CN103590800B - The multistage pitching fracturing sliding bush of ball seat can be salvaged - Google Patents

The multistage pitching fracturing sliding bush of ball seat can be salvaged Download PDF

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Publication number
CN103590800B
CN103590800B CN201310613926.3A CN201310613926A CN103590800B CN 103590800 B CN103590800 B CN 103590800B CN 201310613926 A CN201310613926 A CN 201310613926A CN 103590800 B CN103590800 B CN 103590800B
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China
Prior art keywords
pawl
ball seat
salvaging
sleeve
connection
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CN201310613926.3A
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Chinese (zh)
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CN103590800A (en
Inventor
张道鹏
张毅超
谢明
潘勇
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中国石油集团川庆钻探工程有限公司
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Priority to CN201310613926.3A priority Critical patent/CN103590800B/en
Publication of CN103590800A publication Critical patent/CN103590800A/en
Application granted granted Critical
Publication of CN103590800B publication Critical patent/CN103590800B/en

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Abstract

The invention discloses a kind of multistage pitching fracturing sliding bush salvaging ball seat, comprise joint, play pawl and spring claw tube, joint comprises top connection and lower contact, top connection is connected with lower contact, top connection upper end is provided with locating slot, lower locating slot and side opening, also comprises slider mechanism and salvages ball seat mechanism, when described slider mechanism and salvaging ball seat mechanism move downward for open sliding sleeve, bullet pawl gap in slider mechanism is corresponding with side opening, gangs up inside and outside pipe; Described salvaging ball seat mechanism two ends are respectively arranged with the self-locking bullet pawl coordinated with the salvaging ball seat mechanism in upper level sliding sleeve and the salvaging ball seat mechanism in next stage sliding sleeve for salvaging ball seat.The present invention can ensure that bottom sliding sleeve is opened successively by pitching and realize fracture acidizing operation, can salvage multistage sliding sleeve tee and ball again after operation by coiled tubing is disposable, makes to obtain as far as possible large latus rectum in pipe.

Description

The multistage pitching fracturing sliding bush of ball seat can be salvaged
Technical field
The invention discloses a kind of multistage pitching fracturing sliding bush of the ball seat salvaged for the operation of oil-gas field fracturing acidizing treatment, belong to oil-gas field downhole operation instrument.
Background technology
At present, in horizontal well bore hole staged fracturing Acidizing Technology, the widely used pitching sliding sleeve of institute is opened mainly through pitching and is formed pressure break passage, constructs from bottom to top step by step.During construction, the unlatching ball of sliding sleeve is sitting on ball seat, and most of well sliding sleeve can normally be opened, and after having constructed, ball is returned by discharge opeing and discharges ground.Such as, China Patent No. " 201010216524.6 " discloses a kind of drillable ball injection sliding sleeve being applicable to horizontal well, publication date is on November 10th, 2010, it comprises piecing devices and spring claw tube structure, it is characterized in that: described piecing devices are made up of top connection and lower contact, top connection and lower contact, by being threaded, are provided with locating slot, lower locating slot and side opening in the inner circle of top connection upper end; Spring claw tube structure is made up of spring claw tube, and spring claw tube is arranged in upper and lower joint, and the upper end of spring claw tube is provided with bullet pawl, is provided with plays pawl boss in the upper end playing pawl.For another example, the disclosed a kind of pitching sliding sleeve of China Patent No. " 201220389703.4 ", publication date is on 03 20th, 2013.The top connection of this instrument, circulation shell, lower contact are threaded in turn and are fixed by anti-rotation nail, power transmission pipe by shear pin be fixed on circulation outer casing inner wall on and seal up circulation shell on opening, ball seat is threaded on power transmission pipe lower end inner wall, ball seat adopts and can bore material and make, and the lower end step that inverted-proof ring is arranged on power transmission pipe is locked by inverted-proof ring interstage sleeve.
But pitching sliding sleeve of the prior art also exists following deficiency: if gas output is less, particularly oil well, ball is not easy to return and ejects, thus affects construction effect.In order to ensure completion tubular column effectively unimpeded in the effect after construction and well, also need to bore grinder tool by coiled tubing band if desired to carry out to the ball do not returned out in tubing string and the relatively little ball seat of latus rectum brills and grind operation, to obtain comparatively big orifice, but can not sliding sleeve tee be salvaged after operation, be unfavorable for the lifting of Oil/gas Well output, later stage operation is also inconvenient.
Summary of the invention
The object of the invention is to overcome existing pitching sliding sleeve above shortcomings, a kind of multistage pitching fracturing sliding bush salvaging ball seat is provided, the present invention can ensure that bottom sliding sleeve is opened successively by pitching and realize fracture acidizing operation, after operation, multistage sliding sleeve tee and ball can be salvaged by coiled tubing is disposable again, make to obtain as far as possible large latus rectum in pipe.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of multistage pitching fracturing sliding bush salvaging ball seat, comprise joint, play pawl and spring claw tube, joint comprises top connection and lower contact, top connection is connected with lower contact, top connection upper end is provided with locating slot, lower locating slot and side opening, it is characterized in that: also comprise slider mechanism and salvage ball seat mechanism, when described slider mechanism and salvaging ball seat mechanism move downward for open sliding sleeve, bullet pawl gap in slider mechanism is corresponding with side opening, gangs up inside and outside pipe; Described salvaging ball seat mechanism two ends are respectively arranged with the self-locking bullet pawl coordinated with the salvaging ball seat mechanism in upper level sliding sleeve and the salvaging ball seat mechanism in next stage sliding sleeve for salvaging ball seat.
Described slider mechanism comprises and is arranged on switch sleeve in joint and load cover, switch sleeve is fixedly connected with load cover, switch sleeve upper end is provided with the first bullet pawl, load cover is connected with joint by sliding sleeve shear pin, when the first bullet pawl boss played on pawl moves to lower locating slot from upper locating slot, the bullet pawl gap of the first bullet pawl is corresponding with side opening, gangs up inside and outside pipe.
Described salvaging ball seat mechanism comprises bullet pawl and stops lock tube, connect inner sleeve, spring claw tube, salvage shear pin, ball seat, salvage and play pawl head, play pawl stop lock tube and be connected inner sleeve connection, bullet pawl stops lock tube upper end and is provided with the second bullet pawl, spring claw tube is at load cover and connect between inner sleeve, spring claw tube is by salvaging shear pin and being connected inner sleeve and connecting, spring claw tube upper end is provided with the 3rd and plays pawl, 3rd plays in the spacing locating slot on load cover of pawl, spring claw tube lower end plays pawl head with salvaging and is connected, salvage bullet pawl head to be connected with ball seat, salvage bullet pawl head lower end and be provided with the 4th bullet pawl, second plays the 4th of the salvaging bullet pawl head lower end of pawl and upper level sliding sleeve plays pawl and coordinates self-locking, 4th plays pawl and the bullet pawl of next stage sliding sleeve stops second of lock tube upper end and plays pawl and coordinate self-locking.
Described switch sleeve and load cover are threaded connection, and connection of thread is provided with sealing ring, and is formed with locating slot after being threaded, and the 3rd bullet pawl is spacing in locating slot.
Described top connection upper end is connected with upper tube string, and top connection lower end and lower contact upper end are threaded connection, and are fixed by hold-down screw, and lower contact lower end is connected with lower tube string.
The outer wall of described switch sleeve is provided with the sealing ring coordinated with top connection inwall.
Described load cover outer wall is provided with keyway, in keyway, is provided with the anti-turn screw coordinated with joint.
Described connection inner sleeve lower end and ball seat upper end are slidably matched, and the place of being slidably matched is provided with sealing ring sealing.
Described bullet pawl stops sealing ring lock tube outer wall being provided with and coordinating with switch sleeve inwall, plays pawl and stops sealing ring lock tube inwall is provided with being connected outer wall of inside race and coordinating.
Described bullet pawl stops lock tube and is connected inner sleeve and is threaded connection, and spring claw tube lower end plays pawl head thread with salvaging and is connected, and salvaging bullet pawl head is threaded with ball seat.
Employing the invention has the advantages that:
One, the present invention also comprises slider mechanism and salvages ball seat mechanism, and when described slider mechanism and salvaging ball seat mechanism move downward for open sliding sleeve, the bullet pawl gap in slider mechanism is corresponding with side opening, gangs up inside and outside pipe; Described salvaging ball seat mechanism two ends are respectively arranged with the self-locking bullet pawl coordinated with the salvaging ball seat mechanism in upper level sliding sleeve and the salvaging ball seat mechanism in next stage sliding sleeve for salvaging ball seat, adopt this structure, can ensure that bottom sliding sleeve is opened successively by pitching and realize fracture acidizing operation, multistage sliding sleeve tee and ball can be salvaged by coiled tubing is disposable again after operation, make to obtain as far as possible large latus rectum in pipe, be beneficial to the lifting of Oil/gas Well output and the convenience of later stage operation.
Two, in the present invention, described slider mechanism comprises and is arranged on switch sleeve in joint and load cover, switch sleeve is fixedly connected with load cover, switch sleeve upper end is provided with the first bullet pawl, load cover is connected with joint by sliding sleeve shear pin, when the first bullet pawl boss played on pawl moves to lower locating slot from upper locating slot, the bullet pawl gap of the first bullet pawl is corresponding with side opening, gang up inside and outside pipe, adopt this structure, when slider mechanism moves downward, salvaging ball seat mechanism can be driven to move simultaneously, and the structure of pawl is played by switch sleeve and first, than the structure being played pawl by spring claw tube and first, more reliable when open sliding sleeve, and the connection matching relationship of switch sleeve and load cover and salvaging ball seat mechanism is tightr.
Three, in the present invention, described salvaging ball seat mechanism comprises bullet pawl and stops lock tube, connect inner sleeve, spring claw tube, salvage shear pin, ball seat, salvage and play pawl head, play pawl stop lock tube and be connected inner sleeve connection, bullet pawl stops lock tube upper end and is provided with the second bullet pawl, spring claw tube is at load cover and connect between inner sleeve, spring claw tube is by salvaging shear pin and being connected inner sleeve and connecting, spring claw tube upper end is provided with the 3rd and plays pawl, 3rd plays in the spacing locating slot on load cover of pawl, spring claw tube lower end plays pawl head with salvaging and is connected, salvage bullet pawl head to be connected with ball seat, salvage bullet pawl head lower end and be provided with the 4th bullet pawl, second plays the 4th of the salvaging bullet pawl head lower end of pawl and upper level sliding sleeve plays pawl and coordinates self-locking, 4th plays pawl and the bullet pawl of next stage sliding sleeve stops second of lock tube upper end and plays pawl and coordinate self-locking, adopt this structure, finally can realize the salvaging that a time running string can complete multistage sliding sleeve, and judge that whether salvaging is successful by coiled tubing tension variations in salvaging ball seat process.
Four, in the present invention, described switch sleeve and load cover are threaded connection, connection of thread is provided with sealing ring, and be formed with locating slot after being threaded, 3rd to play pawl spacing in locating slot, and adopting is threaded not only ensure that with sealing ring the reliability being connected and sealing, and is convenient to connection and dismantles, be formed with locating slot after being threaded, make the 3rd bullet pawl spacing more accurate.
Five, in the present invention, described top connection upper end is connected with upper tube string, top connection lower end and lower contact upper end are threaded connection, and fixed by hold-down screw, lower contact lower end is connected with lower tube string, it is reliable that this structure makes upper and lower joint connect, and contacts respectively and connect, achieve the salvaging of multistage sliding sleeve with upper, lower tube.
Six, in the present invention, the outer wall of described switch sleeve is provided with the sealing ring coordinated with top connection inwall, ensure that the sealing reliability of switch sleeve and top connection.
Seven, in the present invention, described load cover outer wall is provided with keyway, is provided with the anti-turn screw coordinated with joint in keyway, this structure prevents from load is overlapped and the relatively rotating of joint.
Eight, in the present invention, described connection inner sleeve lower end and ball seat upper end are slidably matched, and the place of being slidably matched is provided with sealing ring sealing, can be slided mutually in connection inner sleeve lower end and ball seat upper end, and in turn ensure that sealing when mutually sliding by sealing ring.
Nine, in the present invention, described bullet pawl stops sealing ring lock tube outer wall being provided with and coordinating with switch sleeve inwall, ensure that bullet pawl stops the sealing reliability between lock tube and switch sleeve, play pawl and stop sealing ring lock tube inwall is provided with being connected outer wall of inside race and coordinating, ensure that bullet pawl stops lock tube and the sealing reliability being connected inner sleeve.
Ten, in the present invention, described bullet pawl stops lock tube and is connected inner sleeve and is threaded connection, and spring claw tube lower end plays pawl head thread with salvaging and is connected, and salvaging bullet pawl head is threaded with ball seat, and this structure ensure that the detachability of each parts.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention
Be labeled as in figure: 1, top connection, 2, sealing ring, 3, switch sleeve, 4, play pawl and stop lock tube, 5, inner sleeve is connected, 6, load cover, 7, sliding sleeve shear pin, 8, spring claw tube, 9, shear pin is salvaged, 10, anti-turn screw, 11, ball seat, 12, hold-down screw, 13, salvage and play pawl head, 14, lower contact, 15, open ball, 16, side opening, 17, first plays pawl, 18, second play pawl, the 19, the 3rd plays pawl, and the 20, the 4th plays pawl.
Detailed description of the invention
Embodiment 1
A kind of multistage pitching fracturing sliding bush salvaging ball seat, comprise joint, play pawl and spring claw tube, joint comprises top connection 1 and lower contact 14, top connection 1 is connected with lower contact 14, top connection 1 upper end is provided with locating slot, lower locating slot and side opening 16, and it also comprises slider mechanism and salvages ball seat mechanism, when described slider mechanism and salvaging ball seat mechanism move downward for open sliding sleeve, bullet pawl gap in slider mechanism is corresponding with side opening 16, gangs up inside and outside pipe; Described salvaging ball seat mechanism two ends are respectively arranged with the self-locking bullet pawl coordinated with the salvaging ball seat mechanism in upper level sliding sleeve and the salvaging ball seat mechanism in next stage sliding sleeve for salvaging ball seat.
In the present embodiment, described slider mechanism comprises and is arranged on switch sleeve 3 in joint and load cover 6, switch sleeve 3 is fixedly connected with load cover 6, switch sleeve 3 upper end is provided with the first bullet pawl 17, load cover 6 is connected with joint by sliding sleeve shear pin 7, when the first bullet pawl boss played on pawl 17 moves to lower locating slot from upper locating slot, the bullet pawl gap of the first bullet pawl 17 is corresponding with side opening 16, gangs up inside and outside pipe.
In the present embodiment, described salvaging ball seat mechanism comprises bullet pawl and stops lock tube 4, connect inner sleeve 5, spring claw tube 8, salvage shear pin 9, ball seat 11, salvage and play pawl head 13, play pawl to stop lock tube 4 and be connected inner sleeve 5 and connect, bullet pawl stops lock tube 4 upper end and is provided with the second bullet pawl 18, spring claw tube 8 is at load cover 3 and connect between inner sleeve 5, spring claw tube 8 is by salvaging shear pin 9 and being connected inner sleeve 5 and connecting, spring claw tube 8 upper end is provided with the 3rd and plays pawl 19, 3rd plays in the spacing locating slot on load cover 6 of pawl 19, spring claw tube 8 lower end plays pawl head 13 with salvaging and is connected, salvage bullet pawl head 13 to be connected with ball seat 11, salvage bullet pawl head 13 lower end and be provided with the 4th bullet pawl 20, second plays the 4th of the salvaging bullet pawl head lower end of pawl 18 and upper level sliding sleeve plays pawl and coordinates self-locking, 4th plays pawl 20 and the bullet pawl of next stage sliding sleeve stops second of lock tube upper end and plays pawl and coordinate self-locking.
In the present embodiment, described switch sleeve 3 and load cover 6 are threaded connection, and connection of thread is provided with sealing ring, and is formed with locating slot after being threaded, and the 3rd bullet pawl 19 is spacing in locating slot.
In the present embodiment, described top connection 1 upper end is connected with upper tube string, and top connection 1 lower end and lower contact 14 upper end are threaded connection, and are fixed by hold-down screw, and lower contact 14 lower end is connected with lower tube string.
In the present embodiment, the outer wall of described switch sleeve 3 is provided with the sealing ring coordinated with top connection 1 inwall.
In the present embodiment, described load overlaps on 6 outer walls and is provided with keyway, is provided with the anti-turn screw 10 coordinated with joint in keyway.
In the present embodiment, described connection inner sleeve 5 lower end and ball seat 11 upper end are slidably matched, and the place of being slidably matched is provided with sealing ring sealing.
In the present embodiment, described bullet pawl stops sealing ring lock tube 4 outer wall being provided with and coordinating with switch sleeve 3 inwall, plays pawl and stops sealing ring lock tube 4 inwall is provided with being connected inner sleeve 5 outer wall and coordinating.
In the present embodiment, described bullet pawl stops lock tube 4 and is connected inner sleeve 5 and is threaded connection, and spring claw tube 8 lower end plays pawl head 13 with salvaging and is threaded, and salvages bullet pawl head 13 and is threaded with ball seat 11.
Embodiment 2
The present embodiment is by reference to the accompanying drawings to being described.As shown in Figure 1, the present invention is by joint, slider mechanism with can salvage ball seat mechanism and form.
Joint comprises top connection 1 and lower contact 14, and the upper end of top connection 1 lower end and lower contact 14 is threaded connection, and in order to fixing needs, be provided with hold-down screw 12, top connection 1 upper end is connected with upper tube string, and lower contact 14 lower end is connected with lower tube string.
Slider mechanism comprises sealing ring 2, switch sleeve 3, load cover 6, sliding sleeve shear pin 7, anti-turn screw 10, switch sleeve 3 and load cover 6 are threaded connection, in order to the needs of anti-rotation, be provided with anti-turn screw 10 and slide in the keyway of load cover 6, switch sleeve 3 upper end is provided with the first bullet pawl 17.
Ball seat mechanism can be salvaged comprise and play that pawl stops lock tube 4, connects inner sleeve 5, spring claw tube 8, salvage shear pin 9, ball seat 11, salvage and play pawl head 13, play pawl and stop lock tube 4 and be connected inner sleeve 5 and be threaded connection; Spring claw tube 8 upper end is provided with the 3rd and plays pawl 19, and spring claw tube 8 lower end and salvaging play pawl head 13 and ball seat 11 is threaded connection, and can slide mutually in connection inner sleeve 5 lower end and ball seat 11 upper end, have sealing ring to seal.Playing pawl, to stop lock tube 4 upper end be the second bullet pawl 18, and salvaging and playing pawl head 13 lower end is the 4th play pawl 20, and can insert with upper and lower level sliding sleeve respectively in actual use and realize self-locking and be connected.
When site operation uses, ball seat pitching sliding sleeve can be salvaged and be lowered into design attitude together with other downhole tool by design of string pipe requirement, then drop into when needing to open sliding sleeve and open ball 15, open ball 15 and be sitting in ball seat 11 top, build the pressure in pipe, sliding sleeve shear pin 7 is cut off, slider mechanism with can salvage ball seat whole mechanism and move down, the bullet pawl boss that switch sleeve 3 top first plays pawl moves to lower locating slot from the upper locating slot of top connection 1, be stuck in lower locating slot, the bullet pawl gap of the first bullet pawl 17 is corresponding with the side opening 16 in top connection 1, gang up inside and outside pipe, sliding sleeve is opened complete, separate stratum fracfturing acidizing treatment can be carried out.
After the construction of each layer terminates, by the row's of returning mode unlatching ball 15 at different levels returned and drain into well head and reclaim, if can not the row of returning or do not carry out flowback procedure, also directly can carry out sliding sleeve fishing.
Pawl head 13 is played by connecting successively to salvage from top to bottom when salvaging ball seat, centralizer, give up, coiled tubing, under enter coiled tubing to well inner sliding sleeve position, press down tubing string, make to salvage and play the 4th of pawl head 13 lower end and play pawl 20 and the bullet pawl in next stage sliding sleeve and stop second of lock tube 4 upper end and plays pawl and embed mutually also self-locking, then coiled tubing is carried on, cut off and salvage shear pin 9, can judge that salvaging shear pin 9 cuts off by suspending weight change, ball seat mechanism can be salvaged hold, now the 3rd bullet pawl 19 of spring claw tube 8 upper end inside contracts withdrawal, lost efficacy with the sealing being connected inner sleeve 5 in ball seat 11 top.No matter open ball 15 whether still on ball seat 11, the upper and lower fluid passage of sliding sleeve is all communicated with, and fishing tool tubing string can continue to carry out direct circulation.Now as without the need to salvaging subordinate's sliding sleeve tee, directly can trip out coiled tubing, coiled tubing is entered under subordinate's ball seat then can continue as salvaged, ball seat mechanism can be salvaged entirety is arrived next stage sliding sleeve position by slider mechanism endoporus, pawl head 13 is played for salvaging due to ball seat mechanism lower end can be salvaged, and now pipe inner cycle channel can carry out normal flush cycle, so above fishing process can be repeated to next stage sliding sleeve, finally realize the salvaging that a time running string can complete multistage sliding sleeve.

Claims (7)

1. can salvage the multistage pitching fracturing sliding bush of ball seat for one kind, comprise joint, play pawl and spring claw tube, joint comprises top connection (1) and lower contact (14), top connection (1) is connected with lower contact (14), top connection (1) upper end is provided with locating slot, lower locating slot and side opening (16), it is characterized in that: also comprise slider mechanism and salvage ball seat mechanism, when described slider mechanism and salvaging ball seat mechanism move downward for open sliding sleeve, bullet pawl gap in slider mechanism is corresponding with side opening (16), gangs up inside and outside pipe; Described salvaging ball seat mechanism two ends are respectively arranged with the self-locking bullet pawl coordinated with the salvaging ball seat mechanism in upper level sliding sleeve and the salvaging ball seat mechanism in next stage sliding sleeve for salvaging ball seat;
Described slider mechanism comprises and is arranged on switch sleeve (3) in joint and load cover (6), switch sleeve (3) is fixedly connected with load cover (6), switch sleeve (3) upper end is provided with the first bullet pawl (17), load cover (6) is connected with top connection by sliding sleeve shear pin (7), when the first bullet pawl boss played on pawl (17) moves to lower locating slot from upper locating slot, the bullet pawl gap of the first bullet pawl (17) is corresponding with side opening (16), gangs up inside and outside pipe;
Described salvaging ball seat mechanism comprises bullet pawl and stops lock tube (4), connect inner sleeve (5), spring claw tube (8), salvage shear pin (9), ball seat (11), salvage and play pawl head (13), play pawl stop lock tube (4) and be connected inner sleeve (5) connection, bullet pawl stops lock tube (4) upper end and is provided with the second bullet pawl (18), spring claw tube (8) is positioned at load cover (6) and connects between inner sleeve (5), spring claw tube (8) is by salvaging shear pin (9) and being connected inner sleeve (5) and connecting, spring claw tube (8) upper end is provided with the 3rd and plays pawl (19), 3rd plays in pawl (19) spacing locating slot on load cover (6), spring claw tube (8) lower end plays pawl head (13) with salvaging and is connected, salvage bullet pawl head (13) to be connected with ball seat (11), salvage bullet pawl head (13) lower end and be provided with the 4th bullet pawl (20), second plays pawl (18) plays pawl with the 4th of the salvaging bullet pawl head lower end of upper level sliding sleeve and coordinates self-locking, 4th plays pawl (20) and the bullet pawl of next stage sliding sleeve stops second of lock tube upper end and plays pawl and coordinate self-locking,
Described bullet pawl stops sealing ring lock tube (4) outer wall being provided with and coordinating with switch sleeve (3) inwall, plays pawl and stops sealing ring lock tube (4) inwall is provided with being connected inner sleeve (5) outer wall and coordinating.
2. the multistage pitching fracturing sliding bush salvaging ball seat according to claim 1, it is characterized in that: described switch sleeve (3) and load cover (6) are threaded connection, connection of thread is provided with sealing ring, and being formed with locating slot after being threaded, the 3rd bullet pawl (19) is spacing in locating slot.
3. the multistage pitching fracturing sliding bush salvaging ball seat according to claim 1 and 2, it is characterized in that: described top connection (1) upper end is connected with upper tube string, top connection (1) lower end and lower contact (14) upper end are threaded connection, and fixed by hold-down screw, lower contact (14) lower end is connected with lower tube string.
4. the multistage pitching fracturing sliding bush salvaging ball seat according to claim 1 and 2, is characterized in that: the outer wall of described switch sleeve (3) is provided with the sealing ring coordinated with top connection (1) inwall.
5. the multistage pitching fracturing sliding bush salvaging ball seat according to claim 1 and 2, is characterized in that: described load cover (6) outer wall is provided with keyway, is provided with the anti-turn screw (10) coordinated with joint in keyway.
6. the multistage pitching fracturing sliding bush salvaging ball seat according to claim 1 and 2, is characterized in that: described connection inner sleeve (5) lower end and ball seat (11) upper end are slidably matched, and the place of being slidably matched is provided with sealing ring sealing.
7. the multistage pitching fracturing sliding bush salvaging ball seat according to claim 1 and 2, it is characterized in that: described bullet pawl stops lock tube (4) and is connected inner sleeve (5) and is threaded connection, spring claw tube (8) lower end plays pawl head (13) with salvaging and is threaded, and salvages bullet pawl head (13) and is threaded with ball seat (11).
CN201310613926.3A 2013-11-28 2013-11-28 The multistage pitching fracturing sliding bush of ball seat can be salvaged CN103590800B (en)

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CN103590800B true CN103590800B (en) 2016-03-16

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Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
CN104790909B (en) * 2015-04-09 2018-06-05 中国石油集团西部钻探工程有限公司 The retrievable pitching sliding sleeve of ball seat
CN106545308A (en) * 2015-09-23 2017-03-29 中国石油化工股份有限公司 The method salvaged pipe string and salvage the ball seat of spherically seated sliding sleeve using which
CN108240197A (en) * 2017-12-27 2018-07-03 中国石油集团长城钻探工程有限公司 The pitching sliding sleeve of ball seat can be salvaged

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Publication number Priority date Publication date Assignee Title
US2242602A (en) * 1939-09-29 1941-05-20 Shell Dev Double duty fishing tool
CN202731865U (en) * 2012-05-28 2013-02-13 中国石油天然气股份有限公司 Switchable fracturing sliding sleeve
CN202832376U (en) * 2012-08-07 2013-03-27 新疆华油油气工程有限公司 Full-bore closable stratified sliding sleeve
CN103321608A (en) * 2013-07-09 2013-09-25 中国石油集团渤海钻探工程有限公司 Rotation-free pawl-type sliding sleeve with ball seat capable of being taken out
CN203603869U (en) * 2013-11-28 2014-05-21 中国石油集团川庆钻探工程有限公司 Multi-level ball injection fracturing slide sleeve capable of fishing up ball seats

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Publication number Priority date Publication date Assignee Title
MX2013002163A (en) * 2010-08-24 2014-06-11 Stonecreek Technologies Inc Apparatus and method for fracturing a well.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2242602A (en) * 1939-09-29 1941-05-20 Shell Dev Double duty fishing tool
CN202731865U (en) * 2012-05-28 2013-02-13 中国石油天然气股份有限公司 Switchable fracturing sliding sleeve
CN202832376U (en) * 2012-08-07 2013-03-27 新疆华油油气工程有限公司 Full-bore closable stratified sliding sleeve
CN103321608A (en) * 2013-07-09 2013-09-25 中国石油集团渤海钻探工程有限公司 Rotation-free pawl-type sliding sleeve with ball seat capable of being taken out
CN203603869U (en) * 2013-11-28 2014-05-21 中国石油集团川庆钻探工程有限公司 Multi-level ball injection fracturing slide sleeve capable of fishing up ball seats

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