CN114482887B

CN114482887B - Underground gas lift valve throwing and fishing device and throwing and fishing method

Info

Publication number: CN114482887B
Application number: CN202011161236.5A
Authority: CN
Inventors: 杨军征; 崔明月; 邹洪岚; 王青华
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2024-01-30
Anticipated expiration: 2040-10-27
Also published as: CN114482887A

Abstract

The invention provides a throwing and fishing device and a throwing and fishing method for an underground gas lift valve, wherein the throwing and fishing device comprises a tool cylinder, a fishing driving device arranged in the tool cylinder and a throwing driving device arranged in the tool cylinder, and a fishing window and a throwing window are arranged on the side wall of the tool cylinder; the salvage driving device can be connected with a salvage head for salvaging the gas lift valve, and can drive the salvage head to move out of and move into the tool cylinder through the salvage window; the throwing driving device can be connected with a throwing head for throwing the gas lift valve, and can drive the throwing head to move out of and move into the tool cylinder through the throwing window. The underground gas lift valve throwing and fishing device can finish two operations of fishing and throwing the gas lift valve only by one time of entering the shaft, and can effectively improve the operation efficiency of replacing the gas lift valve.

Description

Underground gas lift valve throwing and fishing device and throwing and fishing method

Technical Field

The invention relates to the technical field of oil extraction engineering, in particular to a downhole gas lift valve throwing and fishing device and a throwing and fishing method.

Background

Gas lift oil recovery is one of the most widely used artificial lifting modes at present, and is to inject high-pressure gas from the ground to the underground, mix the high-pressure gas with oil layer produced liquid in a shaft, and reduce the sealing of liquid in the shaft by using the expansion of the gas so as to lift the crude oil flowing into the shaft to the ground.

The gas lift valve is an important tool for gas lift oil extraction, is usually installed in an eccentric working cylinder on an oil pipe column, and is used for communicating an oil sleeve annulus with the oil pipe, and high-pressure gas is injected into the oil sleeve annulus from a wellhead and then is injected into the oil pipe through the gas lift valve. When the gas lift valve breaks down, the gas lift valve needs to be replaced, the existing method for replacing the gas lift valve by the throwing and fishing tool is that firstly, a fishing head is installed on the throwing and fishing tool, the throwing and fishing tool is put into a shaft to salvage the old gas lift valve, after the old gas lift valve is fished to the ground through a steel wire rope, the fishing head is taken down, the throwing head provided with a new gas lift valve is installed on the throwing and fishing tool, the throwing and fishing tool is put into the shaft again, after the new gas lift valve is thrown into an eccentric working cylinder, the steel wire rope is lifted, the throwing and fishing tool is lifted to the ground, and the replacement of the gas lift valve is completed. Therefore, the gas lift valve is replaced by the existing throwing and fishing tool, the operation of throwing and fishing tools needs to be completed twice, and the operation efficiency of replacing the gas lift valve is low.

Disclosure of Invention

The invention aims to provide a downhole gas lift valve throwing and fishing device and a throwing and fishing method, which are used for solving the problem that in the prior art, the replacement of a gas lift valve needs to finish the operation of lifting and fishing tools twice and the operation efficiency of replacing the gas lift valve is low.

In order to achieve the above purpose, the invention provides a downhole gas lift valve throwing and fishing device, which comprises a tool cylinder, a fishing driving device arranged in the tool cylinder and a throwing driving device arranged in the tool cylinder, wherein a fishing window and a throwing window are arranged on the side wall of the tool cylinder; the salvage driving device can be connected with a salvage head for salvaging the gas lift valve, and can drive the salvage head to move out of and into the tool cylinder through the salvage window; the throwing driving device can be connected with a throwing head for throwing the gas lift valve, and can drive the throwing head to move out of and move into the tool cylinder through the throwing window.

The invention also provides an underground gas lift valve throwing and fishing method, which adopts the underground gas lift valve throwing and fishing device to finish gas lift valve throwing and fishing operation and gas lift valve throwing and fishing operation, and comprises the following steps: loading a fishing head into the tool cylinder, connecting the fishing head with the fishing driving device, loading a throwing head connected with a new gas lift valve into the tool cylinder, and connecting the throwing head with the throwing driving device; the underground gas lift valve throwing and fishing device is put into an underground working cylinder; the salvage head is moved out of the tool cylinder through the salvage driving device, and after the salvage head captures an old gas lift valve in the underground working cylinder, the salvage head is moved into the tool cylinder through the salvage driving device, so that the salvage operation of the gas lift valve is completed; the throwing head is moved out of the tool cylinder through the throwing driving device, and after the throwing head throws the new gas lift valve to a preset position in the underground working cylinder, the throwing head is moved into the tool cylinder through the throwing driving device, so that the gas lift valve throwing operation is completed; and lifting the underground gas lift valve throwing and fishing device to the ground.

The underground gas lift valve throwing and fishing device and the throwing and fishing method have the characteristics and advantages that:

1. according to the invention, by arranging the salvaging driving device and the throwing driving device, the salvaging operation of the underground gas lift valve and the throwing operation of the throwing gas lift valve can be completed once by putting the underground gas lift valve throwing device into the shaft, and the device does not need to be lifted out of the shaft between the salvaging operation of the gas lift valve and the throwing operation of the gas lift valve, so that the operation efficiency of replacing the gas lift valve is effectively improved;

2. the salvaging driving device and the throwing driving device are both provided with the push-pull mechanism, the salvaging head and the throwing head are pushed out of the tool cylinder or pulled back into the tool cylinder through the push-pull mechanism, so that salvaging and throwing of the gas lift valve are realized, and the push-pull mechanism has a simple structure and works stably and reliably;

3. the fishing driving device and the throwing driving device are respectively provided with the clamping assembly, the working states of the clamping assembly are respectively an activated state, a non-activated state and a failure state, and the fishing working state and the throwing working state of the underground gas lift valve throwing and fishing device are not influenced by each other and are not interfered with each other by switching the working states of the clamping assembly, so that the smooth proceeding of the gas lift valve fishing operation and the gas lift valve throwing operation is ensured.

Drawings

The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:

FIG. 1 is a schematic illustration of an initial state of the downhole gas lift valve bailing device of the present invention;

FIG. 2 is a schematic view of a latch assembly of the fishing driving device of FIG. 1;

FIG. 3 is a schematic view of the latch assembly of the fishing and launch drivers of FIG. 1;

FIG. 4 is a schematic illustration of the downhole gas lift valve bailing device of the present invention in a bailing operation;

FIG. 5 is a schematic view of the latch assembly of the fishing drive of FIG. 4;

FIG. 6 is a schematic illustration of the engagement of the latch assembly of the release trigger and the launch drive of FIGS. 1 and 2;

FIG. 7 is a schematic illustration of the downhole gas lift valve bailing device of the present invention in a bailing operation;

FIG. 8 is a schematic view of the latch assembly of the fishing driver of FIG. 7;

FIG. 9 is a schematic view of the latch assembly of the fishing drive of FIG. 7;

fig. 10 is a schematic view of the engagement of the latch assembly of the release trigger and the delivery drive of fig. 7.

Reference numerals for main elements:

1. a tool cylinder; 11. a salvaging window; 12. a launch window; 13. a plug hole; 14. an opening;

2. Fishing a driving device;

21. a push-pull mechanism;

211. a locking assembly; 2111. a mounting base; 2112. a plug pin; 2113. a mounting hole; 2114. a tension spring;

2115. a pull rod; 21151. a fulcrum; 21152. a first section; 21153. a second section;

212. a swinging mechanism; 2121. swing arms; 2122. a support arm; 2123. a first rotating shaft; 2124. a second rotating shaft;

2125. a third rotating shaft; 2126. a fourth rotating shaft;

22. a clamping assembly;

221. a base; 222. a movable assembly; 2221. a movable block; 2222. a clamping block; 2223. a locking member;

223. a compression spring; 224. a plug pin; 225. a knock pin;

23. unlocking the switch; 24. fixing the hanging piece; 25. a tension spring; 26. a pulley; 27. a pulley rope;

28. a floating wheel frame; 29. releasing the switch;

3. a throwing driving device; 4. a fishing head; 5. a delivery head;

6. unlocking the triggering device;

61. a connecting rod seat; 62. a link mechanism; 621. a first link; 622. a second link;

63. unlocking plate; 64. a slide bar; 65. and (3) a spring.

Detailed Description

For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings. Wherein the use of the adjective or adverb modifiers "upper" and "lower", "left" and "right", "top" and "bottom", "inner" and "outer" are merely for ease of reference relative among groups of terms, and do not describe any particular directional limitation on the modified term. In addition, the terms "first," "second," etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," etc. may explicitly or implicitly include one or more such features. Unless defined otherwise, all directions, such as up, down, left, right, etc., referred to herein are in reference to the up, down, right, left, etc., directions of fig. 1 of the present invention, and are described herein.

Embodiment one

As shown in fig. 1, 4 and 7, the invention provides a downhole gas lift valve throwing and fishing device, which comprises a tool cylinder 1, a fishing driving device 2 arranged in the tool cylinder 1 and a throwing driving device 3 arranged in the tool cylinder 1, wherein a fishing window 11 and a throwing window 12 are arranged on the side wall of the tool cylinder 1; the salvage driving device 2 can be connected with a salvage head 4 for salvaging the gas lift valve, and the salvage driving device 2 can drive the salvage head 4 to move out of and move into the tool cylinder 1 through the salvage window 11 so as to finish the operation of salvaging the gas lift valve; the throwing driving device 3 can be connected with a throwing head 5 for throwing the gas lift valve, and the throwing driving device 3 can drive the throwing head 5 to move out of and into the tool cylinder 1 through the throwing window 12 so as to finish the operation of throwing the gas lift valve.

The underground gas lift valve throwing and fishing device can finish two operations of the gas lift valve salvaging and throwing the gas lift valve only by one time of entering the shaft, and the device does not need to be lifted out of the shaft between the operation of the gas lift valve salvaging and the operation of the gas lift valve throwing, so that the operation efficiency of replacing the gas lift valve is effectively improved.

In the following description of the specific embodiments of the fishing driving device 2 and the throwing driving device 3, for the sake of brevity of description, the components of the fishing driving device 2 and the throwing driving device 3 which have the same structure and the same working principle will be described in a unified manner, and unless necessary, they are not distinguished by names and reference numerals.

As shown in fig. 1, 4 and 7, in an embodiment of the present invention, the fishing driving device 2 and the throwing driving device 3 each include a push-pull mechanism 21, the push-pull mechanism 21 of the fishing driving device 2 is connected with the fishing head 4, the push-pull mechanism 21 of the fishing driving device 2 can push the fishing head 4 out of the tool barrel 1 and pull the fishing head back into the tool barrel 1 through the fishing window 11 (as shown in fig. 4), the push-pull mechanism 21 of the throwing driving device 3 is connected with the throwing head 5, and the push-pull mechanism 21 of the throwing driving device 3 can push the throwing head 5 out of the tool barrel 1 and pull the throwing head back into the tool barrel 1 through the throwing window 12 (as shown in fig. 7). The push-pull mechanism of the fishing driving device 2 and the push-pull mechanism of the throwing driving device 3 have the same structure and working principle, so that the push-pull mechanism of the fishing driving device 2 and the push-pull mechanism of the throwing driving device 3 are not distinguished when the push-pull mechanism 21 is described below.

The push-pull mechanism 21 of the present embodiment may be an electric drive mechanism or a mechanical drive mechanism.

As shown in fig. 1, 4 and 7, in an embodiment of the present invention, the push-pull mechanism 21 is movably disposed in the tool barrel 1, the push-pull mechanism 21 has an initial position and a locking position relative to the tool barrel 1, the push-pull mechanism 21 can move between the initial position and the locking position relative to the tool barrel 1, the push-pull mechanism 21 of the fishing driving device 2 and the push-pull mechanism 21 of the throwing driving device are both located in the initial position in fig. 1, the push-pull mechanism 21 of the fishing driving device 2 is located in the locking position in fig. 4, and the push-pull mechanism 21 of the throwing driving device 3 is located in the locking position in fig. 7; when the push-pull mechanism 21 is positioned at the initial position, the fishing head 4 or the throwing head 5 connected with the push-pull mechanism 21 is positioned in the tool barrel 1 (as shown in fig. 1); when the push-pull mechanism 21 moves from the initial position to the locking position, the push-pull mechanism 21 pushes the fishing head 4 or the throwing head 5 connected with the push-pull mechanism out of the tool barrel 1, and the push-pull mechanism 21 is in locking connection with the tool barrel 1 (as shown in fig. 4 and 7), namely, the push-pull mechanism 21 and the tool barrel 1 are relatively fixed; in the state that the push-pull mechanism 21 is located at the locking position, the push-pull mechanism 21 and the salvaging head 4 or the throwing head 5 connected with the push-pull mechanism 21 are driven to move by moving the tool cylinder 1 so as to salvage or throw the gas lift valve, for example, the tool cylinder 1 is moved downwards, the salvaging head 4 is spliced with the underground old gas lift valve to complete the operation of the salvaging gas lift valve, or a new gas lift valve connected with the throwing head 5 is inserted into a preset installation position to complete the operation of throwing the gas lift valve; when the push-pull mechanism 21 is moved from the locked position towards the initial position, the push-pull mechanism 21 pulls the fishing head 4 or the dispensing head 5 connected thereto back into the tool barrel 1 (as shown in fig. 7).

As shown in fig. 1, 4 and 7, in a specific embodiment, the installation position of the gas lift valve in the underground is located in the underground working cylinder, the locking position of the push-pull mechanism 21 is located below the initial position, the salvage driving device 2 and the throwing driving device 3 also comprise a clamping assembly 22 arranged above the push-pull mechanism 21, the clamping assembly 22 can be axially and slidably arranged in the tool cylinder 1, and a clamping structure which can be clamped with the clamping assembly 22 is arranged in the underground working cylinder; when the push-pull mechanism 21 is at the initial position, the push-pull mechanism 21 props against the clamping assembly 22 (as shown in fig. 1), namely the clamping assembly 22 and the push-pull mechanism 21 are propped up and down, at the moment, the clamping assembly 22 and the clamping structure are clamped and the tool cylinder 1 is lifted, and because the clamping assembly 22 cannot move upwards under the limiting action of the clamping structure, the push-pull mechanism 21 cannot move upwards under the limiting action of the clamping assembly 22, when the tool cylinder 1 is lifted, the tool cylinder 1 moves upwards relative to the push-pull mechanism 21, namely the push-pull mechanism 21 moves downwards relative to the tool cylinder 1 until the push-pull mechanism 21 moves to the locking position; when the push-pull mechanism 21 is in the locked position, the push-pull mechanism 21 is separated from the clamping assembly 22 because the push-pull mechanism 21 also moves downward with the tool cylinder 1 by lowering the tool cylinder 1 to salvage or release the gas lift valve. The structure and the working principle of the clamping assembly of the fishing driving device 2 and the clamping assembly of the throwing driving device 3 are the same, so that the clamping assembly of the fishing driving device 2 and the clamping assembly of the throwing driving device 3 are not distinguished when the clamping assembly 22 is described below.

In the embodiment, the clamping assembly 22 is arranged, and the push-pull mechanism 21 can move from the initial position to the locking position relative to the tool barrel 1 by virtue of the clamping structure in the underground working barrel, so that the operation of salvaging the gas lift valve or throwing the gas lift valve is conveniently performed under the state that the push-pull mechanism 21 is in the locking position.

As shown in fig. 1, 4 and 7, in a specific embodiment, an unlock switch 23 capable of releasing the lock between the push-pull mechanism 21 and the tool cylinder 1 is provided between the push-pull mechanism 21 and the clamping assembly 22, the unlock switch 23 is mounted on the clamping assembly 22, and in a state that the clamping assembly 22 is clamped with the clamping structure and the push-pull mechanism 21 is located at the locking position, the tool cylinder 1 is lifted up to drive the push-pull mechanism 21 to move towards the clamping assembly 22, and when the push-pull mechanism 21 moves to the unlock switch 23, the unlock switch 23 releases the lock between the push-pull mechanism 21 and the tool cylinder 1, so that the push-pull mechanism 21 can move from the locking position towards the initial position relative to the tool cylinder 1.

In the present embodiment, the unlocking switch 23 is provided to release the lock between the push-pull mechanism 21 and the tool pot 1, so that the push-pull mechanism 21 can be moved from the locked position to the initial position with respect to the tool pot 1, and the push-pull mechanism 21 can pull the fishing head 4 or the throwing head 5 connected thereto back into the tool pot 1.

As shown in fig. 1, 4 and 7, in a specific embodiment, the fishing driving device 2 and the throwing driving device 3 further include a fixing hanger 24 and an extension spring 25, which are disposed in the tool barrel 1, wherein the structure and the working principle of the fixing hanger of the fishing driving device 2 and the fixing hanger of the throwing driving device 3 are the same, so when the fixing hanger 24 is described below, the fixing hanger of the fishing driving device 2 and the fixing hanger of the throwing driving device 3 are not distinguished, and the description of the extension spring 25 is also the same; the fixed pendant 24 is arranged above the clamping assembly 22, the fixed pendant 24 is fixedly connected with the tool cylinder 1, the extension spring 25 is suspended below the fixed pendant 24, the push-pull mechanism 21 is connected with the extension spring 25, the extension spring 25 is always in a stretched state, after the unlocking switch 23 releases the locking between the push-pull mechanism 21 and the tool cylinder 1, under the upward tensile force in the direction of the extension spring 25, the push-pull mechanism 21 moves upwards from the locking position to the initial position relative to the tool cylinder 1.

In this embodiment, the tension spring 25 is provided to apply an upward tension to the push-pull mechanism 21, so that the push-pull mechanism 21 can be automatically reset.

As shown in fig. 1, 4 and 7, the fishing driving device 2 and the throwing driving device 3 further comprise a pulley 26 arranged in the tool cylinder 1 and a pulley rope 27 bypassing the pulley 26, the pulley 26 is suspended below the tension spring 25, one end of the pulley rope 27 is connected with the push-pull mechanism 21, the other end of the pulley rope 27 is connected with the clamping assembly 22, and the push-pull mechanism 21 and the clamping assembly 22 are connected in a relatively movable manner and the push-pull mechanism 21 and the tool cylinder 1 and the clamping assembly 22 and the tool cylinder 1 are connected in a relatively movable manner by arranging the tension spring 25, the pulley 26 and the pulley rope 27.

Specifically, a floating wheel frame 28 capable of floating up and down is suspended below the tension spring 25, and the pulley 26 is fixed below the floating wheel frame 28.

As shown in fig. 1, 4 and 7, in one embodiment of the present invention, the push-pull mechanism 21 includes a locking assembly 211 capable of moving along the axial direction of the tool barrel 1 and a swing mechanism 212 connected to the locking assembly 211, the swing mechanism 212 being connected to the fishing head 4 or the throwing head 5; when the push-pull mechanism 21 is in the initial position, the swing mechanism 212 is located in the tool barrel 1; when the push-pull mechanism 21 moves from the initial position toward the locking position, the locking assembly 211 moves axially in a first direction relative to the tool barrel 1, and the swing mechanism 212 swings toward the outside of the tool barrel 1 to push the fishing head 4 or the putting head 5 out of the tool barrel 1; when the push-pull mechanism 21 is in the locked position, the locking assembly 211 is in locking connection with the tool cartridge 1; when the push-pull mechanism 21 is moved from the lock position toward the initial position, the lock assembly 211 is axially moved in a second direction opposite to the first direction with respect to the tool cylinder 1, and the swing mechanism 212 swings toward the inside of the tool cylinder 1.

The push-pull mechanism 21 of the present embodiment has a lock assembly 211 and a swing mechanism 212 to achieve a locked connection with the tool pot 1 through the lock assembly 211, and to achieve push-pull of the fishing head 4 or the putting head 5 through the swing mechanism 212.

As shown in fig. 1, 4 and 7, in one embodiment, the swing mechanism 212 is connected below the locking assembly 211, the first direction is along the downward direction, the second direction is along the upward direction, when the push-pull mechanism 21 is at the initial position, the locking assembly 211 is against the clamping assembly 22, and the swing mechanism 212 is located in the tool barrel 1; when the push-pull mechanism 21 moves from the initial position toward the locking position, the locking assembly 211 moves axially downward relative to the tool barrel 1, and the swing mechanism 212 swings toward the outside of the tool barrel 1 to push the fishing head 4 or the putting head 5 out of the tool barrel 1; when the push-pull mechanism 21 is in the locked position, the locking assembly 211 is in locking connection with the tool cartridge 1; when the push-pull mechanism 21 is moved from the locked position towards the initial position, the locking assembly 211 moves axially upwards relative to the tool barrel 1 and the swing mechanism 212 swings towards the interior of the tool barrel 1 to pull the fishing head 4 or the running head 5 back into the tool barrel 1.

As shown in fig. 1, 4 and 7, in a specific embodiment, the swing mechanism 212 includes a swing arm 2121 and a support arm 2122, the swing arm 2121 is swingably connected below the locking assembly 211, the upper end of the swing arm 2121 is rotatably connected to the locking assembly 211, the lower end of the swing arm 2121 is rotatably connected to the fishing head 4 or the throwing head 5, one end of the support arm 2122 is rotatably connected to a portion between two ends of the swing arm 2121, and the other end of the support arm 2122 is rotatably connected to an inner side wall of the tool barrel 1; when the push-pull mechanism 21 is at the initial position, the swing arm 2121 is positioned inside the tool cylinder 1 and is parallel to the axial direction of the tool cylinder 1, i.e. the swing arm 2121 is suspended below the locking assembly 211 in a vertical state, and the support arm 2122 is inclined relative to the axial direction of the tool cylinder 1; when the locking assembly 211 moves axially downward relative to the tool pot 1, the arm 2122 pushes the swing arm 2121 toward the outside of the tool pot 1, causing the swing arm 2121 to swing toward the outside of the tool pot 1; when the locking assembly 211 is in locking connection with the tool barrel 1, the swing arm 2121 swings to the outside of the tool barrel 1 and is supported and positioned by the support arm 2122, for example, the support arm 2122 is in a horizontal state at this time, and the lower end of the swing arm 2121 extends out of the tool barrel 1; when the locking assembly 211 is moved axially upwardly relative to the tool barrel 1, the swing arm 2121 and the arm 2122 swing back toward the interior of the tool barrel 1 to pull the fishing head 4 or the running head 5 back into the tool barrel 1.

As shown in fig. 1, 4 and 7, preferably, two swing arms 2121 are provided, the two swing arms 2121 are arranged side by side and in parallel, the support arm 2122 is rotatably connected with one of the swing arms 2121, the upper ends of the two swing arms 2121 are respectively provided with a first rotating shaft 2123 so as to be rotatably connected with the locking assembly 211 through the first rotating shaft 2123, the lower ends of the two swing arms 2121 are respectively provided with a second rotating shaft 2124 so as to be rotatably connected with the fishing head 4 or the throwing head 5 through the second rotating shaft 2124, the support arm 2122 is rotatably connected with one of the swing arms 2121 through a third rotating shaft 2125, the support arm 2122 is rotatably connected with the inner wall of the tool barrel 1 through a fourth rotating shaft 2126, and the two first rotating shafts 2123, the two second rotating shafts 2124, the third rotating shaft 2125 and the fourth rotating shaft 2126 are mutually parallel. The two swing arms 2121 have the advantage that when the two swing arms 2121 push the fishing head 4 or the throwing head 5 to the outside of the tool cylinder 1, the fishing head 4 and the throwing head 5 cannot shake relative to the swing arms 2121, but are kept approximately parallel to the axial direction of the tool cylinder 1, so that the gas lift valve can be conveniently fished and thrown.

As shown in fig. 3 and 5, in a specific embodiment, the locking assembly 211 includes a mounting seat 2111 and a plug pin 2112, a mounting hole 2113 disposed along a radial direction of the tool barrel 1 is provided in the mounting seat 2111, the plug pin 2112 is radially movably disposed in the mounting hole 2113, a plug hole 13 is provided on a sidewall of the tool barrel 1, a tension spring 2114 for applying a radial tension to the plug pin 2112 toward the plug hole 13 is further provided in the mounting seat 2111, when the push-pull mechanism 21 is in an initial position, the plug hole 13 is located below the mounting hole 2113 (as shown in fig. 1), and when the push-pull mechanism 21 moves to a locking position relative to the tool barrel 1, the mounting hole 2113 and the plug hole 13 are aligned and communicate, and the plug pin 2112 is inserted into the plug hole 13 under the radial tension applied by the tension spring 2114, so as to lock the locking assembly 211 and the tool barrel 1 (as shown in fig. 4 and 5).

As shown in fig. 5 and 9, the locking assembly 211 further includes a pull rod 2115 disposed in the mounting seat 2111, the pull rod 2115 is rotatably connected to the mounting seat 2111, the rotational connection between the pull rod 2115 and the mounting seat 2111 is a fulcrum 21151 of the pull rod 2115, the pull rod 2115 can rotate about the fulcrum 21151, the lower end of the pull rod 2115 is rotatably connected to the plug pin 2112, one end of the tension spring 2114 is connected to the lower end of the pull rod 2115, the other end of the tension spring 2114 is connected to the mounting seat 2111, the upper end of the pull rod 2115 abuts against an inner side wall of the tool barrel 1 opposite to the plug hole 13 under the tension of the tension spring 2114, the unlocking switch 23 drives the pull rod 2115 to rotate about the fulcrum 21151 by inserting the upper end of the pull rod 2115 into the inner side wall of the tool barrel 1, and the pull rod 2112 is pulled out of the plug hole 13 by rotating the plug pin 2112 to release the locking between the push-pull mechanism 21 and the tool barrel 1 (as shown in fig. 7 and 9).

As shown in fig. 3, 5 and 9, in particular, the pull rod 2115 is a curved rod, the pull rod 2115 includes a first section 21152 located above the fulcrum 21151 and a second section 21153 located below the fulcrum 21151, an obtuse angle is formed between the first section 21152 and the second section 21153, the first section 21152 is inclined to the left and upper sides relative to the second section 21153, the peg 2112 and the tension spring 2114 are located on the right side of the second section 21153 and are hinged to the second section 21153, respectively, such as the tension spring 2114 is disposed radially of the barrel 1, the peg 13 is disposed on the right side wall of the barrel 1, the first section 21152 of the pull rod 2115 abuts against the left side inner wall of the barrel 1 under the tension of the tension spring 2114, when the unlock switch 23 is inserted between the first section 21152 of the pull rod 2115 and the inner wall of the barrel 1, the first section 21152 of the pull rod 2115 rotates to the right about the fulcrum 21151 under the push of the unlock switch 23, and the second section 21153 of the pull rod 2115 rotates about the fulcrum 21151 to the left and the second section 21153 of the pull rod 2115 rotates toward the left as shown in fig. 2, such that the second section 21153 of the pull rod 2115 rotates toward the left side 2119 under the pull force of the pull rod 2119.

As shown in fig. 3, 5 and 9, in a specific embodiment, the unlocking switch 23 is an unlocking wedge, the unlocking switch 23 is rotatably connected with the clamping assembly 22, the unlocking wedge has a closed position and an open position facing the pull rod 2115, for example, the closed position of the unlocking wedge is a horizontal position, the open position of the unlocking wedge is a vertical position, and a first torsion spring (not shown) capable of driving the unlocking wedge to rotate from the closed position to the open position is provided between the unlocking wedge and the clamping assembly 22;

when the push-pull mechanism 21 is in the initial position, the push-pull mechanism 21 limits the unlocking wedge to the closed position (as shown in fig. 1, 3); when the push-pull mechanism 21 moves from the initial position to the locking position, the push-pull mechanism 21 is separated from the clamping assembly 22, and the unlocking wedge is driven by the first torsion spring to rotate to the opening position (as shown in fig. 4 and 5); in a state in which the push-pull mechanism 21 is located at the locking position and the clamping assembly 22 is clamped with the clamping structure, the tool cylinder 1 is lifted up to enable the tool cylinder 1 to drive the push-pull mechanism 21 to move towards the clamping assembly 22, when the unlocking wedge is inserted between the pull rod 2115 and the inner side wall of the tool cylinder 1, the pull rod 2115 rotates around the supporting point 21151 under the pushing of the unlocking wedge, and the inserting pin 2112 is pulled out of the inserting hole 13 (as shown in fig. 7 and 9). The unlocking wedge is adopted as the unlocking switch 23 in the embodiment, so that the structure is simple, and the operation is reliable.

Further, as shown in fig. 9, the lower end of the unlocking wedge has a pointed structure to facilitate insertion between the pull rod 2115 and the inner sidewall of the tool cartridge 1.

In one embodiment of the present invention, the locking assembly 22 has an activated state (as shown in fig. 2) extending out of the tool pot 1, a deactivated state (as shown in fig. 6) located in the tool pot 1, and a deactivated state (as shown in fig. 8) located in the tool pot 1, and when the locking assembly 22 is in the activated state, the locking assembly 22 is capable of locking with the locking structure;

the underground gas lift valve throwing and fishing device is provided with a fishing working state of the fishing gas lift valve and a throwing working state of the throwing gas lift valve, as shown in fig. 4, when the underground gas lift valve throwing and fishing device is in the fishing working state, the clamping assembly 22 of the throwing and fishing driving device 2 is in an activated state, the clamping assembly 22 of the throwing and fishing driving device 3 is in a non-activated state, the push-pull mechanism 21 of the throwing and fishing driving device 2 can push the fishing head 4 out of the tool cylinder 1 and back into the tool cylinder 1 through the fishing window 11 so as to finish the operation of the fishing gas lift valve, and the throwing and fishing driving device 3 does not work because the clamping assembly 22 of the throwing and fishing driving device 3 is in the non-activated state, so that the operation of the fishing gas lift valve is prevented from being interfered or blocked; as shown in fig. 7, when the underground gas lift valve throwing and fishing device is in a throwing working state, the clamping assembly 22 of the throwing and fishing driving device 3 is in an activated state, the clamping assembly 22 of the fishing driving device 2 is in a failure state, and the push-pull mechanism 21 of the throwing and fishing driving device 3 can push the throwing head 5 out of the tool cylinder 1 or pull the throwing head back into the tool cylinder 1 through the throwing window 12 so as to finish the operation of throwing the gas lift valve, and the clamping assembly 22 of the fishing driving device 2 is in a non-activated state, so that the fishing driving device 2 does not work, and interference or obstruction to the operation of throwing the gas lift valve is avoided.

In one embodiment, the side wall of the tool cylinder 1 is provided with an opening 14, the clamping assembly 22 comprises a base 221 and a movable component 222 capable of extending out of the tool cylinder 1 through the opening 14, the movable component 222 is rotatably connected with the base 221, the movable component 222 has an original position and a retracted position relative to the base 221, the retracted position is located on one side of the original position far away from the opening 14, and the movable component 222 can rotate relative to the tool cylinder 1 between the original position and the retracted position; as shown in fig. 2, when the latch assembly 22 is in the activated state, the movable component 222 is located at the original position, and the movable component 222 extends out of the tool barrel 1, as shown in fig. 1 and fig. 4, the latch assembly 22 of the fishing driving device 2; when the latch assembly 22 is in the inactive state, as shown in fig. 6, the movable component 222 is in the retracted position and the movable component 222 is located in the tool cartridge 1, as in the latch assembly 22 of the delivery driving device 3 in fig. 4.

As shown in fig. 6 and 10, a compression spring 223 is further disposed between a side of the movable component 222 facing away from the opening 14 and the base 221, the downhole gas lift valve throwing and fishing device further includes an unlocking trigger device 6 disposed in the tool barrel 1, the unlocking trigger device 6 can position the movable component 222 in a retracted position so as to keep the clamping assembly 22 in a non-activated state, and when the unlocking trigger device 6 releases the positioning of the movable component 222, the movable component 222 automatically rotates from the retracted position to an original position under the action of the elastic force of the compression spring 223, so that the clamping assembly 22 is switched to an activated state.

Specifically, the unlocking trigger device 6 is disposed between the fishing driving device 2 and the throwing driving device 3, and the unlocking trigger device 6 is used for activating the clamping assembly 22 of the throwing driving device 3.

The underground gas lift valve throwing and fishing device is in a fishing working state when the underground gas lift valve throwing and fishing device is put into a well, at the moment, the clamping assembly 22 of the fishing driving device 2 is in an activated state, the clamping assembly 22 of the throwing driving device 3 is kept in an inactivated state under the positioning action of the unlocking triggering device 6, and in the process that the underground gas lift valve throwing and fishing device moves towards the well, when the clamping assembly 22 of the fishing driving device 2 passes through a reducing structure in the well, such as an oil pipe coupling, the movable assembly 222 of the fishing driving device 2 moves towards the tool barrel 1 under the extrusion of the reducing structure and compresses the compression spring 223, at the moment, the clamping assembly 22 of the fishing driving device 2 is in an inactivated state temporarily, and after the clamping assembly passes through the reducing structure, the movable assembly 222 of the fishing driving device 2 automatically rotates to an original position under the elastic action of the compression spring 223, namely the clamping assembly 22 of the fishing driving device 2 is automatically switched to an activated state, so that the underground gas lift valve throwing and fishing device keeps the fishing working state; after the gas lift valve salvaging operation is completed, the unlocking trigger device 6 releases the positioning of the movable component 222 of the throwing driving device 3, and the movable component 222 of the throwing driving device 3 automatically rotates from the retracted position to the original position under the action of the elastic force of the compression spring 223, namely the clamping assembly 22 of the throwing driving device 3 is switched from the inactive state to the active state, so that the underground gas lift valve salvaging device is switched to the throwing working state; the latch assembly 22 of the fishing drive 2 has now been switched from an active state to a disabled state, a specific implementation of which will be described below.

As shown in fig. 2, 6 and 8, in a specific embodiment, the movable assembly 222 includes a movable block 2221 and a clamping block 2222 capable of extending out of the tool barrel 1 through the opening 14, the movable block 2221 is rotatably connected to the base 221, the clamping block 2222 is rotatably connected to the movable block 2221, the clamping block 2222 has an extended position and a retracted position with respect to the movable block 2221, the retracted position is located on a side of the extended position away from the opening 14, the clamping block 2222 is rotatable with respect to the movable block 2221 between the extended position and the retracted position, wherein the extended position corresponds to an initial position of the clamping block 2222, and the clamping block 2222 is located in the extended position with respect to the movable block 2221, regardless of whether the clamping assembly 22 is in an activated state or a deactivated state, such as the clamping assembly 22 of the fishing driving device 2 and the throwing driving device 3 in fig. 4; when the clamping assembly 22 is in an activated state, as in the clamping assembly 22 of the fishing driving device 2 in fig. 4, the clamping block 2222 is located at the extended position, and the clamping block 2222 extends out of the tool barrel 1; when the clamping assembly 22 is in the inactive state, as in the clamping assembly 22 of the delivery driving device 3 in fig. 1 and 4, the clamping block 2222 is located at the extended position, and the clamping block 2222 is located in the tool holder 1; when the latch assembly 22 is in a disabled state, such as the latch assembly 22 of the fishing driver 2 in fig. 7, the clamp block 2222 is in the retracted position and the clamp block 2222 is located within the tool pot 1, that is, the latch assembly 22 of the fishing driver 2 is switched from the activated state to the disabled state by rotating the clamp block 2222 from the extended position to the retracted position, wherein a specific implementation method of positioning the clamp block 2222 in the extended position and rotating the clamp block 2222 to the retracted position will be described below.

As shown in fig. 1, 4 and 7, in a specific embodiment, a locking member 2223 is disposed between the clamping block 2222 and the movable block 2221, and the locking member 2223 positions the clamping block 2222 in the extended position (as shown in fig. 2 and 6) by being connected to the clamping block 2222 and the movable block 2221.

As shown in fig. 3, 5 and 9, in a specific embodiment, a release switch 29 capable of releasing the connection between the lock 2222 and the movable block 2221 by the lock 2223 is provided between the push-pull mechanism 21 and the clamping assembly 22, the release switch 29 is mounted on the push-pull mechanism 21, when the push-pull mechanism 21 moves from the locking position to the initial position relative to the tool barrel 1, the release switch 29 moves along with the push-pull mechanism 21 toward the lock 2223, when the release switch 29 moves to the lock 2223 (as shown in fig. 9), the release switch 29 releases the connection between the lock 2223 and the movable block 2222 by the lock 2222, and the lock 2222 rotates to the retracted position, so that the clamping assembly 22 is switched to the disabled state (as shown in fig. 8).

Specifically, the locking piece 2223 is a locking pin, the locking pin is disposed in the block 2222, and the locking pin connects the block 2222 and the movable block 2221 by inserting into the movable block 2221; the clamping assembly 22 further comprises a plug 224 and a jack pin 225, the plug 224 is inserted into the base 221, the jack pin 225 is inserted into the movable block 2221, when the lock pin is inserted into the movable block 2221 and the movable block 2221 is at the original position, the lock pin, the jack pin 225 and the plug 224 are sequentially propped against from top to bottom, as in the clamping assembly 22 of the fishing driving device 2 in fig. 8, the release switch 29 sequentially moves upwards by pushing the plug 224, the jack pin 225 and the lock pin, the lock pin is ejected out of the movable block 2221, the lock pin is removed from the connection of the movable block 2221 and the clamping block 2222, and the connection of the lock 2223 to the clamping block 2222 and the movable block 2221 is released.

Further, the release switch 29 is a push rod, which is rotatably connected to the push-pull mechanism 21, and has a retracted position and an extended position toward the latch 224, and a second torsion spring (not shown) is provided between the push rod and the push-pull mechanism 21, which can drive the push rod to rotate from the retracted position toward the extended position; when the push-pull mechanism 21 is in the initial position, the clamping assembly 22 limits the ejector rod to the retracted position, namely, the ejector rod is clamped between the clamping assembly 22 and the push-pull mechanism 21 in a horizontal state; when the push-pull mechanism 21 moves from the initial position to the locking position, the push-pull mechanism 21 is separated from the clamping assembly 22, and the ejector rod automatically rotates from the retracted position to the open position under the drive of the second torsion spring so as to prepare for unlocking the locking piece 2223; when the push-pull mechanism 21 moves from the lock position toward the initial position with respect to the tool barrel 1, the jack rod pushes the latch 224, the jack pin 225, and the lock pin to sequentially move upward to eject the lock pin from the inside of the movable block 2221, thereby releasing the connection of the lock 2223 to the clamp block 2222 and the movable block 2221.

Further, a third torsion spring (not shown) capable of driving the clamping block 2222 to rotate from the extended position toward the retracted position is provided between the clamping block 2222 and the movable block 2221, and when the locking member 2223 removes the connection between the clamping block 2222 and the movable block 2221, that is, after the ejector rod ejects the locking pin from the movable block 2221, the clamping block 2222 automatically rotates from the extended position to the retracted position under the driving of the third torsion spring, thereby switching the clamping assembly 22 from the activated state to the deactivated state.

In an embodiment of the present invention, the unlocking trigger device 6 is disposed between the fishing driving device 2 and the throwing driving device 3, as shown in fig. 4 and 6, when the underground gas lift valve throwing and fishing device is in a fishing working state, the unlocking trigger device 6 locks the clamping assembly 22 of the throwing driving device 3 in an inactive state, after the fishing driving device 2 pulls the fishing head 4 and the gas lift valve fished by the fishing head 4 back into the tool barrel 1, the gas lift valve fished by the fishing head 4 triggers the unlocking trigger device 6, and the unlocking trigger device 6 releases the locking of the clamping assembly 22 of the throwing driving device 3, so that the clamping assembly 22 of the throwing driving device 3 is switched to an active state (as shown in fig. 7 and 10), and the underground gas lift valve throwing and fishing device is switched to the throwing working state.

As shown in fig. 4 and 7, in a specific embodiment, the fishing driving device 2, the unlocking trigger device 6 and the throwing driving device 3 are sequentially arranged from top to bottom, the unlocking trigger device 6 comprises a connecting rod seat 61, a connecting rod mechanism 62 and an unlocking plate 63, the connecting rod mechanism 62 is arranged corresponding to the fishing window 11, the connecting rod seat 61 is fixedly connected with the tool barrel 1, the lower end of the connecting rod mechanism 62 is rotationally connected with the connecting rod seat 61, the upper end of the connecting rod mechanism 62 is rotationally connected with the unlocking plate 63, the connecting rod mechanism 62 has a bending state and an extending state, before the gas lift valve salvaged by the salvaging head 4 enters the tool barrel 1, the connecting rod mechanism 62 is in the bending state (as shown in fig. 4 and 6), the unlocking plate 63 locks the clamping assembly 22 of the throwing driving device 3 in the non-activated state, when the gas lift valve salvaged by the salvaging head 4 enters the tool barrel 1, pushing force for pushing the connecting rod mechanism 62 to extend upwards to drive the connecting rod mechanism 62 and driving the unlocking plate 63 to move upwards, and when the connecting rod mechanism 62 is switched to the extending state (as shown in fig. 7 and 10), the unlocking plate 63 is in the bending state, the releasing the clamping assembly 22 of the throwing assembly 3 is separated from the clamping assembly 22 and the clamping assembly 22 is released from the driving device 22 to the locking assembly 3, and the clamping assembly is activated.

Specifically, the unlocking plate 63 is suspended under the upper end of the link mechanism 62 in a vertical state, the unlocking plate 63 is blocked between the clamping block 2222 of the clamping assembly 22 of the throwing driving device 3 and the opening 14 of the tool cylinder 1 to position the movable component 222 in the retracted position, and when the unlocking plate 63 moves upwards, the unlocking plate 63 withdraws from between the clamping block 2222 of the clamping assembly 22 of the throwing driving device 3 and the opening 14 of the tool cylinder 1, and the movable component 222 of the clamping assembly 22 of the throwing driving device 3 automatically rotates from the retracted position to the original position under the action of the elastic force of the compression spring 223, so that the clamping assembly 22 is switched to the activated state.

As shown in fig. 6 and 10, the link mechanism 62 further includes a first link 621 and a second link 622, wherein the lower end of the first link 621 is rotatably connected to the link seat 61, and the upper end of the first link 621 is rotatably connected to the lower end of the second link 622; a slide bar 64 is hung at the upper end of the second connecting rod 622, the upper end of the slide bar 64 is rotationally connected with the upper end of the second connecting rod 622, the lower end of the slide bar 64 is connected with the unlocking plate 63, the slide bar 64 and the unlocking plate 63 are both arranged along the axial direction of the tool barrel 1, when the connecting rod mechanism 62 is in a bending state, the first connecting rod 621 and the second connecting rod 622 enclose a triangle structure, and the connecting position of the first connecting rod 621 and the second connecting rod 622 is positioned at the salvaging window 11; when the link mechanism 62 is in the extended state, the first link 621 and the second link 622 are extended into a straight-bar structure.

Specifically, the slide rod 64 is suspended under the upper end of the link mechanism 62 in a vertical state, the unlocking plate 63 is suspended under the slide rod 64 in a vertical state, and when the gas lift valve salvaged by the salvage head 4 enters the tool cylinder 1 from the salvage window 11, the gas lift valve salvaged by the salvage head 4 pushes the connection part of the first link 621 and the second link 622 towards the inside of the tool cylinder 1 to drive the first link 621 and the second link 622 to open, so that the second link 622 drives the slide rod 64 and the unlocking plate 63 to move upwards.

As shown in fig. 6 and 10, further, the slide bar 64 is connected to the inner side wall of the tool cylinder 1 by a spring 65 to prevent the slide bar 64 from moving upward until the gas lift valve is introduced into the tool cylinder 1. Specifically, the spring 65 is vertically stretched and connected between the slide bar 64 and the inner side wall of the tool cylinder 1, the lower end of the spring 65 is connected with the inner side wall of the tool cylinder 1, the upper end of the spring 65 is connected with the slide bar 64, and the slide bar 64 receives downward tension applied by the spring 65, so that the slide bar 64 cannot move upwards at will, and the locking of the unlocking plate 63 to the clamping assembly 22 of the delivery driving device 3 is ensured to be stable and reliable.

In an embodiment of the present invention, the installation position of the gas lift valve in the well is a valve cylinder fixed in the downhole working cylinder, a guiding sleeve is further arranged in the downhole working cylinder, the guiding sleeve is located above the valve cylinder, the clamping structure is a guiding groove arranged on the guiding sleeve, the guiding groove is provided with a limiting top wall, and when the clamping assembly 22 is inserted into the guiding groove and props against the limiting top wall, the guiding groove is clamped with the clamping assembly 22 and limits the clamping assembly 22 to move upwards.

Specifically, the notch of the guide slot faces downwards, the notch of the guide slot is provided with a guide inclined plane, the clamping assembly 22 slides into the guide slot along the guide inclined plane through the lifting tool cylinder 1, the underground gas lift valve throwing and fishing device rotates relative to the underground working cylinder when the clamping assembly 22 slides along the guide inclined plane, and when the clamping assembly 22 moves to be clamped with the guide slot, the fishing head 4 of the fishing driving device 2 and the throwing head 5 of the throwing driving device 3 rotate to be aligned with the valve cylinder so as to facilitate fishing and throwing the gas lift valve.

In an embodiment of the invention, the downhole gas lift valve throwing and fishing device comprises a fishing head 4 and a throwing head 5, wherein the structures of the fishing head 4 and the throwing head 5 can be the same or different. Since the fishing head 4 and the throwing head 5 are both in the prior art, the specific structure and the working principle thereof are not described.

Second embodiment

The invention also provides an underground gas lift valve throwing and fishing method, which adopts an underground gas lift valve throwing and fishing device to finish gas lift valve throwing and fishing operation and gas lift valve throwing and fishing operation, and the underground gas lift valve throwing and fishing device of the embodiment has the same structure, working principle and beneficial effect as those of the first embodiment and is not repeated here; the method for throwing and fishing the underground gas lift valve comprises the following steps:

Step S1: loading a fishing head 4 into the tool cylinder 1, connecting the fishing head 4 with the fishing driving device 2, loading a throwing head 5 connected with a new gas lift valve into the tool cylinder 1, and connecting the throwing head 5 with the throwing driving device 3 (shown in figure 1);

step S2: the underground gas lift valve throwing and fishing device is put into an underground working cylinder;

step S3: the salvage head 4 is moved out of the tool cylinder 1 through the salvage driving device 2, after the salvage head 4 captures an old gas lift valve in the underground working cylinder, the salvage head 4 is moved into the tool cylinder 1 through the salvage driving device 2, and the gas lift valve salvage operation is completed (shown in fig. 4);

step S4: the throwing head 5 is moved out of the tool cylinder 1 through the throwing driving device 3, after the throwing head 5 throws the new gas lift valve into a preset position in the underground working cylinder, the throwing head 5 is moved into the tool cylinder 1 through the throwing driving device 3, and the gas lift valve throwing operation is completed (as shown in fig. 7);

step S5: lifting the underground gas lift valve throwing and fishing device to the ground.

According to the method for throwing and fishing the underground gas lift valve, the underground gas lift valve throwing and fishing device in the first embodiment is adopted, the underground gas lift valve throwing and fishing device is put into the shaft once, two operations of throwing and fishing the gas lift valve and throwing the gas lift valve can be completed, and the device does not need to be lifted out of the shaft between the operation of throwing and fishing the gas lift valve and the operation of throwing the gas lift valve, so that the operation efficiency of replacing the gas lift valve is effectively improved.

In one embodiment, the method for casting and fishing the underground gas lift valve comprises the following specific operation steps:

(1) As shown in fig. 1, the fishing head 4 is installed in the tool cylinder 1 of the underground gas lift valve throwing and fishing device, the fishing head 4 is connected with the swing arm 2121 of the fishing driving device 2, the throwing head 5 connected with the new gas lift valve is installed in the tool cylinder 1, the throwing head 5 is connected with the swing arm 2121 of the throwing driving device 3, at the moment, the clamping assembly 22 of the fishing driving device 2 is in an activated state (shown in fig. 2), and the clamping assembly 22 of the throwing driving device 3 is in a non-activated state (shown in fig. 6);

(2) Connecting the tool cylinder 1 with a steel wire, and lowering the underground gas lift valve throwing and fishing device into the underground working cylinder through the steel wire until the underground gas lift valve throwing and fishing device is lowered below the valve cylinder;

(3) Lifting the tool cylinder 1 until a clamping block 2222 of the clamping assembly 22 of the salvaging driving device 2 enters a guide groove of the guide sleeve and props against the limit top wall of the guide groove, and at the moment, the salvaging head 4 faces to an old gas lift valve in the valve cylinder;

(4) As shown in fig. 4, continuing to lift the tool cylinder 1, in the lifting process, the clamping assembly 22 and the locking assembly 211 of the fishing driving device 2 move downwards relative to the tool cylinder 1, meanwhile, the locking assembly 211 pushes the swinging mechanism 212 to swing towards the outer side of the tool cylinder 1, the swinging mechanism 212 pushes the fishing head 4 out of the tool cylinder 1 through the fishing window 11, when the locking assembly 211 is in locking connection with the tool cylinder 1, the tool cylinder 1 is stopped to lift, at the moment, the fishing head 4 is relatively fixed with the tool cylinder 1, and the fishing head 4 is aligned with an old gas lift valve in the valve cylinder;

(5) Lowering the tool cylinder 1, wherein the tool cylinder 1 drives the fishing head 4 to capture and lock the old gas lift valve;

(6) Lifting the tool cylinder 1, wherein the tool cylinder 1 drives the salvaging head 4 to move upwards, and the salvaging head 4 drags out the old gas lift valve from the valve cylinder;

(7) As shown in fig. 7, 8 and 9, in the lifting process, the push-pull mechanism 21 of the salvage driving device 2 moves upwards along with the tool barrel 1, when the unlocking wedge is inserted between the pull rod 2115 and the inner side wall of the tool barrel 1, the pull rod 2115 pulls the plug pin 2112 out of the plug hole 13 of the tool barrel 1, so that the locking assembly 211 moves upwards relative to the tool barrel 1 under the action of the tension spring 25, meanwhile, the locking assembly 211 pulls the swinging mechanism 212 upwards, so that the swinging mechanism 212 swings towards the interior of the tool barrel 1, the swinging mechanism 212 drives the salvage head 4 and the old gas lift valve to enter the tool barrel 1 through the salvage window 11, the old gas lift valve triggers the unlocking triggering device 6 after entering the tool barrel 1, so that the unlocking triggering device 6 releases the locking of the locking assembly 22 of the throwing driving device 3, and the locking assembly 22 of the throwing driving device 3 is switched from the inactive state to the active state; meanwhile, the ejector rod of the salvage driving device 2 pushes the bolt 224, the ejector pin 225 and the locking pin to sequentially move upwards, the locking pin is ejected out of the movable block 2221, the clamping assembly 22 of the salvage driving device 2 is switched from an activated state to a deactivated state, and at the moment, the underground gas lift valve throwing and fishing device finishes the salvage operation of the gas lift valve and is switched from a salvage working state to a throwing working state;

(8) Lifting the tool cylinder 1 until the clamping block 2222 of the clamping assembly 22 of the throwing driving device 3 enters the guide groove of the guide sleeve and props against the limit top wall of the guide groove, and the throwing head 5 faces the valve cylinder;

(9) As shown in fig. 7, continuing to lift the tool cylinder 1, in the lifting process, the clamping assembly 22 and the locking assembly 211 of the throwing driving device 3 move downwards relative to the tool cylinder 1, meanwhile, the locking assembly 211 pushes the swinging mechanism 212 to swing towards the outer side of the tool cylinder 1, the swinging mechanism 212 pushes the fishing head 4 out of the tool cylinder 1 through the fishing window 11, when the locking assembly 211 is in locking connection with the tool cylinder 1, the lifting of the tool cylinder 1 is stopped, at the moment, the throwing head 5 and the tool cylinder 1 are relatively fixed, and the throwing head 5 is aligned with the valve cylinder;

(10) Lowering the tool cylinder 1, and driving the throwing head 5 by the tool cylinder 1 to insert a new gas lift valve into the valve cylinder;

(11) Lifting the tool cylinder 1, and driving the delivery head 5 to move upwards and leave the valve cylinder by the tool cylinder 1;

(12) The tool cylinder 1 is continuously lifted, the action of the throwing driving device 3 in the process is basically the same as that of the salvaging driving device 2 in the step (7), and the difference is that the swinging mechanism 212 of the throwing driving device 3 pulls the throwing head 5 into the tool cylinder 1, and finally the clamping assembly 22 of the throwing driving device 3 is switched from an activated state to a deactivated state, and at the moment, the underground gas lift valve salvaging device finishes the throwing operation of the gas lift valve;

(13) The underground gas lift valve throwing and fishing device is lifted to the ground through the steel wire.

The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention. It should be noted that, the components of the present invention are not limited to the above-mentioned overall application, and each technical feature described in the specification of the present invention may be selected to be used singly or in combination according to actual needs, so that other combinations and specific applications related to the present invention are naturally covered by the present invention.

Claims

1. The underground gas lift valve throwing and fishing device is characterized by comprising a tool cylinder, a fishing driving device arranged in the tool cylinder and a throwing driving device arranged in the tool cylinder, wherein a fishing window and a throwing window are arranged on the side wall of the tool cylinder;

the salvage driving device can be connected with a salvage head for salvaging the gas lift valve, and can drive the salvage head to move out of and into the tool cylinder through the salvage window;

The throwing driving device can be connected with a throwing head for throwing the gas lift valve, and can drive the throwing head to move out of and move into the tool cylinder through the throwing window;

the fishing driving device and the throwing driving device both comprise a push-pull mechanism, the push-pull mechanism of the fishing driving device is connected with the fishing head and can push the fishing head out of the tool cylinder and pull the fishing head back into the tool cylinder through the fishing window, and the push-pull mechanism of the throwing driving device is connected with the throwing head and can push the throwing head out of the tool cylinder and pull the throwing head back into the tool cylinder through the throwing window;

the push-pull mechanism is movably arranged in the tool cylinder and has an initial position and a locking position relative to the tool cylinder; when the push-pull mechanism is positioned at the initial position, a fishing head or a throwing head connected with the push-pull mechanism is positioned in the tool cylinder; when the push-pull mechanism moves from the initial position to the locking position, the push-pull mechanism pushes the fishing head or the throwing head connected with the push-pull mechanism out of the tool cylinder, and the push-pull mechanism is in locking connection with the tool cylinder; under the state that the push-pull mechanism is positioned at the locking position, the tool cylinder is moved to drive the push-pull mechanism and a salvaging head or a throwing head connected with the push-pull mechanism to move so as to salvage or throw the gas lift valve; when the push-pull mechanism moves from the locking position to the initial position, the push-pull mechanism pulls the fishing head or the throwing head connected with the push-pull mechanism back into the tool cylinder;

The push-pull mechanism comprises a locking assembly capable of moving along the axial direction of the tool cylinder and a swinging mechanism connected with the locking assembly, and the swinging mechanism is connected with the fishing head or the throwing head;

when the push-pull mechanism is at an initial position, the swing mechanism is positioned in the tool cylinder; when the push-pull mechanism moves from an initial position to a locking position, the locking assembly axially moves relative to the tool cylinder along a first direction, and the swinging mechanism swings towards the outer side of the tool cylinder so as to push the fishing head or the throwing head out of the tool cylinder; when the push-pull mechanism is in a locking position, the locking assembly is in locking connection with the tool cylinder; when the push-pull mechanism moves from a locked position toward an initial position, the locking assembly moves axially relative to the tool cartridge in a second direction opposite the first direction, and the swing mechanism swings toward the interior of the tool cartridge.

2. The downhole gas lift valve casting and fishing device according to claim 1, wherein the downhole installation position of the gas lift valve is located in a downhole working cylinder, the locking position is located below the initial position, the casting and driving device and the casting and driving device further comprise clamping assemblies arranged above the push-pull mechanism, the clamping assemblies can be axially and slidably arranged in the tool cylinder, and a clamping structure which can be clamped with the clamping assemblies is arranged in the downhole working cylinder; when the push-pull mechanism is positioned at the initial position, the push-pull mechanism pushes against the clamping assembly, and the tool cylinder is lifted up by clamping the clamping assembly with the clamping structure, so that the push-pull mechanism moves from the initial position to the locking position relative to the tool cylinder.

3. The downhole gas lift valve casting and fishing device according to claim 2, wherein an unlocking switch capable of unlocking the lock between the push-pull mechanism and the tool cylinder is arranged between the push-pull mechanism and the clamping assembly, the unlocking switch is arranged on the clamping assembly, the push-pull mechanism is driven to move towards the clamping assembly by lifting the tool cylinder under the state that the clamping assembly is clamped with the clamping structure and the push-pull mechanism is located at the locking position, and when the push-pull mechanism moves to the unlocking switch, the unlocking switch unlocks the lock between the push-pull mechanism and the tool cylinder, so that the push-pull mechanism can move from the locking position towards the initial position relative to the tool cylinder.

4. The downhole gas lift valve casting and fishing device of claim 3, wherein the fishing driving device and the casting driving device further comprise a fixed hanging piece and a tension spring which are arranged in the tool cylinder, the fixed hanging piece is arranged above the clamping assembly, the fixed hanging piece is fixedly connected with the tool cylinder, the tension spring is suspended below the fixed hanging piece, the push-pull mechanism is connected with the tension spring, and after the unlocking switch releases the locking between the push-pull mechanism and the tool cylinder, the push-pull mechanism moves from the locking position to the initial position relative to the tool cylinder under the action of the tension spring.

5. The downhole gas lift valve casting and fishing device of claim 4, wherein the casting and fishing drive device and the casting and fishing drive device further comprise pulleys arranged in the tool cylinder and pulley ropes bypassing the pulleys, the pulleys are suspended below the tension springs, one ends of the pulley ropes are connected with the push-pull mechanism, and the other ends of the pulley ropes are connected with the clamping assembly.

6. The downhole gas lift valve casting and fishing device of claim 2, wherein the casting and fishing driving device and the casting and fishing driving device further comprise a fixed hanging piece, a tension spring, a pulley and a pulley rope which bypasses the pulley, wherein the fixed hanging piece is arranged above the clamping assembly, the fixed hanging piece is fixedly connected with the tool cylinder, the tension spring is hung below the fixed hanging piece, the pulley is hung below the tension spring, one end of the pulley rope is connected with the push-pull mechanism, and the other end of the pulley rope is connected with the clamping assembly.

7. A downhole gas lift valve bailing device according to claim 3, wherein the push-pull mechanism comprises a locking assembly movable in an axial direction of the tool barrel and a swing mechanism connected below the locking assembly, the swing mechanism being connected to the bailing head or the bailing head;

When the push-pull mechanism is in an initial position, the locking assembly props against the clamping assembly, and the swinging mechanism is positioned in the tool cylinder; when the push-pull mechanism moves from an initial position to a locking position, the locking assembly moves axially downwards relative to the tool cylinder, and the swinging mechanism swings towards the outer side of the tool cylinder so as to push the salvaging head or the throwing head out of the tool cylinder; when the push-pull mechanism is in a locking position, the locking assembly is in locking connection with the tool cylinder; when the push-pull mechanism moves from a locked position toward an initial position, the locking assembly moves axially upward relative to the tool cartridge, and the swing mechanism swings toward the interior of the tool cartridge.

8. The downhole gas lift valve casting and fishing device according to claim 1 or 7, wherein the swing mechanism comprises a swing arm and a support arm, the swing arm is swingably connected below the locking assembly, the upper end of the swing arm is rotatably connected with the locking assembly, the lower end of the swing arm is rotatably connected with the fishing head or the casting head, one end of the support arm is rotatably connected with a part between two ends of the swing arm, and the other end of the support arm is rotatably connected with the inner side wall of the tool barrel;

When the push-pull mechanism is in an initial position, the swing arm is positioned in the tool cylinder and is parallel to the axial direction of the tool cylinder, and the support arm is inclined relative to the axial direction of the tool cylinder; when the locking assembly moves axially downwards relative to the tool cylinder, the support arm pushes the swing arm towards the outer side of the tool cylinder, so that the swing arm swings towards the outer side of the tool cylinder; when the locking assembly is in locking connection with the tool cylinder, the swing arm swings to the outside of the tool cylinder and is supported and positioned by the support arm; the swing arm and the support arm swing toward the tool barrel interior as the locking assembly moves axially upward relative to the tool barrel.

9. The downhole gas lift valve casting and fishing device according to claim 8, wherein the number of the swing arms is two, the two swing arms are arranged side by side and in parallel, the support arm is rotationally connected with one of the swing arms, the upper ends of the two swing arms are respectively provided with a first rotating shaft so as to be rotationally connected with the locking assembly through the first rotating shaft, the lower ends of the two swing arms are respectively provided with a second rotating shaft so as to be rotationally connected with the fishing head or the throwing head through the second rotating shaft, the support arm is rotationally connected with one of the swing arms through a third rotating shaft, the support arm is rotationally connected with the inner wall of the tool cylinder through a fourth rotating shaft, and the two first rotating shafts, the two second rotating shafts, the third rotating shaft and the fourth rotating shaft are mutually parallel.

10. The downhole gas lift valve bailing device of claim 7, wherein the locking assembly comprises a mounting seat and a plug pin, wherein the mounting seat is internally provided with a mounting hole arranged along the radial direction of the tool barrel, the plug pin can be radially movably penetrated in the mounting hole, a plug hole is arranged on the side wall of the tool barrel, a tension spring which is used for applying radial tension to the plug pin towards the plug hole is further arranged in the mounting seat, when the push-pull mechanism is in an initial position, the plug hole is positioned below the mounting hole, when the push-pull mechanism moves to the locking position relative to the tool barrel, the mounting hole and the plug hole are aligned and communicated, and the plug pin is inserted into the plug hole under the radial tension applied by the tension spring, so that the locking assembly and the tool barrel are in locking connection.

11. The downhole gas lift valve casting and fishing device according to claim 10, wherein the locking assembly further comprises a pull rod arranged in the mounting seat, the pull rod is rotatably connected with the mounting seat, the rotary connection part of the pull rod and the mounting seat is a pivot of the pull rod, the lower end of the pull rod is rotatably connected with the plug pin, one end of the tension spring is connected with the lower end of the pull rod, the other end of the tension spring is connected with the mounting seat, the upper end of the pull rod abuts against the inner side wall of the tool cylinder opposite to the plug hole under the pulling force of the tension spring, the unlocking switch pushes the pull rod to rotate around the pivot by being inserted between the upper end of the pull rod and the inner side wall of the tool cylinder, and the pull rod pulls the plug pin out of the plug hole by rotation so as to release the locking between the push-pull mechanism and the tool cylinder.

12. The downhole gas lift valve bailing device of claim 11, wherein the unlocking switch is an unlocking wedge, the unlocking switch is rotatably connected with the clamping assembly, the unlocking wedge has a closed position and an open position towards the pull rod, and a first torsion spring capable of driving the unlocking wedge to rotate from the closed position to the open position is arranged between the unlocking wedge and the clamping assembly;

when the push-pull mechanism is located at the initial position, the push-pull mechanism limits the unlocking wedge to a closed position; when the push-pull mechanism moves from the initial position to the locking position, the push-pull mechanism is separated from the clamping assembly, and the unlocking wedge rotates to an opening position under the drive of the first torsion spring; when the unlocking wedge is inserted between the pull rod and the inner side wall of the tool cylinder, the pull rod rotates under the pushing of the unlocking wedge and pulls the plug pin out of the plug hole.

13. The downhole gas lift valve bailing device of claim 2, wherein the latch assembly has an activated state extending out of the tool pot, an inactivated state within the tool pot, and a deactivated state within the tool pot, the latch assembly being capable of latching with the latch structure when the latch assembly is in the activated state;

when the underground gas lift valve throwing and fishing device is in a fishing working state, the clamping assembly of the fishing driving device is in an activated state, the clamping assembly of the throwing driving device is in a non-activated state, and the push-pull mechanism of the fishing driving device can push the fishing head out of the tool cylinder and pull the fishing head back into the tool cylinder through the fishing window;

when the underground gas lift valve throwing and fishing device is in a throwing working state, the clamping assembly of the throwing driving device is in an activated state, the clamping assembly of the fishing driving device is in a failure state, and the push-pull mechanism of the throwing driving device can push the throwing head out of the tool cylinder and pull the throwing head back into the tool cylinder through the throwing window.

14. The downhole gas lift valve bailing device of claim 13, wherein the tool barrel has an opening in a sidewall thereof, wherein the clamp assembly includes a base and a movable assembly extendable out of the tool barrel through the opening, the movable assembly rotatably coupled to the base, the movable assembly having a home position and a retracted position relative to the base, the retracted position being on a side of the home position remote from the opening, the movable assembly rotatable relative to the tool barrel between the home position and the retracted position;

When the clamping assembly is in an activated state, the movable assembly is positioned at the original position, and the movable assembly extends out of the tool cylinder; when the clamping assembly is in a non-activated state, the movable component is located in the retracted position, and the movable component is located in the tool cylinder.

15. The downhole gas lift valve bailing device of claim 14, wherein a compression spring is disposed between the base and a side of the movable assembly facing away from the opening, the downhole gas lift valve bailing device further comprising an unlock trigger disposed within the tool barrel, the unlock trigger being capable of positioning the movable assembly in the retracted position to maintain the latch assembly in an inactive state, the movable assembly being rotated from the retracted position to the home position by the spring force of the compression spring after the unlock trigger releases the positioning of the movable assembly.

16. The downhole gas lift valve bailing device of claim 14, wherein the movable assembly includes a movable block and a latch block extendable out of the tool pot through the opening, the movable block rotatably coupled to the base, the latch block rotatably coupled to the movable block, the latch block having an extended position and a retracted position relative to the movable block, the retracted position being on a side of the extended position remote from the opening, the latch block being rotatable relative to the movable block between the extended position and the retracted position;

When the clamping assembly is in an activated state, the clamping block is positioned at the extending position, and the clamping block extends out of the tool cylinder; when the clamping assembly is in a non-activated state, the clamping block is positioned at the extending position and positioned in the tool cylinder; when the clamping assembly is in a failure state, the clamping block is located at the retracted position, and the clamping block is located in the tool cylinder.

17. The downhole gas lift valve bailing device of claim 16, wherein a locking member is disposed between the latch and the movable block, the locking member positioning the latch in the extended position by connecting the latch and the movable block.

18. The downhole gas lift valve bailing device of claim 17, wherein a release switch is disposed between the push-pull mechanism and the latch assembly to release the connection of the latch to the latch and the movable block, the release switch being mounted on the push-pull mechanism, the release switch moving with the push-pull mechanism toward the latch when the push-pull mechanism moves from the latched position toward the initial position, the release switch releasing the connection of the latch to the movable block when the release switch moves to the latch, the latch rotating to the retracted position, the latch assembly switching to the disabled state.

19. The downhole gas lift valve bailing device of claim 18, wherein the locking member is a locking pin disposed within the latch block, the locking pin connecting the latch block and the movable block by insertion of the movable block; the clamping assembly further comprises a bolt and a jacking pin, the bolt is inserted into the base, the jacking pin is inserted into the movable block, when the locking pin is inserted into the movable block and the movable block is located at the original position, the locking pin, the jacking pin and the bolt are sequentially jacked from top to bottom, and the release switch sequentially moves upwards through pushing the bolt, the jacking pin and the locking pin, the locking pin is pushed out of the movable block, and the locking pin is enabled to be removed from the connection between the movable block and the clamping block.

20. The downhole gas lift valve bailing device of claim 19, wherein the release switch is a ram rotatably coupled to the push-pull mechanism, the ram having a stowed position and an open position toward the latch, a second torsion spring disposed between the ram and the push-pull mechanism capable of driving the ram from the stowed position toward the open position;

When the push-pull mechanism is in the initial position, the clamping assembly limits the ejector rod to the retracted position; when the push-pull mechanism moves from the initial position to the locking position, the push-pull mechanism is separated from the clamping assembly, and the ejector rod rotates from the retracted position to the open position under the drive of the second torsion spring; when the push-pull mechanism moves from the locking position to the initial position, the ejector rod pushes the bolt, the ejector pin and the locking pin to sequentially move upwards so as to eject the locking pin out of the movable block.

21. The downhole gas lift valve bailing device of claim 17, wherein a third torsion spring is disposed between the latch and the movable block to drive the latch to rotate from the extended position toward the retracted position, the latch being driven by the third torsion spring to rotate from the extended position to the retracted position when the locking member removes the connection between the latch and the movable block.

22. The downhole gas lift valve casting and fishing device of claim 13, further comprising an unlocking trigger device arranged in the tool cylinder, wherein the unlocking trigger device is arranged between the casting and driving device and locks the clamping assembly of the casting and driving device in an inactive state when the downhole gas lift valve casting and fishing device is in a fishing working state, and the gas lift valve fished by the fishing head triggers the unlocking trigger device after the fishing and driving device pulls the gas lift valve fished by the fishing head back into the tool cylinder, and the unlocking trigger device releases the locking of the clamping assembly of the casting and driving device, so that the clamping assembly of the casting and driving device is switched to an active state.

23. The downhole gas lift valve casting and fishing device according to claim 22, wherein the casting and fishing driving device, the unlocking triggering device and the casting and driving device are sequentially arranged from top to bottom, the unlocking triggering device comprises a connecting rod seat, a connecting rod mechanism and an unlocking plate, the connecting rod seat is fixedly connected with the tool barrel, the lower end of the connecting rod mechanism is rotationally connected with the connecting rod seat, and the upper end of the connecting rod mechanism is rotationally connected with the unlocking plate;

the connecting rod mechanism is in a bending state and an extending state, before the gas lift valve salvaged by the salvage head enters the tool cylinder, the connecting rod mechanism is in the bending state, the unlocking plate locks the clamping assembly of the throwing driving device in an inactive state, when the gas lift valve salvaged by the salvage head enters the tool cylinder, pushing force for pushing the connecting rod mechanism to extend is applied to the connecting rod mechanism, so that the connecting rod mechanism extends upwards and drives the unlocking plate to move upwards, and when the connecting rod mechanism is switched to the extending state, the unlocking plate is separated from the clamping assembly of the throwing driving device and releases the locking of the clamping assembly of the throwing driving device.

24. The downhole gas lift valve bailing device of claim 23, wherein the linkage mechanism comprises a first link and a second link, the lower end of the first link is rotatably connected to the link seat, and the upper end of the first link is rotatably connected to the lower end of the second link; the upper end of the second connecting rod is suspended with a sliding rod, the upper end of the sliding rod is rotationally connected with the upper end of the second connecting rod, the lower end of the sliding rod is connected with the unlocking plate, and the sliding rod and the unlocking plate are both arranged along the axial direction of the tool cylinder;

when the connecting rod mechanism is in a bending state, the first connecting rod and the second connecting rod enclose a triangular structure, and the connecting position of the first connecting rod and the second connecting rod is positioned at the salvage window; when the linkage mechanism is in an extended state, the first link and the second link are extended into a straight-bar structure.

25. The downhole gas lift valve casting and fishing device according to claim 2, wherein the downhole installation position of the gas lift valve is a valve cylinder fixed in the downhole working cylinder, a guide sleeve is further arranged in the downhole working cylinder, the guide sleeve is positioned above the valve cylinder, the clamping structure is a guide groove arranged on the guide sleeve, the guide groove is provided with a limiting top wall, and when the clamping assembly is inserted into the guide groove and props against the limiting top wall, the guide groove is clamped with the clamping assembly and limits the clamping assembly to move upwards.

26. The downhole gas lift valve bailing device of claim 25, wherein the notch of the guide slot is downwardly facing, the notch of the guide slot has a guide ramp along which the latch assembly slides into the guide slot by lifting the tool pot, the downhole gas lift valve bailing device rotates relative to the downhole mandrel while the latch assembly slides along the guide ramp, and the bailing head of the bailing drive and the launch head of the launch drive are aligned with the valve pot as the latch assembly moves into latching engagement with the guide slot.

27. The downhole gas lift valve retrieval apparatus of claim 25, wherein the downhole gas lift valve retrieval apparatus comprises the retrieval head and the retrieval head.

28. An underground gas lift valve throwing and fishing method, which is characterized in that the underground gas lift valve throwing and fishing device is adopted to complete gas lift valve throwing and fishing operation and gas lift valve throwing and fishing operation, and the underground gas lift valve throwing and fishing method comprises the following steps:

loading a fishing head into the tool cylinder, connecting the fishing head with the fishing driving device, loading a throwing head connected with a new gas lift valve into the tool cylinder, and connecting the throwing head with the throwing driving device;

The underground gas lift valve throwing and fishing device is put into an underground working cylinder;

the salvage head is moved out of the tool cylinder through the salvage driving device, and after the salvage head captures an old gas lift valve in the underground working cylinder, the salvage head is moved into the tool cylinder through the salvage driving device, so that the salvage operation of the gas lift valve is completed;

the throwing head is moved out of the tool cylinder through the throwing driving device, and after the throwing head throws the new gas lift valve to a preset position in the underground working cylinder, the throwing head is moved into the tool cylinder through the throwing driving device, so that the gas lift valve throwing operation is completed;

and lifting the underground gas lift valve throwing and fishing device to the ground.