CN109339725B - Releasing device - Google Patents
Releasing device Download PDFInfo
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- CN109339725B CN109339725B CN201811305699.7A CN201811305699A CN109339725B CN 109339725 B CN109339725 B CN 109339725B CN 201811305699 A CN201811305699 A CN 201811305699A CN 109339725 B CN109339725 B CN 109339725B
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- Prior art keywords
- joint
- sliding sleeve
- locking claw
- head
- wall
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- Expired - Fee Related
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- 210000000078 claw Anatomy 0.000 claims abstract description 78
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 238000010008 shearing Methods 0.000 claims abstract description 6
- 230000008602 contraction Effects 0.000 claims abstract description 4
- 239000011229 interlayer Substances 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 35
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004047 hole gas Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a releasing device which comprises an upper joint, a back-off joint, a functional sliding sleeve, a locking claw releasing head, a rotary releasing head and a lower joint, wherein the upper joint is connected with the back-off joint through a bolt; the reverse-buckling joint is in threaded connection with the locking claw lost head, a rotary lost head is arranged on an interlayer between the reverse-buckling joint and the locking claw lost head, the reverse-buckling joint and the rotary lost head are connected in a torque transmission mode, and the bottom of the rotary lost head is in threaded connection with the lower joint; the functional sliding sleeve is slidably arranged in the cavities of the upper joint, the back-off joint and the locking claw lost head, a shearing pin is arranged between the functional sliding sleeve and the upper joint, and a steel ball seat part is arranged on the functional sliding sleeve; the bottom of locking claw head is equipped with a plurality of locking claws, and the bottom of function sliding sleeve is equipped with the locking claw arch of restriction locking claw radial contraction, and the middle part of function sliding sleeve is equipped with the annular groove that is used for holding the locking claw. By adopting the mode of applying pressure from the upper part, the success rate of hydraulic releasing operation can be greatly improved. And the mechanical releasing operation is conveniently carried out.
Description
Technical Field
The invention relates to the field of downhole tools used in well cementation and completion in the field of oil and gas exploitation, in particular to a releasing device.
Background
The releasing tool is a common downhole tool in the well completion process and is mainly used for well cementation operation and fracturing operation. The well is usually in the form of a safety joint, often called a release tool or an automatic tripping structure in the fields of cementing and production, etc. In a completion process, it is often necessary to trip a portion of the completion string out of the wellbore, leaving another portion of the completion string in the wellbore; to meet the requirements of these processes, a release device is used during the construction process to disengage the lower string and the upper string to lift the wellhead separation. With the increase of horizontal wells, particularly the staged fracturing process of a long-horizontal-section open hole gas well, a downhole open hole packer and a staged fracturing tool string need to be lowered into the well by a drill rod, the conventional fracturing release tool cannot realize the tie-back fracturing operation, and the success rate of the lowering process pipe string and the feeding pipe string is low, so that the exploitation efficiency is influenced.
Chinese patent document CN202946065U describes a fracturing releasing device, which comprises a central rod, a mechanical releasing joint, a limit joint, a lower joint, a positioning sleeve, a claw cylinder and a piston; the mechanical releasing joint comprises an upper releasing joint barrel and a lower releasing joint barrel, the inner side of the lower end of the upper releasing joint barrel and the outer side of the upper end of the lower releasing joint barrel are connected into a whole, and the outer side of the lower end of the central rod and the inner side of the upper part of the lower releasing joint barrel are fixedly arranged together; the inner side of the lower end of the limiting joint is fixedly installed with the outer side of the middle part of the lower joint. The scheme has the following problems that 1, more sliding parts are required to be installed between the central rod and the tie-back cylinder, so that the requirement on the diameter difference between the central rod and the tie-back cylinder is high, and the structure is not compact. And 2, the cross section for driving the piston is small, the pressure building requirement is high, and the releasing success rate is difficult to ensure. 3. The cross section of the piston is limited by the way of the downward pressure drive.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a releasing device, which can improve the releasing success rate, can conveniently realize various operation modes of hydraulic releasing and mechanical releasing, and can finish releasing operation independently without mutual interference.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a releasing device comprises an upper joint, a back-off joint, a functional sliding sleeve, a locking claw releasing head, a rotary releasing head and a lower joint;
the upper joint is in threaded connection with the back-off joint, the back-off joint is in threaded connection with the lock claw back-off head, a rotary back-off head is arranged on an interlayer between the back-off joint and the lock claw back-off head, the back-off joint and the rotary back-off head are connected in a torque transmission mode, and the bottom of the rotary back-off head is in threaded connection with the lower joint;
the functional sliding sleeve is slidably arranged in a cavity of the upper joint, the back-off joint and the locking claw lost head, a shearing pin for locking axial displacement is arranged between the functional sliding sleeve and the upper joint, a steel ball seat part for forming sealing with a releasing steel ball is arranged at the upper end of the functional sliding sleeve, and a reset spring for resetting the functional sliding sleeve is arranged in the lower joint;
the locking claw is lost and is equipped with the protruding structure of locking axial position mutually between the head is lost in the rotation, and the bottom that the locking claw was lost is equipped with a plurality of locking claws, and the bottom of function sliding sleeve is equipped with the locking claw arch of restriction locking claw radial contraction, and the middle part of function sliding sleeve is equipped with the annular groove that is used for holding the locking claw.
In the preferred scheme, a sealing cylinder is further arranged between the upper joint and the lower joint and is positioned on the outer wall of the upper joint, the outer wall of the upper joint is in sliding connection with the sealing cylinder through a sealing structure, and the bottom of the sealing cylinder is in threaded or transitional connection with the lower joint.
In a preferred scheme, at least one sealing ring is arranged between the inner wall of the upper joint and the outer wall of the functional sliding sleeve.
In a preferred embodiment, the shear pins are evenly distributed along the circumference.
In the preferred scheme, an inner limiting step is arranged on the inner wall of the upper joint so as to limit the axial position of the top of the functional sliding sleeve;
the inner wall of the back-off joint is provided with a sliding sleeve limiting bulge so as to limit the axial position of the bottom of the functional sliding sleeve.
In the preferred scheme, the inner wall of lower clutch and the interior protective sheath threaded connection of spring constitute annular slide between protective sheath and the lower clutch in the spring, and spring return sliding sleeve and reset spring install in annular slide, and the top of spring return sliding sleeve contacts with the bottom of function sliding sleeve, and the bottom of spring return sliding sleeve contacts with reset spring.
In the preferred scheme, the inner wall and the outer wall of the spring return sliding sleeve are both provided with O-shaped sealing rings, so that the spring return sliding sleeve and the annular slideway form sealing connection.
In a preferred scheme, the bottom of the upper connector is in threaded connection with the top of the inverted connector.
In the preferred scheme, the bottom of back-off joint is equipped with a plurality of moment of torsion inserted sheets, is equipped with a plurality of moment of torsion recesses at the top outer wall of rotatory head of giving up, and the moment of torsion inserted sheet inserts in the moment of torsion recess.
In the preferred scheme, the inner wall of the rotary throwing head is provided with an inner bulge, the outer wall of the locking claw throwing head is provided with a locking claw bulge, the inner bulge is in contact with the side surface of the locking claw bulge and forms interlocking, and the locking claw bulge is positioned below the inner bulge.
In a preferred scheme, the side surface of the inner protrusion, which is contacted with the locking claw protrusion, is an inclined surface;
the free ends of the locking claws tend to contract inwardly to unlock the inner projections from the locking claw projections in the axial direction.
According to the releasing device provided by the invention, the upper part is pressed, so that the pressed area of the functional sliding sleeve can be increased, the success rate of hydraulic releasing operation is greatly improved, and particularly the success rate of shearing off the shear pin and the pipe joint is increased. The torque transmission structure of the reversing connector and the rotary releasing head can also conveniently perform mechanical releasing operation after the hydraulic releasing operation fails, and the success rate of the releasing operation is greatly improved. The invention has the advantages of compact structure, higher success rate of operation, larger through-flow inner diameter of the device and no influence on the working efficiency of other pipe column sections.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic sectional view taken along line A-A in FIG. 1.
FIG. 3 is a schematic sectional view of B-B in FIG. 1.
FIG. 4 is a schematic cross-sectional view of C-C of FIG. 1.
FIG. 5 is a schematic cross-sectional view of D-D of FIG. 1.
Fig. 6 is a partially enlarged schematic view of fig. 1 at E.
Fig. 7 is a schematic structural view of the upper joint in the present invention.
Fig. 8 is a structural schematic diagram of the locking claw head of the invention.
Fig. 9 is a schematic sectional view F-F of fig. 8.
Fig. 10 is a schematic structural diagram of the rotary drop head of the present invention.
Fig. 11 is a cross-sectional structure diagram of the rotary throwing head of the present invention.
In the figure: the steel ball releasing device comprises an upper connector 1, an inner limiting step 101, a sealing barrel 2, a releasing steel ball 3, a sealing ring 4, a functional sliding sleeve 5, a steel ball seat part 51, an annular groove 52, a sliding sleeve protrusion 53, a shearing pin 6, a back-off connector 7, a sliding sleeve limiting protrusion 71, a locking claw releasing head 8, a locking claw protrusion 81, a locking claw depressed part 82, a locking claw 83, a rotary releasing head 9, an inner protrusion 91, a torque groove 92, an O-shaped sealing ring 10, a spring resetting sliding sleeve 11, a resetting spring 12, a spring inner protective sleeve 13 and a lower connector 14.
Detailed Description
The bottom and top portions are depicted in this example with reference to the orientation of FIG. 1, with the bottom portion to the right and the top portion to the left of FIG. 1.
As shown in fig. 1-11, a releasing device comprises an upper joint 1, an inverted joint 7, a functional sliding sleeve 5, a locking claw releasing head 8, a rotary releasing head 9 and a lower joint 14;
the upper joint 1 is in threaded connection with the back-off joint 7, the back-off joint 7 is in threaded connection with the locking jaw losing head 8, a rotary losing head 9 is arranged on an interlayer between the back-off joint 7 and the locking jaw losing head 8, the back-off joint 7 is connected with the rotary losing head 9 in a torque transmission mode, and the bottom of the rotary losing head 9 is in threaded connection with the lower joint 14;
the functional sliding sleeve 5 is slidably arranged in a cavity of the upper joint 1, the back-off joint 7 and the locking claw back-off head 8, a shear pin 6 for locking axial displacement is arranged between the functional sliding sleeve 5 and the upper joint 1, a steel ball seat part 51 for forming sealing with the back-off steel ball 3 is arranged at the upper end of the functional sliding sleeve 5, and a return spring 12 for returning the functional sliding sleeve 5 is arranged in the lower joint 14;
a protruding structure for mutually locking the axial position is arranged between the locking claw release head 8 and the rotary release head 9, a plurality of locking claws 83 are arranged at the bottom of the locking claw release head 8, a locking claw protrusion 81 for limiting the radial contraction of the locking claws 83 is arranged at the bottom end of the functional sliding sleeve 5, and an annular groove 52 for accommodating the locking claws 83 is arranged in the middle of the functional sliding sleeve 5. By the structure, a releasing steel ball can be put in from the top of the releasing device, drilling fluid is injected, a shear pin is cut off and is separated from the rotary releasing head 9 and the lower joint 14, and hydraulic releasing operation is completed; or after the releasing is failed, the rotary releasing head 9 is separated from the lower joint 14 through forward rotation, and the mechanical releasing operation is completed.
Preferably, as shown in fig. 1, a sealing cylinder 2 is further arranged between the upper joint 1 and the lower joint 14, the sealing cylinder 2 is located on the outer wall of the upper joint 1, the outer wall of the upper joint 1 is slidably connected with the sealing cylinder 2 through a sealing structure, and the bottom of the sealing cylinder 2 is in threaded or transitional connection with the lower joint 14. With this structure, it is convenient to protect each connection structure inside the sealing cylinder 2. Preferably, the lower joint 14 is in transition fit connection with the sealing cylinder 2.
Preferably, as shown in fig. 1, at least one sealing ring 4 is arranged between the inner wall of the upper joint 1 and the outer wall of the functional sliding sleeve 5. Preferably, the sealing rings 4 are arranged on the outer wall of the functional sliding sleeve 5, and the number of the sealing rings 4 is 4 along the axial direction. Therefore, the sealing effect of the drilling fluid is ensured.
In a preferred embodiment, as shown in fig. 1 and 2, the shear pins 6 are uniformly distributed along the circumference. According to the appropriate shear pressure value, appropriate parameters of the shear pin 6 are set.
In a preferred scheme, as shown in fig. 1 and 7, an inner limiting step 101 is arranged on the inner wall of the upper joint 1 to limit the axial position of the top of the functional sliding sleeve 5;
a sliding sleeve limiting bulge 71 is arranged on the inner wall of the back-off joint 7 to limit the axial position of the bottom of the functional sliding sleeve 5. By the structure, the functional sliding sleeve 5 can slide in a proper stroke range, and the structure is compact.
The preferable scheme is as shown in fig. 1, the inner wall of the lower joint 14 is in threaded connection with the inner spring protection sleeve 13, an annular slideway is formed between the inner spring protection sleeve 13 and the lower joint 14, the spring return sliding sleeve 11 and the return spring 12 are installed in the annular slideway, the top of the spring return sliding sleeve 11 is in contact with the bottom of the functional sliding sleeve 5, and the bottom of the spring return sliding sleeve 11 is in contact with the return spring 127. With the structure, the push function sliding sleeve 5 is convenient to reset.
In a preferred scheme, as shown in fig. 1, O-shaped sealing rings 10 are arranged on the inner wall and the outer wall of the spring return sliding sleeve 11, so that the spring return sliding sleeve 11 and the annular slideway form a sealing connection. By the structure, the failure of the spring return sliding sleeve 11 can be avoided, and the success rate of releasing operation is improved.
Preferably, as shown in fig. 1, the bottom of the upper connector 1 is screwed with the top of the inverted connector 7.
In a preferred scheme, as shown in fig. 1 and 3, a plurality of torque inserting sheets are arranged at the bottom of the back-off joint 7, a plurality of torque grooves 92 are arranged on the outer wall of the top of the rotary throwing head 9, and the torque inserting sheets are inserted into the torque grooves 92. With the structure, torque can be conveniently transmitted to the rotary releasing head 9 through the upper joint 1 and the back-off joint 7, so that the success rate of mechanical releasing operation can be conveniently ensured.
When the sliding sleeve bulge 53 supports against the locking claw 83, the back-off joint 7, the locking claw releasing head 8 and the rotating releasing head 9 are in interference fit to transmit torque.
In a preferred scheme, as shown in figure 1, an inner protrusion 91 is arranged on the inner wall of the rotary throw-away head 9, a locking claw protrusion 81 is arranged on the outer wall of a locking claw 83 of the locking claw throw-away head 8, the inner protrusion 91 is in contact with the side surface of the locking claw protrusion 81 to form interlocking, and the locking claw protrusion 81 is positioned below the inner protrusion 91.
In a preferred scheme, the side surface of the inner protrusion 91, which is contacted with the locking claw protrusion 81, is an inclined surface;
the free ends of the locking claws 83 tend to contract inwardly to unlock the inner projections 91 from the locking claw projections 81 in the axial direction. With the structure, the locking claw back-off head 8 and the rotating back-off head 9 can be conveniently separated under hydraulic pressure.
The upper joint 1 of the releasing device is connected with an upper part drill rod through threads, when releasing operation is carried out, a releasing steel ball 3 is put in, the releasing steel ball 3 stays at a steel ball seat part 51 at the top end of a functional sliding sleeve 5 under the action of self gravity and is matched with an arc-shaped step of the steel ball seat part 51, and the inner cavity of the upper joint is sealed. After the drilling fluid is injected, the internal pressure of the upper joint 1 is increased to a set value, the releasing steel ball 3 and the functional sliding sleeve 5 are pushed to move axially downwards, and after the shearing pin 6 is sheared, the spring return sliding sleeve 11 is pushed by the bottom of the functional sliding sleeve 5 to compress the return spring 12. The function sliding sleeve 5 moves to contact with the sliding sleeve limiting bulge 71 of the back-off joint 7 under the action of liquid pressure, the sliding sleeve bulge 53 of the function sliding sleeve 5 enters an annular slide way between the inner protective sleeve 13 of the spring and the lower joint 14, the locking claw 83 of the locking claw back-off head 8 retracts into the annular groove 52 of the function sliding sleeve 5, the locking claw bulge 81 releases the locking of the inner bulge 91 of the rotation back-off head 9, the rotation back-off head and the lower joint are separated from the back-off joint 7, the locking claw back-off head 8 and other parts on the upper portion together, and the back-off operation is completed.
When the liquid pressure in the upper joint 1 is gradually increased to a set value and the releasing operation can not be finished, a mechanical releasing operation scheme is adopted, and the method comprises the following specific steps: the upper joint 1 is connected with an upper part pipe column, the lower end of the upper joint is connected with the back-off joint 7 through threads, the axial position of the functional sliding sleeve 5 is arranged between the inner limiting step 101 of the upper joint 1 and the back-off joint 7 and the sliding sleeve limiting bulge 71, the top end of the rotary losing head 9 is connected with the back-off joint 7 in a torque transmission mode, the bottom end of the rotary losing head is in threaded connection with the annular inner wall of the lower joint, the pipe column is rotated in the forward direction, the upper joint 1 drives the back-off joint 7 and the locking claw losing head 8 to rotate in the forward direction, when the rotation torque is larger than the resistance torque between the rotary losing head 9 and the lower joint 14, the rotary losing head 9 is separated from the lower joint 14, and the lower joint 14 is further separated from the connecting part of the sealing barrel 2 and the upper joint 1 due to the gravity of the lower part of the pipe column, so that the mechanical releasing operation is completed.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (5)
1. A releasing device is characterized in that: the device comprises an upper joint (1), a back-off joint (7), a functional sliding sleeve (5), a locking claw release head (8), a rotary release head (9) and a lower joint (14);
the upper joint (1) is in threaded connection with the back-off joint (7), the back-off joint (7) is in threaded connection with the locking claw losing head (8), a rotary losing head (9) is arranged on an interlayer between the back-off joint (7) and the locking claw losing head (8), the back-off joint (7) is connected with the rotary losing head (9) in a torque transmission mode, and the bottom of the rotary losing head (9) is in threaded connection with the lower joint (14);
the functional sliding sleeve (5) is slidably arranged in a cavity of the upper joint (1), the back-off joint (7) and the locking claw lost head (8), a shear pin (6) for locking axial displacement is arranged between the functional sliding sleeve (5) and the upper joint (1), a steel ball seat part (51) for forming sealing with the releasing steel ball (3) is arranged at the upper end of the functional sliding sleeve (5), and a return spring (12) for returning the functional sliding sleeve (5) is arranged in the lower joint (14);
the inner wall of the lower joint (14) is in threaded connection with an inner spring protection sleeve (13), an annular slideway is formed between the inner spring protection sleeve (13) and the lower joint (14), a spring reset sliding sleeve (11) and a reset spring (12) are installed in the annular slideway, the top of the spring reset sliding sleeve (11) is in contact with the bottom of the functional sliding sleeve (5), and the bottom of the spring reset sliding sleeve (11) is in contact with the reset spring (12);
an inner limiting step (101) is arranged on the inner wall of the upper joint (1) to limit the axial position of the top of the functional sliding sleeve (5);
a sliding sleeve limiting bulge (71) is arranged on the inner wall of the back-off joint (7) to limit the axial position of the bottom of the functional sliding sleeve (5);
a protruding structure for mutually locking the axial position is arranged between the locking claw release head (8) and the rotary release head (9), a plurality of locking claws (83) are arranged at the bottom of the locking claw release head (8), a locking claw protrusion (81) for limiting the radial contraction of the locking claws (83) is arranged at the bottom end of the functional sliding sleeve (5), and an annular groove (52) for accommodating the locking claws (83) is arranged in the middle of the functional sliding sleeve (5);
the bottom of the upper joint (1) is in threaded connection with the top of the inverted joint (7);
the bottom of the back-off joint (7) is provided with a plurality of torque inserting sheets, the outer wall of the top of the rotary throwing head (9) is provided with a plurality of torque grooves (92), and the torque inserting sheets are inserted into the torque grooves (92);
an inner bulge (91) is arranged on the inner wall of the rotary throw-up head (9), a locking claw bulge (81) is arranged on the outer wall of a locking claw (83) of the locking claw throw-up head (8), the inner bulge (91) is in contact with the side surface of the locking claw bulge (81) to form interlocking, and the locking claw bulge (81) is positioned below the inner bulge (91);
the side surface of the inner protrusion (91) contacted with the locking claw protrusion (81) is an inclined surface;
the free end of the locking claw (83) tends to contract inwards to release the axial locking of the inner protrusion (91) and the locking claw protrusion (81);
after the shearing pin (6) is sheared, the bottom of the functional sliding sleeve (5) pushes the spring return sliding sleeve (11) to compress the return spring (12); the functional sliding sleeve (5) moves to a sliding sleeve limiting bulge (71) of the back-off joint (7) to contact under the action of liquid pressure, a sliding sleeve bulge (53) of the functional sliding sleeve (5) enters an annular slide way between a spring inner protective sleeve (13) and the lower joint (14), a locking claw (83) of a locking claw back-off head (8) retracts inwards to enter an annular groove (52) of the functional sliding sleeve (5), the locking claw bulge (81) releases locking of an inner bulge (91) of a rotating back-off head (9), the rotating back-off head and the lower joint are separated from the back-off joint (7) and the locking claw back-off head (8) on the upper portion, and the back-off operation is completed.
2. A releasing device as claimed in claim 1, wherein: a sealing barrel (2) is further arranged between the upper joint (1) and the lower joint (14), the sealing barrel (2) is located on the outer wall of the upper joint (1), the outer wall of the upper joint (1) is in sliding connection with the sealing barrel (2) through a sealing structure, and the bottom of the sealing barrel (2) is in threaded or transitional connection with the lower joint (14).
3. A releasing device as claimed in claim 1, wherein: at least one sealing ring (4) is arranged between the inner wall of the upper joint (1) and the outer wall of the functional sliding sleeve (5).
4. A releasing device as claimed in claim 1, wherein: the shear pins (6) are uniformly distributed along the circumference.
5. A releasing device as claimed in claim 1, wherein: the inner wall and the outer wall of the spring return sliding sleeve (11) are respectively provided with an O-shaped sealing ring (10) so that the spring return sliding sleeve (11) and the annular slideway form sealing connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811305699.7A CN109339725B (en) | 2018-11-05 | 2018-11-05 | Releasing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811305699.7A CN109339725B (en) | 2018-11-05 | 2018-11-05 | Releasing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109339725A CN109339725A (en) | 2019-02-15 |
| CN109339725B true CN109339725B (en) | 2021-11-02 |
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ID=65313663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811305699.7A Expired - Fee Related CN109339725B (en) | 2018-11-05 | 2018-11-05 | Releasing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109339725B (en) |
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| CN202108439U (en) * | 2011-05-13 | 2012-01-11 | 中国石油天然气股份有限公司 | Releasing tool |
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| CN102797429A (en) * | 2012-08-17 | 2012-11-28 | 中国海洋石油总公司 | Suspending releasing sand preventing completion packer |
| CN102966339A (en) * | 2012-12-09 | 2013-03-13 | 李运柱 | Insertion pipe type release separate-layer water injection string and operation process thereof |
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| Publication number | Publication date |
|---|---|
| CN109339725A (en) | 2019-02-15 |
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