CN220151311U - Underground throttle fishing device - Google Patents
Underground throttle fishing device Download PDFInfo
- Publication number
- CN220151311U CN220151311U CN202321196744.6U CN202321196744U CN220151311U CN 220151311 U CN220151311 U CN 220151311U CN 202321196744 U CN202321196744 U CN 202321196744U CN 220151311 U CN220151311 U CN 220151311U
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- Prior art keywords
- lifting
- locking claw
- sheath
- split
- split locking
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- 210000000078 claw Anatomy 0.000 claims abstract description 114
- 238000010008 shearing Methods 0.000 claims abstract description 19
- 230000001360 synchronised effect Effects 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 210000001503 joint Anatomy 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000002343 natural gas well Substances 0.000 abstract description 3
- 230000017105 transposition Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to the technical field of working tools for natural gas wells, and provides an underground throttle fishing device which comprises a delivery joint, split locking claws, a disjointing shear pin, a lifting sheath and a lifting lock sleeve, wherein a reset top spring is connected between the inner end of an indexing top pin and the delivery joint, and the lifting sheath has a rotational degree of freedom and a lifting degree of freedom by means of separation of the indexing top pin and a through hole; the lifting lock sleeve is contacted with the first shoulder to form an opening structure at the lower end of the split locking claw, and the lifting lock sleeve is contacted with the lower end of the split locking claw to form a locking structure at the lower end of the split locking claw; the convex edge and the notch are in sliding fit to form a synchronous upward movement mechanism of the delivery joint and the lifting sheath, and the convex edge and the notch are separated to form an upward movement mechanism of the lifting sheath. The problems that in the related technology, a part of the sheared disjointed shearing pin can be taken out of a wellhead, but still a part of the sheared disjointed shearing pin remains underground to become a down-hole falling object, and the occurrence of a drill jam of a fished choke is easily caused are solved.
Description
Technical Field
The utility model relates to the technical field of working tools for natural gas wells, in particular to a downhole choke salvaging device.
Background
In the exploitation process of the high-pressure natural gas well, in order to reduce the pressure of a wellhead, control the gas production and prevent the wellhead from generating hydrate blockage, a downhole air tap throttling gas exploitation process is generally adopted.
At present, the slip type underground throttler widely applied depends on the fact that a steel wire is delivered to an underground design position from an oil pipe, the throttler is clamped and sealed by upward shock, and finally a disjointing shear pin of a delivery tool is sheared off, so that the delivery tool is separated from a joint of the throttler releasing, and the delivery tool is lifted out of a wellhead. The sheared disjoint shearing pin can be partially taken out of the wellhead, but still some of the disjoint shearing pin remains underground to form underground junk, so that the occurrence of the drill sticking accident of the choke salvage is easily caused, and the problem that the sheared disjoint shearing pin of the delivery tool is lifted out of the wellhead and does not generate underground junk must be solved.
Disclosure of Invention
The utility model provides an underground throttle salvaging device, which solves the problems that in the related art, a part of a sheared disjointed shearing pin can be taken out of a wellhead, but still a part of the sheared disjointed shearing pin remains underground to become underground junk, and the occurrence of a throttle salvaging and drill clamping accident is easy to happen.
The technical scheme of the utility model is as follows: the utility model provides a downhole choke fishing device, includes and delivers the joint, sets up at the peripheral split locking claw of delivering the joint, and connects the disjointing shear pin between delivering joint and split locking claw, and the key lies in: the device also comprises a lifting sheath arranged on the periphery of the split locking claw and a lifting locking sleeve connected between the inner wall of the lower end of the lifting sheath and the outer wall of the split locking claw, a through hole is formed in the side wall of the upper end of the lifting sheath, an indexing ejector pin is inserted into the side wall of the delivery joint, a reset ejector spring is connected between the inner end of the indexing ejector pin and the delivery joint, the outer end of the indexing ejector pin and the through hole in the lifting sheath are inserted into a locking structure of the lifting sheath and the delivery joint, and the lifting sheath has a rotational degree of freedom and a lifting degree of freedom by means of separation of the indexing ejector pin and the through hole;
the upper end of the outer wall of the split locking claw is provided with a first shoulder, the lifting lock sleeve is contacted with the first shoulder by means of the upward movement of the lifting sheath to form an opening structure of the lower end of the split locking claw, and the lifting lock sleeve is contacted with the lower end of the split locking claw by means of the downward movement of the lifting sheath to form a locking structure of the lower end of the split locking claw;
an annular limiting groove is formed in the side wall of the delivery connector, a convex edge protruding inwards is arranged on the inner wall of the upper end of the lifting sheath, a notch matched with the convex edge in shape is formed in the side wall of the delivery connector above the annular limiting groove, the transposition ejector pin is located below the notch, the convex edge and the notch are in sliding fit to form a synchronous upward moving mechanism of the delivery connector and the lifting sheath, and the convex edge and the notch are separated to form an upward moving mechanism of the lifting sheath.
The lifting lock sleeve is in threaded connection with the lifting sheath.
The lifting lock sleeve and the lifting sheath are riveted by means of cylindrical pins.
The inner wall of the lower end of the lifting sheath is provided with a mounting groove, and the upper end face of the lifting lock sleeve is contacted with the top face of the mounting groove.
The device also comprises a pressure spring screw, the inner end of the pressure spring screw is connected with the delivery joint, and the outer end of the pressure spring screw is connected with the reset top spring.
The side wall of the delivery joint is provided with a second shoulder, and the upper end face of the split locking claw is contacted with the second shoulder to form an upper limit structure of the split locking claw.
The split locking claw comprises a cylinder body and a group of split claws formed by downward extension of the lower end surface of the cylinder body, the split shearing pins are connected with the cylinder body, all the split claws are arranged along the circumferential direction of the cylinder body, gaps are reserved between adjacent split claws, the inner wall of the lower end of each split claw protrudes inwards to form a clamping block, clamping grooves are formed in the side wall of the underground throttle releasing butt joint, and the clamping blocks are clamped with the clamping grooves to form an anti-falling structure of the split locking claw and the underground throttle releasing butt joint.
The outer wall of each split locking claw is provided with a limiting bulge, the inner wall of the lower end of the pulling lock sleeve is provided with an annular limiting groove, and the limiting bulge and the annular limiting groove are clamped to form a lower limiting structure of the pulling lock sleeve.
The indexing ejector pin and the reset ejector spring are both positioned at the annular limiting groove.
The side wall of the lifting sheath is provided with a pair of perforations for disassembling the disjointing shear pin.
The working principle and the beneficial effects of the utility model are as follows: a lifting sheath is arranged on the periphery of the split locking claw, a lifting lock sleeve is arranged between the inner wall of the lower end of the lifting sheath and the outer wall of the split locking claw, a through hole is formed in the side wall of the upper end of the lifting sheath, an indexing ejector pin is inserted into the side wall of the delivery joint, a reset ejector spring is connected between the inner end of the indexing ejector pin and the delivery joint, the outer end of the indexing ejector pin is inserted into the through hole on the lifting sheath to form a locking structure of the lifting sheath and the delivery joint, and the lifting sheath has a rotational degree of freedom and a lifting degree of freedom by means of separation of the indexing ejector pin and the through hole; the upper end of the outer wall of the split locking claw is provided with a first shoulder, the lifting lock sleeve is contacted with the first shoulder by means of the upward movement of the lifting sheath to form an opening structure of the lower end of the split locking claw, and the lifting lock sleeve is contacted with the lower end of the split locking claw by means of the downward movement of the lifting sheath to form a locking structure of the lower end of the split locking claw; an annular limiting groove is formed in the side wall of the delivery connector, a convex edge protruding inwards is arranged on the inner wall of the upper end of the lifting sheath, a notch matched with the convex edge in shape is formed in the side wall of the delivery connector above the annular limiting groove, the transposition ejector pin is located below the notch, the convex edge and the notch are in sliding fit to form a synchronous upward moving mechanism of the delivery connector and the lifting sheath, and the convex edge and the notch are separated to form an upward moving mechanism of the lifting sheath.
During installation, the delivery joint is inserted from the inner hole at the upper end of the split locking claw, the split locking claw is connected in a penetrating way through the split shearing pin, the outer surface of the split locking claw is sleeved with the lifting lock sleeve and the lifting sheath, the split shearing pin is sleeved inside the split locking claw, the lifting lock sleeve and the lifting sheath are connected into a whole, and the lifting sheath is hung through an annular limiting groove on the delivery joint and is locked with the delivery joint through the transposition jacking pin. When the delivery joint is lifted, the split locking claw and the underground throttle releasing butt joint are reliably connected, so that the delivery joint and the split locking claw move relatively, the split shear pin is sheared off, the lifting sheath and the lifting lock sleeve are continuously lifted to move upwards, the split locking claw is separated from the underground throttle releasing butt joint, after the split shear pin is sheared off, one part of the split locking claw moves upwards along with the delivery joint and is taken out of the wellhead, and the other part of the split locking claw moves upwards along with the split locking claw and is taken out of the wellhead, thereby the delivery tool can be completely taken out of the wellhead, the salvaging success rate of the slip type underground throttle without underground falling objects can be improved, and the probability of the occurrence of the blocking of the throttle is reduced.
Drawings
The utility model will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a schematic structural view of the present utility model.
FIG. 2 is a schematic view of the delivery adapter of the present utility model.
Fig. 3 is a schematic diagram of the position of the notch in the present utility model.
FIG. 4 is a schematic view of the connection structure of the transfer pin and the delivery connector according to the present utility model.
Fig. 5 is a schematic structural view of a pulling sheath according to the present utility model.
Fig. 6 is a schematic view of the internal structure of the pulling sheath according to the present utility model.
Fig. 7 is a top view of a pull-up sheath of the present utility model.
Fig. 8 is a schematic structural view of the split locking claw in the present utility model.
Fig. 9 is a partial cross-sectional view of a split pawl according to the present utility model.
Fig. 10 is a schematic view of the structure of the utility model when the lower end of the split locking claw is opened.
FIG. 11 is a schematic view of the structure of the split locking claw of the present utility model clamping a downhole choke release abutment.
Fig. 12 is a schematic view of the structure of the present utility model after the disjoint shear pin is sheared.
In the figure: 1. the device comprises a delivery connector, a lifting sheath, a 3-section shearing pin, a 4-section locking claw, a 5-section cylindrical pin, a 6-section lifting lock sleeve, a 7-section transposition ejector pin, a 8-section resetting ejector spring, a 9-section pressure spring screw, a 10-section downhole throttle releasing butt joint, a 11-section first shoulder, a 12-section annular limiting groove, a 13-section flange, a 14-section opening, a 15-section second shoulder, a 16-section clamping block, a 17-section clamping groove, a 18-section limiting protrusion, a 19-section butt perforation.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments of the present utility model, are intended to be encompassed within the scope of the present utility model.
1, 3, 7, 10, 11 and 12, the downhole choke fishing device comprises a delivery joint 1, a split locking claw 4 arranged at the periphery of the delivery joint 1, a split shear pin 3 connected between the delivery joint 1 and the split locking claw 4, a lifting sheath 2 arranged at the periphery of the split locking claw 4, and a lifting lock sleeve 6 connected between the inner wall of the lower end of the lifting sheath 2 and the outer wall of the split locking claw 4, wherein a through hole is formed in the side wall of the upper end of the lifting sheath 2, an indexing top pin 7 is inserted into the side wall of the delivery joint 1, a reset top spring 8 is connected between the inner end of the indexing top pin 7 and the delivery joint 1, the outer end of the indexing top pin 7 is inserted into the through hole of the lifting sheath 2 to form a locking structure of the lifting sheath 2 and the delivery joint 1, and the lifting sheath 2 has a rotational degree of freedom and a lifting degree of freedom by separating the indexing top pin 7 from the through hole;
a first shoulder 11 is arranged at the upper end of the outer wall of the split locking claw 4, the lifting lock sleeve 6 is contacted with the first shoulder 11 by means of the upward movement of the lifting sheath 2 to form an opening structure at the lower end of the split locking claw 4, and the lifting lock sleeve 6 is contacted with the lower end of the split locking claw 4 by means of the downward movement of the lifting sheath 2 to form a locking structure at the lower end of the split locking claw 4;
an annular limiting groove 12 is formed in the side wall of the delivery joint 1, a convex edge 13 protruding inwards is arranged on the inner wall of the upper end of the lifting sheath 2, a notch 14 matched with the convex edge 13 in shape is formed in the side wall of the delivery joint 1 above the annular limiting groove 12, the indexing ejector pin 7 is located below the notch 14, the convex edge 13 and the notch 14 are in sliding fit to form a synchronous upward movement mechanism of the delivery joint 1 and the lifting sheath 2, and the convex edge 13 and the notch 14 are separated to form an upward movement mechanism of the lifting sheath 2. Both the indexing ejector pin 7 and the reset ejector spring 8 are positioned at the annular limiting groove 12.
As a further improvement of the utility model, the lifting lock sleeve 6 is in threaded connection with the lifting sheath 2, so that the connection is firm and reliable, the disassembly and the assembly are convenient and quick, and the time and the labor are saved. The lifting lock sleeve 6 is riveted with the lifting sheath 2 by means of the cylindrical pin 5, as shown in fig. 1, 10, 11 and 12, after the lifting lock sleeve 6 is in threaded connection with the lifting sheath 2, the lifting lock sleeve 6 is riveted with the lifting sheath 2 by means of the cylindrical pin 5, so that the connection between the lifting lock sleeve 6 and the lifting sheath 2 is firmer and more reliable.
As a further improvement of the utility model, an installation groove is formed on the inner wall of the lower end of the lifting sheath 2, and the upper end face of the lifting lock sleeve 6 is contacted with the top face of the installation groove. As shown in fig. 1, 6, 10, 11 and 12, the mounting groove can play a limiting role, and when the upper end surface of the lifting lock sleeve 6 contacts with the top surface of the mounting groove, the lifting lock sleeve 6 cannot move upwards continuously, so that the mounting is in place, and the operation is simpler.
As a further improvement of the utility model, the device also comprises a pressure spring screw 9, wherein the inner end of the pressure spring screw 9 is connected with the delivery joint 1, and the outer end of the pressure spring screw 9 is connected with the reset top spring 8. As shown in fig. 4, during installation, the reset top spring 8 is connected with the pressure spring screw 9, then the pressure spring screw 9 is connected with the delivery joint 1, and then the transposition top pin 7 is connected with the outer end of the reset top spring 8, so that the connection between the reset top spring 8 and the delivery joint 1 is firmer and more reliable.
As a further improvement of the utility model, a second shoulder 15 is arranged on the side wall of the delivery joint 1, and the upper end surface of the split locking claw 4 is contacted with the second shoulder 15 to form an upper limit structure of the split locking claw 4. As shown in fig. 1, 2, 10, 11 and 12, in the process of moving up the split locking claw 4, after the upper end surface of the split locking claw 4 contacts with the second shoulder 15, the split locking claw 4 cannot move up continuously, which means that the split locking claw 4 moves up to a proper position, and can effectively play a limiting role.
As a further improvement of the utility model, the split locking claw 4 comprises a cylinder body 4-1 and a group of split claws 4-2 formed by downward extension of the lower end surface of the cylinder body 4-1, the split shear pin 3 is connected with the cylinder body 4-1, all the split claws 4-2 are arranged along the circumferential direction of the cylinder body 4-1, gaps are reserved between the adjacent split claws 4-2, the inner wall of the lower end of each split claw 4-2 protrudes inwards to form a clamping block 16, the side wall of the downhole throttle releasing butt joint 10 is provided with a clamping groove 17, and the clamping block 16 is clamped with the clamping groove 17 to form an anti-disengaging structure of the split locking claw 4 and the downhole throttle releasing butt joint 10. As shown in fig. 8, 9, 10, 11 and 12, the four claws 4-2 are uniformly arranged along the circumferential direction of the cylinder 4-1, the clamping groove 17 is an annular groove, and the upper end and the lower end of the clamping groove 17 are provided with chamfers, so that the clamping block 16 can be conveniently clamped or separated with the clamping groove 17.
As a further improvement of the utility model, the outer wall of each claw 4-2 of the split locking claw 4 is provided with a limiting bulge 18, the inner wall of the lower end of the lifting lock sleeve 6 is provided with an annular limiting groove, and the limiting bulge 18 and the annular limiting groove are clamped to form a lower limiting structure of the lifting lock sleeve 6. As shown in fig. 9, 10, 11 and 12, in the process of moving the lifting lock sleeve 6 downwards, after the limiting protrusion 18 contacts with the lifting lock sleeve 6, the lifting lock sleeve 6 cannot move downwards continuously, which indicates that the lifting lock sleeve is adjusted in place, and can effectively play a role in limiting reminding.
As a further development of the utility model, the side wall of the lifting sheath 2 is provided with a counter-perforation 19 for detaching the disjoint shear pin 3. As shown in fig. 5, 6, 10, 11 and 12, two sets of upper and lower opposite perforations 19 are provided on the lifting sheath 2, when the opposite perforations 19 on the lifting sheath 2 are aligned with the scissor pin holes on the delivery joint 1, two sections of disjointed scissor pins 3 on the delivery joint 1 can be taken out, the split locking claw 4 is pushed upwards and rotated, and when the scissor pin holes on the split locking claw 4 are aligned with the opposite perforations 19 on the lifting sheath 2, two sections of disjointed scissor pins 3 on the split locking claw 4 can be taken out, so that the operation is simpler and more convenient.
When the split locking claw 4 is specifically used, during installation, the split locking claw 4 is sleeved from the lower part of the delivery joint 1 and pushed upwards to the second shoulder 15 of the delivery joint 1, so that the split shear pin 3 penetrates through the split locking claw 4 and the opposite perforation of the delivery joint 1 to connect the split locking claw 4 with the delivery joint 1 into a whole; then the lifting sheath 2 is sleeved from the upper part of the delivery joint 1, the outer end of the transposition ejector pin 7 is spliced with a through hole on the lifting sheath 2, the lifting lock sleeve 6 is sleeved from the lower part of the split lock claw 4, and the lifting sheath 2 and the lifting lock sleeve 6 are connected through threads and are riveted into a whole by the cylindrical pin 5, as shown in figure 1.
The indexing ejector pin 7 is pressed and the lifting sheath 2 is rotated to align the two protruding edges 13 on the lifting sheath 2 with the two openings 14 on the delivery connector 1, the lifting sheath 2 is pushed upwards, the lifting sheath 2 drives the lifting lock sleeve 6 to move upwards until the lifting lock sleeve 6 abuts against the first shoulder 11 of the split locking claw 4, and at the moment, the lower end of the split locking claw 4 can be opened, as shown in fig. 10.
The clamping blocks 16 on the inner sides of the claw 4-2 of the split locking claw 4 are sleeved into the clamping grooves 17 of the underground throttle releasing butt joint 10, then the lifting sheath 2 is pushed downwards, the lifting sheath 2 drives the lifting sheath 6 to move downwards synchronously until the lifting sheath 6 is limited by the limiting protrusions 18 on the outer sides of the claw 4-2 of the split locking claw 4 and cannot move, at the moment, the lifting sheath 6 clamps the claw 4-2 of the split locking claw 4, the four claw 4-2 of the split locking claw 4 cannot be opened, and the split locking claw 4 and the underground throttle releasing butt joint 10 are kept in butt joint and fixed and cannot move, as shown in fig. 11.
The lifting sheath 2 is rotated until the indexing ejector pin 7 pops up and plugs into a through hole in the lifting sheath 2. When the well testing steel wire is jarred upwards to lift the delivery joint 1, as the split locking claw 4 is reliably connected with the downhole throttler releasing butt joint 10, the delivery joint 1 and the split locking claw 4 are relatively moved, the split shear pin 3 is sheared, a part of the split shear pin 3 is left in the delivery joint 1, a part of the split shear pin 3 is left in the split locking claw 4, the delivery joint 1 is continuously lifted upwards, when the lifting sheath 2 is contacted with the lower end face of the annular limiting groove 12, the delivery joint 1 drives the lifting sheath 6 to synchronously move upwards through the lifting sheath 2, when the lifting sheath 6 is contacted with the first shoulder 11 on the split locking claw 4, the lifting sheath 2, the lifting sheath 6 and the split locking claw 4 are continuously lifted upwards, the outside of the split locking claw 4 is limited by the lifting sheath 6, and the four claws 4-2 of the split locking claw 4 are opened, and the downhole throttler is released from the split locking claw 4, and the downhole throttler is released as shown in the joint 12.
When the gas production well is lifted along with the well testing steel wire to the ground, the indexing ejector pin 7 is pressed and the lifting sheath 2 is rotated, so that two convex edges 13 on the lifting sheath 2 are aligned with two notches 14 on the delivery joint 1, the lifting sheath 2 is pushed upwards, when the opposite perforation on the lifting sheath 2 is aligned with the shearing pin hole on the delivery joint 1, the two sections of disjointed shearing pins 3 on the delivery joint 1 are taken out, the split locking claw 4 is pushed upwards and rotated, and when the shearing pin hole on the split locking claw 4 is aligned with the opposite perforation on the lifting sheath 2, the two sections of disjointed shearing pins 3 on the split locking claw 4 are taken out.
After the disjoint shearing pin 3 is sheared, one part of the disjoint shearing pin is carried out of the wellhead along with the upward movement of the delivery joint 1, and the other part of the disjoint shearing pin is carried out of the wellhead along with the upward movement of the split locking claw 4, so that the delivery of the slip type underground throttler without underground falling objects can be realized, the salvaging success rate of the slip type underground throttler can be improved, and the probability of the occurrence of the salvaging and jamming accidents of the throttler can be reduced.
Claims (10)
1. The utility model provides a downhole choke fishing device, includes delivery joint (1), sets up at delivery joint (1) peripheral split locking claw (4), and connects and cut round pin (3) with the dislocation between split locking claw (4) delivery joint (1), its characterized in that: the device further comprises a lifting sheath (2) arranged on the periphery of the split locking claw (4) and a lifting lock sleeve (6) connected between the inner wall of the lower end of the lifting sheath (2) and the outer wall of the split locking claw (4), a through hole is formed in the side wall of the upper end of the lifting sheath (2), an indexing ejector pin (7) is inserted into the side wall of the delivery joint (1), a reset ejector spring (8) is connected between the inner end of the indexing ejector pin (7) and the delivery joint (1), the outer end of the indexing ejector pin (7) and the through hole in the lifting sheath (2) are inserted into a locking structure of the lifting sheath (2) and the delivery joint (1), and the lifting sheath (2) has a rotational degree of freedom and a lifting degree of freedom by means of separation of the indexing ejector pin (7) and the through hole;
a first shoulder (11) is arranged at the upper end of the outer wall of the split locking claw (4), the lifting lock sleeve (6) is contacted with the first shoulder (11) by means of the upward movement of the lifting sheath (2) to form an opening structure at the lower end of the split locking claw (4), and the lifting lock sleeve (6) is contacted with the lower end of the split locking claw (4) by means of the downward movement of the lifting sheath (2) to form a locking structure at the lower end of the split locking claw (4);
an annular limiting groove (12) is formed in the side wall of the delivery joint (1), a convex edge (13) protruding inwards is arranged on the inner wall of the upper end of the lifting sheath (2), a notch (14) matched with the convex edge (13) in shape is formed in the side wall of the delivery joint (1) above the annular limiting groove (12), an indexing ejector pin (7) is located below the notch (14), the convex edge (13) and the notch (14) are in sliding fit to form a synchronous upward moving mechanism of the delivery joint (1) and the lifting sheath (2), and the convex edge (13) and the notch (14) are separated to form an upward moving mechanism of the lifting sheath (2).
2. The downhole choke fishing device of claim 1, wherein: the lifting lock sleeve (6) is in threaded connection with the lifting sheath (2).
3. A downhole choke fishing device according to claim 2, wherein: the lifting lock sleeve (6) is riveted with the lifting sheath (2) by means of a cylindrical pin (5).
4. The downhole choke fishing device of claim 1, wherein: the inner wall of the lower end of the lifting sheath (2) is provided with a mounting groove, and the upper end surface of the lifting lock sleeve (6) is contacted with the top surface of the mounting groove.
5. The downhole choke fishing device of claim 1, wherein: the device also comprises a pressure spring screw (9), wherein the inner end of the pressure spring screw (9) is connected with the delivery joint (1), and the outer end of the pressure spring screw (9) is connected with the reset top spring (8).
6. The downhole choke fishing device of claim 1, wherein: the side wall of the delivery joint (1) is provided with a second shoulder (15), and the upper end surface of the split locking claw (4) is contacted with the second shoulder (15) to form an upper limit structure of the split locking claw (4).
7. The downhole choke fishing device of claim 1, wherein: the split locking claw (4) comprises a cylinder body (4-1) and a group of split claws (4-2) formed by downward extension of the lower end surface of the cylinder body (4-1), the split shearing pin (3) is connected with the cylinder body (4-1), all the split claws (4-2) are arranged along the circumferential direction of the cylinder body (4-1), gaps are reserved between adjacent split claws (4-2), the inner wall of the lower end of each split claw (4-2) protrudes inwards to form a clamping block (16), clamping grooves (17) are formed in the side wall of the downhole throttle release butt joint (10), and the clamping blocks (16) are clamped with the clamping grooves (17) to form an anti-release structure of the split locking claw (4) and the downhole throttle release butt joint (10).
8. The downhole choke fishing device of claim 1, wherein: the outer wall of each split claw (4-2) of the split locking claw (4) is provided with a limiting bulge (18), the inner wall of the lower end of the lifting lock sleeve (6) is provided with an annular limiting groove, and the limiting bulge (18) and the annular limiting groove are clamped to form a lower limiting structure of the lifting lock sleeve (6).
9. The downhole choke fishing device of claim 1, wherein: the indexing ejector pin (7) and the reset ejector spring (8) are both positioned at the annular limiting groove (12).
10. The downhole choke fishing device of claim 1, wherein: the side wall of the lifting sheath (2) is provided with a pair of perforations (19) for disassembling the disjointing shear pin (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321196744.6U CN220151311U (en) | 2023-05-17 | 2023-05-17 | Underground throttle fishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321196744.6U CN220151311U (en) | 2023-05-17 | 2023-05-17 | Underground throttle fishing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220151311U true CN220151311U (en) | 2023-12-08 |
Family
ID=89011862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321196744.6U Active CN220151311U (en) | 2023-05-17 | 2023-05-17 | Underground throttle fishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220151311U (en) |
-
2023
- 2023-05-17 CN CN202321196744.6U patent/CN220151311U/en active Active
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