Emergency releasing device for downhole operation non-standard outer diameter tool

Abstract

The invention relates to the technical field of emergency releasing, in particular to a downhole operation non-standard outer diameter tool emergency releasing device which comprises a driving assembly, a left clamping assembly, a right clamping assembly, a front positioning seat and a rear positioning seat, the front positioning seat and the rear positioning seat are arranged in a front-back spaced mode, and the left clamping assembly and the right clamping assembly are arranged between the front positioning seat and the rear positioning seat in a left-right spaced mode. The left clamping assembly and the right clamping assembly can clamp the pipe rod when getting close to each other. The device is reasonable and compact in structure and convenient to use, after the driving assembly acts, the left clamping assembly and the right clamping assembly are driven to get close to each other to clamp a pipe column or get away from each other to loosen the pipe column, and the clamping and releasing effects on a non-standard outer diameter tool string in a well can be achieved; the front positioning seat, the rear positioning seat and the blowout preventer can be fixedly mounted together, so that the dismounting difficulty between the blowout preventer and the positioning seat is reduced, transportation and transfer are facilitated, and the blowout preventer positioning seat has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of emergency release, in particular to an emergency release device for a tool with a non-standard outer diameter for underground operations. Background Art

[0002] Domestic onshore oil and gas fields have clear standards for well control emergency shut-in procedures under various working conditions of downhole operations. However, when raising and lowering non-standard outer diameter tool strings, if the standard procedures are followed to quickly connect the blowout preventer, or if an annular blowout preventer is used to shut in the well, the well cannot be shut down in a timely and accurate manner, which may cause a blowout or a blowout out of control accident, leading to fire, explosion or casualties.

[0003] During the underground operation, once the signs of blowout are found, the well must be shut down immediately according to the procedure to prevent the blowout from getting out of control. According to the petroleum industry standard SY / T 6690 "Technical Regulations for Well Control in Downhole Operations", when overflow occurs when lifting and lowering large-diameter tools (such as packers), follow the procedures of sending (sending signals), stopping (stopping the operation of lifting and lowering the pipe string), grabbing (grabbing and connecting the single blowout preventer), closing (first closing the blowout preventer, then closing the internal blowout preventer tool), closing (closing the control gate valve), and watching (observing and recording the pressure of the tubing and casing, as well as the increase and decrease of the circulating tank pressure well fluid, and quickly reporting to the on-duty cadres and the Party A supervisor) to shut down the well. When lifting and lowering the perforating gun string or the submersible electric pump unit to shut down the well, due to various objective factors, there are problems such as the internal blowout preventer tool cannot be connected and the oil casing annulus cannot be sealed, and the well closing operation cannot be completed within three minutes. Therefore, when the signs of blowout appear, the device is used to safely drop the non-standard outer diameter tool string into the well to achieve the purpose of emergency release and rapid well closing to prevent the blowout from getting out of control. Summary of the invention

[0004] The present invention provides an emergency release device for non-standard outer diameter tools for underground operations, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem of uncontrolled blowout accidents, fires, explosions or casualties caused by the existing non-standard outer diameter tool string being lifted and lowered.

[0005] The technical solution of the present invention is achieved through the following measures: an emergency release device for non-standard outer diameter tools for underground operations, comprising a driving assembly, a left clamping assembly, a right clamping assembly, and a front positioning seat and a rear positioning seat arranged at intervals in the front and rear directions, a left clamping assembly and a right clamping assembly are arranged at intervals in the left and right directions between the front positioning seat and the rear positioning seat, the left clamping assembly and the right clamping assembly can clamp the pipe rod when they are close to each other, and a driving assembly is provided on the upper part of the front positioning seat, which can make the left clamping assembly and the right clamping assembly approach each other or move away from each other.

[0006] The following are further optimizations and / or improvements to the above technical solutions: The above-mentioned driving assembly may include a left driving mechanism and a right driving mechanism. The left driving mechanism includes a fixed frame and a hydraulic cylinder. The fixed frame is in a U-shape with an opening to the right. The right side of the front part of the fixed frame is fixedly installed with the left end of the front positioning seat, and the right side of the rear part of the fixed frame is fixedly installed with the left end of the rear positioning seat. The inner side of the left part of the fixed frame is rotatably installed with the left end of the hydraulic cylinder. The right end of the piston rod of the hydraulic cylinder is installed with the left part of the left clamping assembly. The structure of the right driving mechanism is the same as that of the left driving mechanism and is symmetrically arranged.

[0007] The above-mentioned left clamping assembly may include a support plate, a first chuck seat, a second chuck seat, a third chuck seat, a front connecting arm, a rear connecting arm and a push plate. The support plate is slidably installed on the inner side of the right part of the fixed frame. The front side and the rear side of the upper side of the right part of the support plate are fixedly installed with a front fixing rod and a rear fixing rod at intervals. The rear part of the first chuck seat is rotatably installed with the front fixing rod, the front part of the second chuck seat is installed with the front fixing rod, the rear part of the second chuck seat is installed with the rear fixing rod, the front part of the third chuck seat is rotatably installed with the rear fixing rod. The front part of the first chuck seat is rotatably installed with the front connecting arm, the rear part of the third chuck seat is rotatably installed with the rear connecting arm. A push plate is installed between the left parts of the front connecting arm and the rear connecting arm. The left side of the middle part of the push plate is rotatably installed with the right end of the piston rod of the hydraulic cylinder. The structure of the right clamping assembly is the same as that of the left clamping assembly and is symmetrically arranged.

[0008] The above-mentioned left clamping assembly may further include a guide rod, a guide plate and an elastic resetting member. A vertical guide plate is fixedly installed on the upper side of the middle part of the support plate corresponding to the position between the push plate and the second chuck seat. A left-right through guide hole is provided on the upper left side of the guide plate. A guide rod with its left end fixedly installed with the right side of the middle part of the push plate is sleeved in the guide hole. An elastic resetting member is sleeved on the outer side of the guide rod corresponding to the position between the guide plate and the push plate.

[0009] The above-mentioned fixed frame may include a fixing plate, a front cross tie rod and a rear cross tie rod. The upper left end of the front positioning seat is fixedly installed with the right end of the horizontally arranged front cross tie rod. The upper left end of the rear positioning seat is fixedly installed with the right end of the rear cross tie rod arranged parallel to the front cross tie rod. The front part of the fixing plate is fixedly installed with the left end of the front cross tie rod. The rear part of the fixing plate is fixedly installed with the left end of the rear cross tie rod. The left side of the middle part of the fixing plate is rotatably installed with the left end of the hydraulic cylinder. A front guide sleeve slidably installed on the outer side of the front cross tie rod is fixedly installed on the upper side of the front part of the support plate corresponding to the position in front of the front connecting arm. A rear guide sleeve slidably installed on the outer side of the rear cross tie rod is fixedly installed on the upper side of the rear part of the support plate corresponding to the position behind the rear connecting arm.

[0010] The first cava seat, the second cava seat and the third cava seat can be provided with a T-shaped mounting groove which runs through from top to bottom and is wider on the left and narrower on the right on the middle right side. The upper part of each mounting groove is inclined to the left relative to the lower part. A cava tooth matching the mounting groove is slidably installed in each mounting groove. A plurality of anti-slip grooves are arranged at intervals on the right side of each cava tooth. The first cava seat, the second cava seat and the third cava seat are provided with a sliding hole which runs through from top to bottom and whose inner diameter gradually decreases from top to bottom on the upper side of the right part. The right part of each sliding hole is connected with the left side of the mounting groove at the corresponding position. The central axis of each sliding hole is parallel to the inner wall of the left side of the mounting groove at the corresponding position. Each sliding hole is provided with a mounting block whose right side is fixedly installed with the left side of the upper part of the cava tooth at the corresponding position.

[0011] The first slip seat, the second slip seat and the third slip seat may have the same structure.

[0012] The right side of the support plate may be provided with a clamping groove which is narrow on the left and wide on the right and passes through from top to bottom.

[0013] At least two connecting bolts may be fixed at intervals on the lower side of the front positioning seat and the lower side of the rear positioning seat.

[0014] The present invention has a reasonable and compact structure and is easy to use. After the driving component is actuated, it drives the left clamping component and the right clamping component to approach each other and then clamp the pipe string, or to move away from each other and then loosen the pipe string, which can clamp and release the tool string with non-standard outer diameter in the well. By arranging the front positioning seat and the rear positioning seat, the front positioning seat and the rear positioning seat can be fixedly installed together with the blowout preventer, thus reducing the difficulty of disassembly and assembly between the blowout preventer and facilitating transportation and transfer. It has the characteristics of safety, labor saving, simplicity and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attached Figure 1 This is a schematic diagram of the main structure of the first embodiment.

[0016] Attached Figure 2 It is a schematic diagram of the top structure of the first embodiment.

[0017] Attached Figure 3 It is a schematic diagram of the three-dimensional structure of embodiment 1.

[0018] Attached Figure 4 It is a schematic diagram of the front cross-sectional structure of the second slip seat in Example 3.

[0019] Attached Figure 5 The three-dimensional structure of the second slip seat in the third embodiment is shown in FIG. Figure 1 .

[0020] Attached Figure 6 The three-dimensional structure of the second slip seat in the third embodiment is shown in FIG. Figure 2 .

[0021] Attached Figure 7 It is a schematic diagram of the main structure of the kava tooth in Example 6.

[0022] Attached Figure 8 The three-dimensional structure of the kava tooth in Example 6 is shown in FIG. Figure 1 .

[0023] Attached Fig. 9 The three-dimensional structure of the kava tooth in Example 6 is shown in FIG. Figure 2 .

[0024] Attached Fig.10 This is a schematic diagram of the main structure of Example 9.

[0025] Attached Fig.11 This is a schematic diagram of the top structure of the ninth embodiment.

[0026] The codes in the accompanying drawings are: 1 is the front positioning seat, 2 is the rear positioning seat, 3 is the right driving mechanism, 4 is the hydraulic cylinder, 5 is the support plate, 6 is the first slip seat, 7 is the second slip seat, 8 is the third slip seat, 9 is the push plate, 10 is the front fixing rod, 11 is the rear fixing rod, 12 is the front connecting arm, 13 is the rear connecting arm, 14 is the right clamping assembly, 15 is the guide rod, 16 is the guide plate, 17 is the elastic reset member, 18 is the fixing plate, 19 is the front cross rod, 20 is the rear cross rod, 21 is the front guide sleeve, 22 is the rear guide sleeve, 23 is the mounting groove, 24 is the mounting block, 25 is the slip tooth, 26 is the anti-slip groove, 27 is the clamping groove, 28 is the connecting bolt, and 29 is the cover plate. DETAILED DESCRIPTION

[0027] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0028] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The positional relationships such as front, back, top, bottom, left, and right are described according to the layout directions of the drawings in the specification.

[0029] The present invention will be further described below in conjunction with embodiments and drawings: Embodiment 1: As shown in the attached Figure 1 , 2, as shown in FIGS. 3, the emergency releasing device for downhole operation non-standard outer diameter tool includes a driving assembly, a left clamping assembly, a right clamping assembly 14, and a front positioning seat 1 and a rear positioning seat 2 arranged at intervals before and after. A left clamping assembly and a right clamping assembly 14 are arranged at intervals left and right between the front positioning seat 1 and the rear positioning seat 2. When the left clamping assembly and the right clamping assembly 14 approach each other, they can clamp the pipe string. The upper part of the front positioning seat 1 is provided with a driving assembly that can make the left clamping assembly and the right clamping assembly 14 approach or move away from each other. During the use process, after the driving assembly acts, it drives the left clamping assembly and the right clamping assembly 14 to approach each other and clamp the pipe string or move away from each other and release the pipe string, which can play a role in clamping and releasing the non-standard outer diameter tool string in the well. By setting the front positioning seat 1 and the rear positioning seat 2, the front positioning seat 1 and the rear positioning seat 2 can be fixedly installed together with the blowout preventer, thus reducing the disassembly and assembly difficulty between the blowout preventer and facilitating transportation and transfer. The structure of the present invention is reasonable and compact, easy to use, and has the characteristics of safety, labor saving, simplicity, and high efficiency.

[0030] According to actual needs, the above-mentioned emergency releasing device for downhole operation non-standard outer diameter tool can be further optimized and / or improved: Embodiment 2: As an optimization of the above embodiment, as shown in FIGS. Figure 1 , 2 , 3, the driving assembly includes a left driving mechanism and a right driving mechanism 3. The left driving mechanism includes a fixed frame and a hydraulic cylinder 4. The fixed frame is in a U-shape with an opening to the right. The right side of the front part of the fixed frame is fixedly installed with the left end of the front positioning seat 1, and the right side of the rear part of the fixed frame is fixedly installed with the left end of the rear positioning seat 2. The left inner side of the fixed frame is rotatably installed with the left end of the hydraulic cylinder 4, and the right end of the piston rod of the hydraulic cylinder 4 is installed with the left part of the left clamping assembly. The structure of the right driving mechanism 3 is the same as that of the left driving mechanism and is symmetrically arranged. During the use process, the hydraulic cylinder 4 is drivingly connected to the hydraulic system of the workover rig used on site, which can improve the safety and stability of the operation, can clamp various outer diameter pipe strings, can flexibly adjust the left clamping assembly and the right clamping assembly 14, and increase the applicable range.

[0031] Embodiment 3: As an optimization of the above embodiment, as shown in FIGS. Figures 1 to 6As shown, the left clamping assembly includes a support plate 5, a first cava seat 6, a second cava seat 7, a third cava seat 8, a front connecting arm 12, a rear connecting arm 13 and a push plate 9. The support plate 5 is slidably installed on the inner right side of the fixed frame, and a front fixed rod 10 and a rear fixed rod 11 are fixedly installed at intervals on the upper right side of the support plate 5. The rear part of the first cava seat 6 and the front fixed rod 10 are rotatably installed together, the front part of the second cava seat 7 and the front fixed rod 10 are installed together, the rear part of the second cava seat 7 and the rear fixed rod 11 are installed together, the front part of the third cava seat 8 and the rear fixed rod 11 are rotatably installed together, the front part of the first cava seat 6 is rotatably installed, and the rear part of the third cava seat 8 is rotatably installed on the rear part of the third cava seat 8. A push plate 9 is installed between the left part of the front connecting arm 12 and the left part of the rear connecting arm 13. The left side of the middle part of the push plate 9 is rotatably installed with the right end of the piston rod of the hydraulic cylinder 4. The right clamping assembly 14 has the same structure as the left clamping assembly and is symmetrically arranged. During use, through such an arrangement, after the left driving mechanism and the right driving mechanism 3 are actuated, the left clamping assembly and the right clamping assembly 14 can simultaneously approach the clamping pipe column or move away from the loosening pipe column. By arranging the push plate 9, the front connecting arm 12 and the rear connecting arm 13, the movements of the front connecting arm 12 and the rear connecting arm 13 can be synchronized, and the disassembly and assembly between the front connecting arm 12, the rear connecting arm 13 and the piston rod of the hydraulic cylinder 4 are also facilitated.

[0032] Embodiment 4: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2 As shown, the left clamping assembly also includes a guide rod 15, a guide plate 16 and an elastic reset member 17. A vertical guide plate 16 is fixedly installed on the upper middle side of the support plate 5 corresponding to the position between the push plate 9 and the second cava seat 7. A guide hole is provided on the upper left side of the guide plate 16 and passes through the left and right sides. The guide hole is provided with a guide rod 15 whose left end is fixedly installed with the right middle part of the push plate 9. An elastic reset member 17 is installed on the outer side of the guide rod 15 corresponding to the position between the guide plate 16 and the push plate 9. According to the needs, the elastic return member 17 is an existing well-known compression spring. By setting the guide rod 15, the movements of the front connecting arm 12 and the rear connecting arm 13 can be consistent, so that they can clamp or release the pipe column together, avoiding the inconsistent movements of the front connecting arm 12 and the rear connecting arm 13, which may cause the pipe column to be damaged after uneven force. By setting the elastic return member 17, after the piston rod of the hydraulic cylinder 4 is retracted, the elastic return member 17 can make the left clamping assembly and the right clamping assembly 14 quickly separate from the pipe column to complete the release operation, thereby improving the sensitivity of the action.

[0033] Embodiment 5: As an optimization of the above embodiment, as shown in the attached Figure 1 , 2As shown in , 3, the fixing frame includes a fixing plate 18, a front tie rod 19 and a rear tie rod 20, the upper left end of the front positioning seat 1 and the right end of the front tie rod 19 arranged in the left and right directions are fixedly installed together, the upper left end of the rear positioning seat 2 and the right end of the rear tie rod 20 arranged parallel to the front tie rod 19 are fixedly installed together, the front part of the fixing plate 18 and the left end of the front tie rod 19 are fixedly installed together, the rear part of the fixing plate 18 and the left end of the rear tie rod 20 are fixedly installed together, the left middle part of the fixing plate 18 and the left end of the hydraulic cylinder 4 are rotatably installed together, the front upper side of the support plate 5 corresponding to the front position of the front connecting arm 12 is fixedly installed with a front guide sleeve 21 slidably installed on the outside of the front tie rod 19, and the rear upper side of the support plate 5 corresponding to the rear position of the rear connecting arm 13 is fixedly installed with a rear guide sleeve 22 slidably installed on the outside of the rear tie rod 20. According to the requirements, the lower side of the support plate 5 is located above the lower side of the front positioning seat 1. During use, through such a setting, after the piston rod of the hydraulic cylinder 4 is retracted, the push plate 9 can be moved to the left, so that the right end of the front connecting arm 12 and the right end of the rear connecting arm 13 swing, driving the front end of the first slip seat 6 and the rear end of the third slip seat 8 to swing outward, so as to release the pipe string after moving away from the right clamping assembly 14. Similarly, after the piston rod of the hydraulic cylinder 4 is extended, the front end of the first slip seat 6 and the rear end of the third slip seat 8 swing inward, so as to clamp the pipe string after approaching the right clamping assembly 14. After the left driving mechanism drives the left clamping assembly and the right driving mechanism 3 drives the right clamping assembly 14 to approach each other and abut against the outside of the pipe string, the front tie rod 19 and the rear tie rod 20 are bent so that the lower side of the support plate 5 fits with the upper flange surface of the blowout preventer, so as to support the pipe string, reduce the load of the tool, and extend the service life.

[0034] Embodiment 6: As an optimization of the above embodiment, as shown in the attached Figures 1 to 9As shown, a T-shaped mounting groove 23 which runs through from top to bottom and is wider on the left and narrower on the right is provided on the right middle part of the first cava seat 6, the second cava seat 7 and the third cava seat 8. The upper part of each mounting groove 23 is inclined to the left relative to the lower part. A cava tooth 25 matching the mounting groove 23 is slidably installed in each mounting groove 23. A plurality of anti-slip grooves 26 are provided at intervals on the right side of each cava tooth 25. A sliding hole which runs through from top to bottom and whose inner diameter gradually decreases from top to bottom is provided on the upper right side of the first cava seat 6, the second cava seat 7 and the third cava seat 8. The right part of each sliding hole is connected with the left side of the mounting groove 23 at the corresponding position. The central axis of each sliding hole is parallel to the inner wall of the left side of the mounting groove 23 at the corresponding position. A mounting block 24 is installed in each sliding hole, the right side of which is fixedly installed with the upper left side of the cava tooth 25 at the corresponding position. The upper part of each mounting groove 23 is inclined to the left relative to the lower part, so that when the mounting block 24 slides downward in the mounting groove 23, it can drive the cava teeth 25 to move closer to the right, thereby clamping the pipe column. The anti-slip groove 26 can increase the friction between the cava teeth 25 and the pipe column. The setting of the mounting block 24 facilitates the rapid disassembly and assembly between the cava teeth 25 and the cava seat, reduces maintenance costs, and the inner diameter of the sliding hole gradually decreases from top to bottom. In this way, mounting blocks 24 of various specifications can be selected, thereby driving the cava teeth 25 to clamp pipe columns of various specifications. When the cava teeth 25 are close to each other, they can clamp pipe columns with outer diameters of 73mm to 140mm.

[0035] Embodiment 7: As an optimization of the above embodiment, as shown in the attached Figures 1 to 6 As shown, the first slip seat 6, the second slip seat 7 and the third slip seat 8 have the same structure. In use, through such an arrangement, the manufacturing cost of the slip seat can be reduced, the interchangeability of the first slip seat 6, the second slip seat 7 and the third slip seat 8 can be improved, and the installation difficulty of the slip seat can be reduced.

[0036] Embodiment 8: As an optimization of the above embodiment, as shown in the attached Figure 2 , 3 As shown, a clamping groove 27 which is narrow on the left and wide on the right and passes through from top to bottom is provided on the right side of the support plate 5. According to the requirements, the cross section of the clamping groove 27 is an isosceles trapezoid. In the process of use, such a setting can guide the pipe column, which is convenient for the subsequent clamping of the pipe column.

[0037] Embodiment 9: As an optimization of the above embodiment, as shown in the attached Fig.10 , 11As shown, at least two connecting bolts 28 are fixed at intervals on the lower side of the front positioning seat 1 and the lower side of the rear positioning seat 2. According to the requirements, a cover plate 29 is installed between the rear part of the front positioning seat 1 and the front part of the rear positioning seat 2. The upper side of the cover plate 29 is provided with a mounting hole that passes through from top to bottom. The connecting bolts 28 on the lower side of the front positioning seat 1 and the connecting bolts 28 on the lower side of the rear positioning seat 2 are evenly distributed along the circumference of the blowout preventer flange. Through such an arrangement, the front positioning seat 1, the rear positioning seat 2 and the blowout preventer are facilitated to be quickly disassembled and assembled, and the action stability of the driving mechanism is improved.

[0038] When performing emergency release operation on the perforating gun string, the use process of this embodiment is as follows: When lifting and lowering a perforating gun string with a length of more than 20 meters at the operation site, install the emergency release device for non-standard outer diameter tools for downhole operations on the upper flange of the wellhead blowout preventer in advance, connect the hydraulic cylinder 4 to the hydraulic power source of the workover rig (or use an independent hydraulic station) and debug it to ensure normal operation.

[0039] During the process of lifting and lowering the perforating gun string, when a blowout sign is found, the perforating gun string is lowered to the wellhead using a workover rig, so that the piston rod of the hydraulic cylinder 4 is extended, and the left clamping assembly and the right clamping assembly 14 are pushed closer to each other to complete the clamping and hanging of the pipe string in the well; the traveling block of the workover rig is lowered, the pipe string load borne by the traveling block is unloaded, the tubing elevator for lifting the pipe string is opened, and the traveling block is lifted so that the tubing elevator is located above the wellhead operator without affecting normal operation; the piston rod of the hydraulic cylinder 4 is retracted, the left clamping assembly and the right clamping assembly 14 are moved away from each other, the perforating gun string in the well loses the clamping force and the supporting force and falls into the well, the full-seal gate blowout preventer and the casing gate are closed, and the well closing operation is completed.

[0040] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. An emergency release device for non-standard outer diameter tools for underground operations, characterized in that It includes a driving component, a left clamping component, a right clamping component, and a front positioning seat and a rear positioning seat that are arranged at intervals in the front and rear directions. The left clamping component and the right clamping component are arranged at intervals in the left and right directions between the front positioning seat and the rear positioning seat. When the left clamping component and the right clamping component approach each other, they can clamp the pipe rod. The upper part of the front positioning seat is provided with a driving component that can make the left clamping component and the right clamping component approach or move away from each other.

2. The emergency release device for non-standard outer diameter tools for underground operations according to claim 1 is characterized in that The driving component includes a left driving mechanism and a right driving mechanism. The left driving mechanism includes a fixed frame and a hydraulic cylinder. The fixed frame is in a U shape with an opening to the right. The right side of the front part of the fixed frame is fixedly installed with the left end of the front positioning seat, and the right side of the rear part of the fixed frame is fixedly installed with the left end of the rear positioning seat. The left side inside the fixed frame is rotatably installed with the left end of the hydraulic cylinder. The right end of the piston rod of the hydraulic cylinder is installed with the left part of the left clamping component. The structure of the right driving mechanism is the same as that of the left driving mechanism and is symmetrically arranged.

3. The emergency release device for non-standard outer diameter tools for underground operations according to claim 2 is characterized in that The left clamping component includes a support plate, a first chuck seat, a second chuck seat, a third chuck seat, a front connecting arm, a rear connecting arm, and a push plate. The support plate is slidably installed inside the right part of the fixed frame. The front fixing rod and the rear fixing rod are fixedly installed at intervals in the front and rear directions on the upper side of the right part of the support plate. The rear part of the first chuck seat is rotatably installed with the front fixing rod, the front part of the second chuck seat is installed with the front fixing rod, the rear part of the second chuck seat is installed with the rear fixing rod, the front part of the third chuck seat is rotatably installed with the rear fixing rod. The front part of the first chuck seat is rotatably installed with the front connecting arm, the rear part of the third chuck seat is rotatably installed with the rear connecting arm. A push plate is installed between the left part of the front connecting arm and the left part of the rear connecting arm. The left side of the middle part of the push plate is rotatably installed with the right end of the piston rod of the hydraulic cylinder. The right clamping component has the same structure as the left clamping component and is symmetrically arranged.

4. The emergency release device for non-standard outer diameter tools for underground operations according to claim 3 is characterized in that The left clamping component further includes a guide rod, a guide plate, and an elastic resetting member. A vertical guide plate is fixedly installed on the upper side of the middle part of the support plate corresponding to the position between the push plate and the second chuck seat. A guide hole that penetrates left and right is provided on the upper left side of the guide plate. A guide rod with its left end fixedly installed with the right side of the middle part of the push plate is sleeved in the guide hole. An elastic resetting member is sleeved on the outer side of the guide rod corresponding to the position between the guide plate and the push plate.

5. The emergency release device for non-standard outer diameter tools for underground operations according to claim 4 is characterized in that The fixed frame includes a fixing plate, a front cross tie rod, and a rear cross tie rod. The left end of the upper part of the front positioning seat is fixedly installed with the right end of the horizontally arranged front cross tie rod. The left end of the upper part of the rear positioning seat is fixedly installed with the right end of the rear cross tie rod that is arranged parallel to the front cross tie rod. The front part of the fixing plate is fixedly installed with the left end of the front cross tie rod. The rear part of the fixing plate is fixedly installed with the left end of the rear cross tie rod. The left side of the middle part of the fixing plate is rotatably installed with the left end of the hydraulic cylinder. A front guide sleeve that is slidably installed on the outer side of the front cross tie rod is fixedly installed on the upper side of the front part of the support plate corresponding to the position in front of the front connecting arm. A rear guide sleeve that is slidably installed on the outer side of the rear cross tie rod is fixedly installed on the upper side of the rear part of the support plate corresponding to the position behind the rear connecting arm.

6. The emergency release device for non-standard outer diameter tools for underground operations according to claim 4 or 5, characterized in that The first cava seat, the second cava seat and the third cava seat are all provided with a T-shaped installation groove which runs through from top to bottom and is wider on the left and narrower on the right on the middle right side. The upper part of each installation groove is inclined to the left relative to the lower part. A cava tooth matching the installation groove is slidably installed in each installation groove. A number of anti-slip grooves are arranged at intervals on the right side of each cava tooth. The first cava seat, the second cava seat and the third cava seat are all provided with a sliding hole which runs through from top to bottom and whose inner diameter gradually decreases from top to bottom on the upper side of the right part. The right part of each sliding hole is connected with the left side of the installation groove at the corresponding position. The central axis of each sliding hole is parallel to the inner wall of the left side of the installation groove at the corresponding position. Each sliding hole is installed with a mounting block on the right side which is fixedly installed with the upper left side of the cava tooth at the corresponding position.

7. The emergency release device for non-standard outer diameter tools for underground operations according to claim 6 is characterized in that The first slip seat, the second slip seat and the third slip seat have the same structure.

8. The emergency release device for non-standard outer diameter tools for underground operations according to claim 3, 4, 5 or 7, characterized in that A clamping groove which is narrow on the left and wide on the right and runs through from top to bottom is arranged on the right side of the supporting plate.

9. The emergency release device for non-standard outer diameter tools for underground operations according to claim 6 is characterized in that A clamping groove which is narrow on the left and wide on the right and runs through from top to bottom is arranged on the right side of the supporting plate.

10. The emergency release device for non-standard outer diameter tools for underground operations according to claim 1 or 2 or 3 or 4 or 5 or 7 or 9, characterized in that At least two connecting bolts are fixed at intervals on the lower side of the front positioning seat and the lower side of the rear positioning seat.

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