Emergency release device for non-standard outer diameter tool of downhole operation

Abstract

The present application relates to the technical field of emergency release technology, and discloses an emergency release device for non-standard outer diameter tools in downhole operation, which comprises a driving assembly, a left clamping assembly, a right clamping assembly, a front positioning seat and a rear positioning seat which are arranged at intervals, and the left clamping assembly and the right clamping assembly are arranged at intervals 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. The present application has reasonable and compact structure, and is convenient to use. After the driving assembly operates, the left clamping assembly and the right clamping assembly are driven to be close to each other to clamp the pipe column or to be far away from each other to release the pipe column. The present application can clamp and release the non-standard outer diameter tool string in the well. The front positioning seat and the rear positioning seat are fixedly installed with the blowout preventer, which reduces the disassembly and assembly difficulty between the front positioning seat, the rear positioning seat and the blowout preventer, and facilitates transportation and transfer. The present application has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of emergency release, and is an emergency release device for non-standard outer diameter tools in downhole operation. BACKGROUND

[0002] There are clear standards for well control emergency shut-in procedures under various working conditions of downhole operation in domestic onshore oil and gas fields, but when a non-standard outer diameter tool string is being tripped in, if the standard procedure is followed to connect a blowout preventer single string or to use an annular blowout preventer to shut in, it cannot achieve timely and accurate shut-in, which may cause blowout or blowout out-of-control accidents, leading to fire and explosion or personnel casualties.

[0003] In the process of downhole operation, once a blowout precursor is found, the well must be shut in immediately according to the procedure to prevent blowout out-of-control. According to the oil industry standard SY / T 6690 "Well Control Technology Procedure for Downhole Operation", when a large-diameter tool (such as a packer) is being tripped in and overflow occurs, the procedure of shut-in is followed, which is to send a signal, stop tripping in the pipe string, connect a blowout preventer single string, shut in the blowout preventer first, then shut in the internal blowout preventer tool, shut in the control gate valve, and observe and record the tubing and casing pressures, as well as the increase or decrease of the circulating tank pressure, and quickly report to the on-duty staff and Party A supervisor. When a perforating gun string or a submersible electric pump unit is being tripped in, due to various objective factors, the internal blowout preventer tool cannot be connected and the oil-casing annulus cannot be sealed, which makes it impossible to complete the shut-in operation within three minutes. Therefore, when a blowout precursor occurs, the device is used to safely drop the non-standard outer diameter tool string into the well, so as to achieve the purpose of emergency release and rapid shut-in, and prevent blowout out-of-control. SUMMARY

[0004] The present application provides an emergency release device for non-standard outer diameter tools in downhole operation, which overcomes the shortcomings of the prior art and effectively solves the problem of blowout out-of-control accidents, fire and explosion, or personnel casualties caused by tripping in non-standard outer diameter tool strings.

[0005] The technical solution of the present application is achieved by the following measures: an emergency release device for non-standard outer diameter tools in downhole operation, comprising a driving assembly, a left clamping assembly, a right clamping assembly, and front and rear positioning seats arranged at intervals, the left clamping assembly and the right clamping assembly being arranged at intervals between the front and rear positioning seats, the left clamping assembly and the right clamping assembly being capable of clamping a pipe rod when they are close to each other, and the driving assembly being arranged on the upper part of the front positioning seat and being capable of making the left clamping assembly and the right clamping assembly close to or away from each other.

[0006] The following is a further optimization or / and improvement of the above-mentioned technical solution:

[0007] The driving assembly can 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 the shape of a Chinese character "fang" with an opening facing right, the front right side of the fixed frame is fixedly installed with the left end of the front positioning seat, the rear right side of the fixed frame is fixedly installed with the left end of the rear positioning seat, the left 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, and the right driving mechanism is the same as the left driving mechanism in structure and is symmetrically arranged.

[0008] The left clamping assembly can include a support plate, a first slip seat, a second slip seat, a third slip seat, a front connecting arm, a rear connecting arm and a push plate, the right inner side of the fixed frame is slidably installed with the support plate, the upper side of the right part of the support plate is fixedly installed with a front fixed rod and a rear fixed rod in front and back, the rear part of the first slip seat is rotatably installed with the front fixed rod, the front part of the second slip seat is installed with the front fixed rod, the rear part of the second slip seat is installed with the rear fixed rod, the front part of the third slip seat is rotatably installed with the rear fixed rod, the front part of the first slip seat is rotatably installed with the front connecting arm, the rear part of the third slip seat is rotatably installed with the rear connecting arm, the 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, and the right clamping assembly is the same as the left clamping assembly in structure and is symmetrically arranged.

[0009] The left clamping assembly can further include a guide rod, a guide plate and an elastic reset member, the upper side of the middle part of the support plate corresponding to the position between the push plate and the second slip seat is fixedly installed with a vertical guide plate, the upper left side of the guide plate is provided with a left-right through guide hole, the guide hole is sleeved with the guide rod fixedly installed with the right side of the middle part of the push plate, and the outer side of the guide rod corresponding to the position between the guide plate and the push plate is sleeved with the elastic reset member.

[0010] The fixed frame can include a fixed plate, a front transverse pull rod and a rear transverse pull rod, the left end of the upper part of the front positioning seat is fixedly installed with the right end of the front transverse pull rod arranged left and right, the left end of the upper part of the rear positioning seat is fixedly installed with the right end of the rear transverse pull rod arranged in parallel with the front transverse pull rod, the front part of the fixed plate is fixedly installed with the left end of the front transverse pull rod, the rear part of the fixed plate is fixedly installed with the left end of the rear transverse pull rod, the left side of the middle part of the fixed plate is rotatably installed with the left end of the hydraulic cylinder, the upper side of the front part of the support plate corresponding to the front position of the front connecting arm is fixedly installed with a front guide sleeve slidably installed on the outer side of the front transverse pull rod, and the upper side of the rear part of the support plate corresponding to the rear position of the rear connecting arm is fixedly installed with a rear guide sleeve slidably installed on the outer side of the rear transverse pull rod.

[0011] The middle right of the first slip seat, the second slip seat and the third slip seat can be provided with a T-shaped installation slot which is through from top to bottom and is wide on the left and narrow on the right, the upper part of each installation slot is inclined to the left relative to the lower part, each installation slot is slidably provided with a slip tooth matched with the installation slot, the right side of each slip tooth is provided with a plurality of anti-skid grooves in an upper and lower interval, the upper side of the right part of the first slip seat, the second slip seat and the third slip seat is provided with a sliding hole which is through from top to bottom and the inner diameter gradually decreases from top to bottom, the right part of each sliding hole is in communication with the left side of the installation slot at the corresponding position, the center axis of each sliding hole is parallel to the left inner wall of the installation slot at the corresponding position, and each sliding hole is provided with an installation block which is fixedly installed with the upper left side of the slip tooth at the corresponding position.

[0012] The first slip seat, the second slip seat and the third slip seat can have the same structure.

[0013] The right side of the support plate can be provided with a clamping groove which is narrow on the left, wide on the right and through from top to bottom.

[0014] The lower side of the front positioning seat and the lower side of the rear positioning seat can be fixedly provided with at least two connecting bolts.

[0015] The present application has the advantages of reasonable and compact structure, convenient use, and the driving assembly drives the left clamping assembly and the right clamping assembly to approach each other to clamp the pipe column or move away from each other to release the pipe column, so that the non-standard outer diameter tool string in the well can be clamped and released, the front positioning seat and the rear positioning seat are fixedly installed with the blowout preventer, so that the disassembly and assembly difficulty between the front positioning seat, the rear positioning seat and the blowout preventer is reduced, transportation and transfer are facilitated, and the present application has the characteristics of safety, labor saving, simplicity and high efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] FIG. 1 is a front view structural schematic diagram of the embodiment one. Figure 1 FIG. 2 is a top view structural schematic diagram of the embodiment one.

[0017] FIG. 3 is a perspective view structural schematic diagram of the embodiment one. Figure 2 FIG. 4 is a front view structural schematic diagram of the second slip seat in the embodiment three.

[0018] FIG. 5 is a top view structural schematic diagram of the second slip seat in the embodiment three. Figure 3 FIG. 6 is a perspective view structural schematic diagram of the second slip seat in the embodiment three.

[0019] FIG. 7 is a front view structural schematic diagram of the third slip seat in the embodiment three. Figure 4 FIG. 8 is a top view structural schematic diagram of the third slip seat in the embodiment three.

[0020] FIG. 9 is a perspective view structural schematic diagram of the third slip seat in the embodiment three. Figure 5 FIG. 10 is a front view structural schematic diagram of the fourth slip seat in the embodiment three. Figure 1

[0021] FIG. 11 is a top view structural schematic diagram of the fourth slip seat in the embodiment three. Figure 6 FIG. 12 is a perspective view structural schematic diagram of the fourth slip seat in the embodiment three. Figure 2

[0022] FIG. 13 is a front view structural schematic diagram of the fifth slip seat in the embodiment three.​​Figure 7 Front view structure diagram of the dog tooth in Example Six.

[0023] Figure Figure 8 Front view structure diagram of the dog tooth in Example Six Figure 1 .

[0024] Figure Figure 9 Front view structure diagram of the dog tooth in Example Six Figure 2 .

[0025] Figure Figure 10 Front view structure diagram of the dog tooth in Example Six

[0026] Figure Figure 11 Front view structure diagram of the dog tooth in Example Six

[0027] The codes in the drawings are as follows: 1 is a front positioning seat, 2 is a rear positioning seat, 3 is a right driving mechanism, 4 is a hydraulic cylinder, 5 is a support plate, 6 is a first dog tooth seat, 7 is a second dog tooth seat, 8 is a third dog tooth seat, 9 is a push plate, 10 is a front fixed rod, 11 is a rear fixed rod, 12 is a front connecting arm, 13 is a rear connecting arm, 14 is a right clamping assembly, 15 is a guide rod, 16 is a guide plate, 17 is an elastic reset piece, 18 is a fixed plate, 19 is a front horizontal pull rod, 20 is a rear horizontal pull rod, 21 is a front guide sleeve, 22 is a rear guide sleeve, 23 is a mounting groove, 24 is a mounting block, 25 is a dog tooth, 26 is an anti-skid groove, 27 is a clamping groove, 28 is a connecting bolt, and 29 is a cover plate. DETAILED DESCRIPTION

[0028] The present application is not limited by the following examples, and the specific implementation can be determined according to the technical solutions of the present application and the actual situation.

[0029] In the present application, in order to facilitate the description, the relative position relationship of each component is described according to the layout mode of the drawings attached to the specification, such as the position relationship of front, rear, upper, lower, left, right, etc. is determined according to the layout direction of the drawings attached to the specification. Figure 1

[0030] The present application will be further described below in conjunction with the examples and the drawings:

[0031] Example One: as shown in the drawings Figure 1 , 2 ​, 3, the downhole operation non-standard outer diameter tool emergency release device includes a driving assembly, a left clamping assembly, a right clamping assembly 14, and front and rear interval setting front locating seat 1 and rear locating seat 2, and the left clamping assembly and the right clamping assembly 14 are arranged between the front locating seat 1 and the rear locating seat 2, the left clamping assembly and the right clamping assembly 14 can clamp the pipe rod when they are close to each other, and the upper part of the front locating seat 1 is provided with the driving assembly capable of making the left clamping assembly and the right clamping assembly 14 close to or away from each other. In the use process, after the driving assembly acts, the left clamping assembly and the right clamping assembly 14 are close to each other to clamp the pipe string or away from each other to loosen the pipe string, the non-standard outer diameter tool string in the well can be clamped and released, the front locating seat 1 and the rear locating seat 2 can be fixedly installed with the blowout preventer through the setting of the front locating seat 1 and the rear locating seat 2, so that the disassembly and assembly difficulty between the front locating seat 1 and the rear locating seat 2 and the blowout preventer is reduced, and transportation and transfer are facilitated. The present application has the characteristics of reasonable and compact structure, convenient use, safety, labor saving, simplicity and high efficiency.

[0032] The downhole operation non-standard outer diameter tool emergency release device can be further optimized or / and improved according to actual needs:

[0033] Embodiment two: as the optimization of the above-mentioned embodiment, as shown in the accompanying drawings 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 the shape of a Chinese character 'fang' with an opening to the right, the fixed frame is fixedly installed with the left end of the front locating seat 1 on the right side of the front part, the fixed frame is fixedly installed with the left end of the rear locating seat 2 on the right side of the rear part, the left part of the fixed frame is rotatably installed with the left end of the hydraulic cylinder 4 on the inner side, the right end of the piston rod of the hydraulic cylinder 4 is installed with the left part of the left clamping assembly, and the right driving mechanism 3 is the same as and symmetrically arranged with the left driving mechanism. In the use process, the hydraulic cylinder 4 is drivenly connected with the hydraulic system of the workover rig on site, so that the safety and stability of the operation can be improved, a variety of outer diameter pipe strings can be clamped, the left clamping assembly and the right clamping assembly 14 can be flexibly adjusted, and the application range is increased.

[0034] Embodiment three: as the optimization of the above-mentioned embodiment, as shown in the accompanying drawings Figures 1 to 6As shown, the left clamping assembly comprises a support plate 5, a first slip seat 6, a second slip seat 7, a third slip 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 side of the right part of the fixed frame, the front fixed rod 10 and the rear fixed rod 11 are fixedly installed on the upper side of the right part of the support plate 5, the first slip seat 6 and the front fixed rod 10 are rotatably installed together, the second slip seat 7 and the front fixed rod 10 are installed together, the second slip seat 7 and the rear fixed rod 11 are installed together, the third slip seat 8 and the rear fixed rod 11 are rotatably installed together, the front connecting arm 12 is rotatably installed on the front part of the first slip seat 6, the rear connecting arm 13 is rotatably installed on the rear part of the third slip seat 8, the 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 push plate 9 and the right end of the piston rod of the hydraulic cylinder 4 are rotatably installed together at the left side of the middle part of the push plate 9, and the right clamping assembly 14 is the same as the left clamping assembly and is symmetrically arranged. In the use process, through such arrangement, after the left driving mechanism and the right driving mechanism 3 act, the left clamping assembly and the right clamping assembly 14 can simultaneously approach or move away from the pipe column, through the arrangement of the push plate 9, the front connecting arm 12 and the rear connecting arm 13, the actions of the front connecting arm 12 and the rear connecting arm 13 can be synchronized, and the front connecting arm 12, the rear connecting arm 13 and the piston rod of the hydraulic cylinder 4 are convenient to disassemble and assemble.

[0035] Embodiment four: as the optimization of the above-mentioned embodiments, as shown in the accompanying drawings Figure 1 、 2 As shown, the left clamping assembly further comprises a guide rod 15, a guide plate 16 and an elastic reset member 17, the vertical guide plate 16 is fixedly installed on the upper side of the middle part of the support plate 5 corresponding to the position between the push plate 9 and the second slip seat 7, the left and right through guide hole is arranged on the upper left side of the guide plate 16, the guide rod 15 is sleeved in the guide hole and is fixedly installed together with the middle right side of the push plate 9, and the elastic reset member 17 is sleeved 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 requirement, the elastic reset member 17 is a compression spring known in the art, through the arrangement of the guide rod 15, the actions of the front connecting arm 12 and the rear connecting arm 13 can be consistent, so that the pipe column can be clamped or loosened together, and the pipe column is not damaged due to the uneven force caused by the inconsistent actions of the front connecting arm 12 and the rear connecting arm 13, through the arrangement of the elastic reset member 17, after the piston rod of the hydraulic cylinder 4 is retracted, the elastic reset member 17 can make the left clamping assembly and the right clamping assembly 14 quickly separate from each other to complete the release operation, and the sensitivity of the action is improved.

[0036] Embodiment five: as the optimization of the above-mentioned embodiments, as shown in the accompanying drawings Figure 1 、 2As shown in FIGS. 3, the fixed frame includes a fixed plate 18, a front cross tie 19 and a rear cross tie 20. The left end of the upper portion of the front positioning seat 1 and the right end of the front cross tie 19 arranged leftward and rightward are fixedly installed together. The left end of the upper portion of the rear positioning seat 2 and the right end of the rear cross tie 20 arranged parallel to the front cross tie 19 are fixedly installed together. The front portion of the fixed plate 18 and the left end of the front cross tie 19 are fixedly installed together. The rear portion of the fixed plate 18 and the left end of the rear cross tie 20 are fixedly installed together. The middle left side of the fixed plate 18 and the left end of the hydraulic cylinder 4 are rotatably installed together. The upper side of the front portion 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 outside the front cross tie 19. The upper side of the rear portion 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 outside the rear cross tie 20. According to requirements, the lower side of the support plate 5 is located above the lower side of the front positioning seat 1. In the use process, through such an arrangement, after the piston rod of the hydraulic cylinder 4 is retracted, the push plate 9 can be moved leftward, so that the right end of the front connecting arm 12 and the right end of the rear connecting arm 13 swing, and the front end of the first slip seat 6 and the rear end of the third slip seat 8 are swung outward, so as to be away from the right clamping assembly 14 and then loosen the pipe string. 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 are swung inward, so as to be close to the right clamping assembly 14 and then clamp the pipe string. After the left driving mechanism drives the left clamping assembly and the right driving mechanism 3 drives the right clamping assembly 14 to be close to each other and abut against the outside of the pipe string, the front cross tie 19 and the rear cross tie 20 are bent to make the lower side of the support plate 5 abut against the upper flange surface of the blowout preventer, so as to support the pipe string, reduce the load of the tool and prolong the service life.

[0037] Example six: as an optimization of the above-mentioned examples, as shown in the accompanying drawings Figures 1 to 9As shown, the first slip bowl 6, the second slip bowl 7 and the third slip bowl 8 are each provided with a T-shaped installation slot 23 penetrating from top to bottom and being wider on the left and narrower on the right, the upper part of each installation slot 23 is inclined to the left relative to the lower part, each installation slot 23 is slidably provided with a slip dog 25 matched with the installation slot 23, the right side of each slip dog 25 is provided with a plurality of anti-skid grooves 26 spaced apart from top to bottom, the upper right side of the first slip bowl 6, the second slip bowl 7 and the third slip bowl 8 is provided with a sliding hole penetrating from top to bottom and gradually decreasing in inner diameter from top to bottom, the right part of each sliding hole is in communication with the left side of the installation slot 23 at the corresponding position, the center axis of each sliding hole is parallel to the left inner wall of the installation slot 23 at the corresponding position, and each sliding hole is provided with an installation block 24 fixedly installed on the left side of the upper part of the slip dog 25 at the corresponding position. The upper part of each installation slot 23 is inclined to the left relative to the lower part, so that when the installation block 24 slides downward in the installation slot 23, the slip dog 25 can be brought closer to the right, so as to clamp the pipe string, the anti-skid grooves 26 can increase the friction between the slip dog 25 and the pipe string, the installation block 24 facilitates the quick disassembly and assembly of the slip dog 25 and the slip bowl, reduces the maintenance cost, and the inner diameter of the sliding hole gradually decreases from top to bottom, so that a plurality of specifications of the installation block 24 can be selected, so as to clamp the pipe string of various specifications by the slip dog 25, and the slip dog 25 can clamp the pipe string with an outer diameter of 73mm to 140mm when approaching each other.

[0038] Embodiment seven: as an optimization of the above-mentioned embodiments, as shown in the accompanying drawings Figures 1 to 6 As shown, the first slip bowl 6, the second slip bowl 7 and the third slip bowl 8 are the same in structure. In use, through such a design, the manufacturing cost of the slip bowl can be reduced, the interchangeability of the first slip bowl 6, the second slip bowl 7 and the third slip bowl 8 can be improved, and the installation difficulty of the slip bowl can be reduced.

[0039] Embodiment eight: as an optimization of the above-mentioned embodiments, as shown in the accompanying drawings Figure 2 , 3 As shown, the right side of the support plate 5 is provided with a clamping slot 27 penetrating from top to bottom and being wider on the right and narrower on the left. According to requirements, the cross section of the clamping slot 27 is isosceles trapezoidal. In use, through such a design, the pipe string can be guided, and subsequent clamping of the pipe string is facilitated.

[0040] Embodiment nine: as an optimization of the above-mentioned embodiments, as shown in the accompanying drawings Figure 10 , 11As shown, at least two connecting bolts 28 are fixed at the lower side of the front positioning seat 1 and the lower side of the rear positioning seat 2. According to 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 through holes, and the connecting bolts 28 at the lower side of the front positioning seat 1 and the connecting bolts 28 at the lower side of the rear positioning seat 2 are uniformly distributed along the circumference of the blowout preventer flange. Through such a design, the front positioning seat 1, the rear positioning seat 2 and the blowout preventer can be quickly disassembled and assembled, and the action stability of the driving mechanism is improved.

[0041] In the emergency release operation of the perforating gun string, the use process of the embodiment is as follows:

[0042] When the perforating gun string with a length of more than 20 meters is lowered at the operation site, the emergency release device of the non-standard outer diameter tool for downhole operation is installed on the flange of the blowout preventer at the wellhead in advance, the hydraulic cylinder 4 is connected with the hydraulic power source of the workover rig (or an independent hydraulic station is used) and is debugged, so that the work is normal.

[0043] During the lowering of the perforating gun string, when the well blowout precursor is found, the perforating gun string is lowered to the wellhead by using the workover rig, so that the piston rod of the hydraulic cylinder 4 is extended to push the left clamping assembly and the right clamping assembly 14 to approach each other to clamp and suspend the pipe string in the well; the traveling block of the workover rig is lowered to unload the pipe column load borne by the traveling block, the pipe hanger for lifting the pipe column is opened, the traveling block is lifted, the pipe hanger is located above the operator at the wellhead, and the normal operation is not affected; the piston rod of the hydraulic cylinder 4 is retracted, the left clamping assembly and the right clamping assembly 14 are 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 valve blowout preventer and the casing gate are closed, and the well shut-in operation is completed.

[0044] The above technical features constitute the embodiment of the application, which has strong adaptability and implementation effect. According to actual needs, unnecessary technical features can be added or reduced to meet the needs of different situations.

Claims

1. An emergency release device for non-standard outer diameter tools used in downhole 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 arranged at intervals in the front and rear. The left clamping component and the right clamping component are arranged at intervals left and right 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. A driving component that can make the left clamping component and the right clamping component approach or move away from each other is provided on the upper part of the front positioning seat; 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, and 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; 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 on the right side inside the fixed frame. The front fixing rod and the rear fixing rod are fixedly installed at intervals in the front and rear 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 connecting arm is rotatably installed at the front part of the first chuck seat, the rear connecting arm is rotatably installed at the rear part of the third chuck seat. 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 component is the same as that of the left clamping component and is symmetrically arranged; 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 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; T-shaped installation grooves that are vertically through and wider on the left and narrower on the right are provided on the right side of the middle parts of the first chuck seat, the second chuck seat, and the third chuck seat. The upper part of each installation groove is inclined to the left relative to the lower part. A chuck tooth matching the installation groove is slidably installed in each installation groove. A plurality of anti-slip grooves are provided at intervals up and down on the right side of each chuck tooth. Slide holes that are vertically through and have an inner diameter gradually decreasing from top to bottom are provided on the upper side of the right parts of the first chuck seat, the second chuck seat, and the third chuck seat. The right part of each slide hole is connected to the left side of the corresponding installation groove. The central axis of each slide hole is parallel to the inner wall of the left side of the corresponding installation groove. An installation block with its right side fixedly installed with the upper left side of the corresponding chuck tooth is installed in each slide hole.

2. The emergency release device for non-standard outer diameter tools used in downhole operations according to claim 1, characterized in that... The fixed frame includes a fixed plate, a front crossbar, and a rear crossbar. The upper left end of the front positioning seat and the right end of the left-right front crossbar are fixedly installed together. The upper left end of the rear positioning seat and the right end of the rear crossbar, which is parallel to the front crossbar, are fixedly installed together. The front part of the fixed plate and the left end of the front crossbar are fixedly installed together. The rear part of the fixed plate and the left end of the rear crossbar are fixedly installed together. The middle left side of the fixed plate is rotatably installed with the left end of the hydraulic cylinder. A front guide sleeve that is slidably installed on the outside of the front crossbar is fixedly installed on the upper 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 outside of the rear crossbar is fixedly installed on the upper rear rear part of the support plate corresponding to the position behind the rear connecting arm.

3. The emergency release device for non-standard outer diameter tools used in downhole operations according to claim 1, characterized in that... The first, second, and third locking seats have the same structure.

4. The emergency release device for non-standard outer diameter tools used in downhole operations according to claim 1, 2, or 3, characterized in that... The support plate has a clamping groove on the right side that is narrower on the left and wider on the right and runs vertically through it.

5. The emergency release device for non-standard outer diameter tools used in downhole operations according to claim 1, 2, or 3, characterized in that... At least two connecting bolts are fixed at intervals on the lower sides of both the front and rear positioning seats.

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