structure, use reliability of the suspended packer is largely improved, and accordingly construction reliability of acid fracturing increase production is improved, and construction risks are largely reduced.
Description
Technical field
The present invention relates to field of petroleum exploitation, particularly a kind of hanging packer.
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 slips abrasion resistance good, firmly hanging packer of grappling sleeve pipe.
The technical scheme that the present invention takes is to achieve these goals:
A kind of hanging packer, comprises two block insert type casing slips, and a described block insert type casing slip is arranged between the second cone and the second piston, and described in another, block insert type casing slip is arranged between the first cone and first piston;
Described 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, for shear pin is installed, large casing slip is fixed on hanging packer; 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 in hanging packer 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, greatly improve the reliability that hanging packer uses, thereby improve acid fracturing volume increase construction reliability, greatly reduce construction risk.
Brief description of the drawings
Fig. 1 is that the structure of a kind of hanging packer of invention is partly cutd open figure;
Fig. 2 is the structural representation of another kind of hanging packer provided by the invention;
Fig. 3 is the structural representation of block insert type casing slip provided by the invention;
Fig. 4 is the lateral view of Fig. 3;
Fig. 5 is the top view of Fig. 3;
Fig. 6 is the structural representation of large casing slip provided by the invention;
Fig. 7 is the lateral view of Fig. 6;
Fig. 8 is the structural representation of small casing slips provided by the invention;
Fig. 9 is the lateral view of Fig. 8;
Figure 10 is the top view of Fig. 8.
In Fig. 2-10:
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 block insert type casing slips;
5 shear pins;
6 second cones;
7 second pistons;
8 first cones;
9 first pistons.
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.
Fig. 1 is that the structure of the two-way setting hanging packer of invention is partly cutd open figure.As shown in Figure 1, two-way setting hanging packer, comprise central tube 2, one end of central tube 2 connects the first joint 1, the other end connects the second joint 20, on central tube 2, overlap successively and have the first locating snap ring 21 from the first joint 1 to second joint 20, first piston 4, the first slips 7, the first cone 9, the first packing element pressure ring 10, packing element 12, the second packing element pressure ring 14, the second cone 15, the second slips 22, the second piston 16 and the second locating snap ring 18, wherein the outside of first piston 4 cover has the first hydraulic cylinder 3, one end of the first hydraulic cylinder 3 and the first joint 1 are tightly connected, the first hydraulic cylinder 3 is by the first locating snap ring 21 and central tube 2 axial restraints, between first piston 4 and the first hydraulic cylinder 3 and central tube 2, slipper seal is connected, between first piston 4 and central tube 2, be provided with the first shear pin 6, the inner surface of first piston 4 has dentation slip insert, on central tube 2, be fixed with and stop first alive 4 to fill in the first locking slips 5 moving to the first joint 1, fixing by pin 8 between the first slips 7 and the first cone 9, between central tube 2 and packing element 12, be provided with support ring 13, support ring 13 is positioned at packing element 12 middle parts, the two ends that the first packing element pressure ring 10 and the second packing element pressure ring 14 entangle respectively packing element 12, the outside cover of the second piston 16 has the second hydraulic cylinder 19, one end of the second hydraulic cylinder 19 and the second joint 20 are tightly connected, the second hydraulic cylinder 19 is by the second locating snap ring 18 and central tube 2 axial restraints, between the second piston 16 and the second hydraulic cylinder 20 and central tube 2, slipper seal is connected, between the second piston 16 and central tube 2, be connected by the second shear pin 23, the inner surface of the second piston 16 has dentation slip insert, on central tube 2, be fixed with the second locking slips 17 that stops the second piston 16 to move to the second joint 20, on central tube 2, there is the first pressure transmission hole 24 and the second pressure transmission hole 25 radially, the first pressure transmission hole 24 is between the first locating snap ring 21 and first piston 4, the second pressure transmission hole 25 is between the second locating snap ring 18 and the second piston 16.Packer of the present invention adopts O-ring seals 27 to seal, as between the first joint and the first hydraulic cylinder, between first piston and the first hydraulic cylinder and central tube, between the second joint and the second hydraulic cylinder, all seal by O-ring seals 27 is set between the second piston and the second hydraulic cylinder and central tube.Concrete set-up mode can be consulted Fig. 1.The two ends of central tube 2 have respectively stopping step (see in figure and encircle with the first stop 21 and the second locating snap ring 18 contact sites), stop respectively the first locating snap ring 21 and the second locating snap ring 18 mobile to central tube middle part.The conical surface of the second cone 15 stretches in the second slips 22, and the conical surface of the first cone 9 stretches in the first slips 7.Realize two slips and break, be reliably effectively anchored on sleeve pipe.The inner surface of the second cone 15 has dentation slip insert, is fixed with the 3rd locking slips 26 that stops the second cone 15 to move to the second joint 20 on central tube 2.The two ends of packing element 12 are overlapped respectively soft metal ring 11.Ensure that the first packing element pressure ring 10 and the second packing element pressure ring 14 can stably push down the two ends of packing element 12.The first joint 1 is female joint, and the second joint 20 is male joint.Between central tube 2 and the first joint 1 and the second joint 20 for being threaded.
The preparation method of above-mentioned packer, comprises the steps:
A. be ready to required parts;
B. support ring is packed in packing element, then the first packing element pressure ring and the second packing element pressure ring are enclosed within respectively to the two ends of packing element, then above-mentioned assembly cover is installed to the middle part of central tube;
C. be inserted in respectively the first cone, the second cone from the two ends of central tube, and the first slips and the second slips, entangling the conical surface of the first cone to the first slips, the second slips entangles the conical surface of the second cone;
D. in the corresponding groove on central tube, be respectively charged into the first locking slips and the second locking slips, be then inserted in respectively first piston and the second piston at the two ends of central tube;
E. the first locating snap ring is assembled in the groove in the first hydraulic cylinder, then the first hydraulic cylinder is inserted in to first piston, be stuck until the first locating snap ring reaches stopping step; Equally, the second locating snap ring is assembled in the groove in the second hydraulic cylinder, then the second hydraulic cylinder is inserted in to the second piston, be stuck until the second locating snap ring reaches stopping step;
F. the first joint and the second joint are connected respectively to the two ends of central tube by screw thread, then use the first shear pin and the second shear pin respectively first piston and the second piston and central tube to be fixed;
Wherein, before assembling, on the first joint, on the second section header, the surfaces externally and internally of first piston and the surfaces externally and internally of the second piston fit on O-ring seals respectively.
Further, in step b, the two ends of described packing element first put respectively soft metal ring, and then the first packing element pressure ring and the second packing element pressure ring are enclosed within respectively to the two ends of packing element.
The pit shaft hoop packing method that uses above-mentioned packer, comprises the steps:
A. by above-mentioned packer access completion tubular column, the second joint of wherein said packer is by the pit shaft barrier valve of oil pipe connecting band ball seat, and the first joint is connected with oil pipe or drilling rod;
B. described packer is delivered to downhole designs position, drop into setting ball to the ball seat of pit shaft barrier valve by drilling rod or oil pipe;
C. suppress from oil pipe or drilling rod, pressure is delivered to respectively on first piston and the second piston by the first pressure transmission hole on central tube and the second pressure transmission hole, when pressure reaches after shear force, the first shear pin and the second shear pin are cut off respectively, first piston and the second piston move to the middle part of central tube respectively under effect vertically at pressure, final pressure is passed to the both sides of main packing element, makes main packing element be subject to compression swelling, finally forms seal pack;
D. simultaneously, first piston and the mutual interlock of the first locking slips, stop first piston to move to the first joint direction, the second piston and the second locking slips are engaged, stop the second piston to move to the second joint direction, thereby stop packing element resilience, form lasting packing.
The present embodiment is on the basis of above-described embodiment 1, and the first slips 7 in embodiment 1 and the second slips 22 are replaced with to block insert type casing slip.
Referring to Fig. 2 to Fig. 5, a kind of hanging packer, comprises that 4, one block insert type casing slips 4 of two block insert type casing slips are arranged between the second cone 6 and the second piston 7, and another block insert type casing slip 4 is arranged between the first cone 8 and first piston 9;
Block insert type casing slip 4 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. 6 to Figure 10; 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, large casing slip 1 is fixed on hanging packer; 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. 3 and Fig. 4, body 20 upper surfaces of small casing slips 2 are positioned at the outside of groove 12.Be the upper surface that body 20 upper surfaces protrude from shell 10, a little more than the upper surface of shell 10.
Referring to Fig. 7 and Figure 10, 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. 4 and Fig. 5, 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 small casing Carvalho to protrude from the surface of 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. 4, 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. 3, Fig. 6 and Fig. 8, 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. 2, when assembling, 6 small casing slips 2 are arranged on respectively in 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 the time of the whole hanging packer of assembling, only existing slips need be replaced by the block insert type casing slip assembling, shear pin 5 is contained in shear pin hole 17(on large casing slip 1 referring to Fig. 4) in be fixed together with first, second cone respectively, when overall assembling, only need change the integral type casing slip of embodiment 1 into block insert type casing slip of the present invention, same each hanging packer is equipped with 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 embodiment, 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 hanging packer, is characterized in that, comprises two block insert type casing slips, and a described block insert type casing slip is arranged between the second cone and the second piston, and described in another, block insert type casing slip is arranged between the first cone and first piston;
Described 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.
2. hanging packer 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. hanging packer 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, for shear pin is installed, large casing slip is fixed in the first cone or the second cone; 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. hanging packer 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. hanging packer 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. hanging packer 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. hanging packer according to claim 1, is characterized in that, described shell is provided with at least one finedraw.
8. hanging packer according to claim 6, is characterized in that, described shell is provided with U-shaped groove.
9. hanging packer 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 hanging packer 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 |
|---|---|---|---|
| CN201210586757.4A CN103899272B (en) | 2012-12-28 | 2012-12-28 | A kind of hanging packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210586757.4A CN103899272B (en) | 2012-12-28 | 2012-12-28 | A kind of hanging packer |
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| CN103899272A true CN103899272A (en) | 2014-07-02 |
| CN103899272B CN103899272B (en) | 2016-10-05 |
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| CN201210586757.4A Active CN103899272B (en) | 2012-12-28 | 2012-12-28 | A kind of hanging packer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727776A (en) * | 2015-02-12 | 2015-06-24 | 中国海洋石油总公司 | Hanging packer for horizontal well multistage fracturing |
| CN108266153A (en) * | 2018-02-07 | 2018-07-10 | 中国石油集团西部钻探工程有限公司 | Suspension packing integral type list fluid cylinder can self-locking hanger |
| CN113250647A (en) * | 2021-07-19 | 2021-08-13 | 中国石油集团川庆钻探工程有限公司 | Suspension well completion integrated packer and well completion pipe string |
| CN114458223A (en) * | 2021-07-06 | 2022-05-10 | 中海油能源发展股份有限公司 | Layered packer for large-drift-diameter water injection and using method thereof |
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| CN102575507A (en) * | 2010-08-09 | 2012-07-11 | 哈里伯顿能源服务公司 | Expansion device |
| CN202417418U (en) * | 2011-12-29 | 2012-09-05 | 安东石油技术（集团）有限公司 | Two-way base seal hanging packer |
| CN203161163U (en) * | 2012-12-28 | 2013-08-28 | 安东石油技术（集团）有限公司 | Suspension packer |
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| 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 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104727776A (en) * | 2015-02-12 | 2015-06-24 | 中国海洋石油总公司 | Hanging packer for horizontal well multistage fracturing |
| CN108266153A (en) * | 2018-02-07 | 2018-07-10 | 中国石油集团西部钻探工程有限公司 | Suspension packing integral type list fluid cylinder can self-locking hanger |
| CN108266153B (en) * | 2018-02-07 | 2023-08-29 | 中国石油天然气集团有限公司 | Suspension sealing integrated single-hydraulic cylinder self-locking hanger |
| CN114458223A (en) * | 2021-07-06 | 2022-05-10 | 中海油能源发展股份有限公司 | Layered packer for large-drift-diameter water injection and using method thereof |
| CN114458223B (en) * | 2021-07-06 | 2023-10-31 | 中海油能源发展股份有限公司 | Layered packer for large-drift-diameter water injection and application method thereof |
| CN113250647A (en) * | 2021-07-19 | 2021-08-13 | 中国石油集团川庆钻探工程有限公司 | Suspension well completion integrated packer and well completion pipe string |
| CN113250647B (en) * | 2021-07-19 | 2021-09-14 | 中国石油集团川庆钻探工程有限公司 | Suspension well completion integrated packer and well completion pipe string |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103899272B (en) | 2016-10-05 |
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Effective date of registration: 20181227 Address after: No. 309, Second Street, Middle and South China, West District, Tianjin Binhai Economic and Technological Development Zone, 300450 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. |
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