Tube string breakout device, sucker rod wrench square clamping mechanism and coupling clamping mechanism

Abstract

The present invention provides a pipe column unbuckling device, a sucker rod wrench square clamping mechanism and a coupling clamping mechanism. The pipe column unbuckling device comprises a main tong body, a back-up tong body and at least one set of supporting components. The main tong body is provided with at least one main tong mounting ear seat, and the back-up tong body is provided with at least one back-up tong mounting ear seat. The supporting component comprises a mounting base, a support rod, a sleeve and an adjusting clamp. The bottom of the support rod is connected to the mounting base. The main tong mounting ear seat, the adjusting clamp, the sleeve and the back-up tong mounting ear seat are sleeved on the support rod in sequence. The supporting component is suitable for adjusting the distance between the main tong body and the back-up tong by replacing adjusting clamps of different thicknesses. The pipe column unbuckling device of the present invention can actively adjust the distance between the main tong and the back-up tong by replacing adjusting clamps of different thicknesses, so that the versatility of the pipe column unbuckling device is improved, and it can be applied to pipe columns of different types and specifications such as sucker rods and oil pipes.

Description

Technical Field

[0001] The present invention relates to the field of oilfield workover equipment, and in particular, to a pipe string make-up and break-out device, a sucker rod wrench square clamping mechanism and a coupling clamping mechanism. Background Art

[0002] In oilfield workover operations, generally, a hydraulic tong device is used to make up and break out threaded pipe string components such as tubing and sucker rods. The commonly used hydraulic tong mainly consists of a master tong and a back-up tong. During operation, the back-up tong is responsible for clamping the pipe string, and the master tong is responsible for holding the pipe string and rotating it clockwise or counterclockwise to achieve the make-up and break-out operations of the pipe string.

[0003] Due to the large differences in the structural forms and external dimensions of the tubing and sucker rods, the clamping positions of the master tong and the back-up tong are different during the make-up and break-out operations. When making up or breaking out the tubing, the back-up tong clamps the lower tubing coupling, and the master tong clamps the upper tubing body as far away from the tubing thread as possible to prevent the upper tubing from being deformed by clamping. The make-up and break-out of the tubing are achieved by rotating the master tong. When making up the sucker rod, in order to ensure that the sucker rod coupling is tightly connected to the upper and lower sucker rods, the master tong should hold the wrench square of the upper sucker rod, and the back-up tong holds the wrench square of the lower sucker rod. When breaking out the sucker rod, the master tong clamps the wrench square of the upper sucker rod, and the back-up tong clamps the cylindrical surface of the sucker rod coupling. The distances between the wrench square of the upper sucker rod, the wrench square of the lower sucker rod and the cylindrical surface of the lower sucker rod coupling are all very small.

[0004] Therefore, the existing hydraulic tong can only be applicable to the make-up and break-out operations of one type of pipe string, such as tubing or sucker rods. In practical applications, if two types of pipe strings, namely tubing and sucker rods, need to be processed, the hydraulic tong needs to be replaced, which is time-consuming and laborious and greatly affects the wellhead operation efficiency. Summary of the Invention

[0005] The problem solved by the present invention is how to reduce the replacement procedure of wellhead operation equipment and improve the operation efficiency.

[0006] To solve the above problems, the present invention provides a pipe string make-up and break-out device, which includes a master tong body, a back-up tong body and at least one set of support components. At least one master tong mounting ear seat is provided on the master tong body, and at least one back-up tong mounting ear seat is provided on the back-up tong body. The support component includes a mounting base, a support rod, a socket piece and an adjusting clamp. The bottom of the support rod is connected to the mounting base. The master tong mounting ear seat, the adjusting clamp, the socket piece and the back-up tong mounting ear seat are sequentially abutted and sleeved on the support rod. The support component is adapted to adjust the distance between the master tong body and the back-up tong by replacing adjusting clamps with different thicknesses.

[0007] Compared with the prior art, the pipe make-up and break-up device of the present invention has an adjustable clamp that can be replaced. By replacing adjustable clamps with different thicknesses, the distance between the master tongs and the back tongs can be actively adjusted, improving the versatility of the pipe make-up and break-up device. It can be applied to different types and specifications of pipes such as sucker rods and tubing, reducing the replacement procedures of wellhead operation equipment and improving the operation efficiency.

[0008] In a preferred or alternative embodiment, the adjustable clamp includes a first clamping ring and a second clamping ring. Connecting ears are respectively provided at both ends of the first clamping ring and the second clamping ring. The connecting ears of the first clamping ring and the connecting ears of the second clamping ring are connected by fasteners, forming a circular hole between the first clamping ring and the second clamping ring. Thus, to replace the adjustable clamp, the first clamping ring and the second clamping ring can be separated to remove the adjustable clamp from the support column without disassembling and assembling the master tongs, which is convenient to operate.

[0009] In a preferred or alternative embodiment, the adjustable clamp includes a clamping portion and an extending portion connected to each other. The clamping portion is adapted to clamp the support rod. The extending portion extends downward along the bottom of the clamping portion. The top surface of the clamping portion abuts against the master tong mounting ear seat, and the bottom surface of the extending portion abuts against the socket member. Thus, the clamping portion is used to clamp the adjustable clamp to the support rod, and the extending portion determines the thickness of the adjustable clamp. Different adjustable clamps have different thicknesses of the extending portion. This structure of the adjustable clamp is reasonably designed, uses less material, and is convenient for processing and production.

[0010] In a preferred or alternative embodiment, the socket member is a spring. Thus, when the pipe make-up and break-up device performs make-up and break-up operations, the distance between the master tongs and the back tongs will change. Since the socket member is a spring, the elastic force of the spring can be used to compensate for the change in the distance between the master tongs and the back tongs caused by pipe make-up and break-up, restoring the distance between the master tongs and the back tongs to the initial distance.

[0011] In a preferred or alternative embodiment, the master tong mounting ear seat is connected to the master tong body by bolts, and the back tong mounting ear seat is connected to the back tong body by bolts. Thus, the master tong mounting ear seat and the back tong mounting ear seat are firmly fixed and can be quickly disassembled, assembled, and replaced.

[0012] In a preferred or alternative embodiment, the support rod is threadedly connected to the mounting base. Thus, the support rod and the mounting base can be quickly connected, and after installation, they are firmly fixed and not easily detached.

[0013] The present invention also provides a clamping mechanism for a sucker rod wrench square, which is adapted to be installed on the above-mentioned pipe make-up and break-up device. The clamping mechanism for a sucker rod wrench square includes four wrench square teeth blocks. The front surface of the wrench square teeth block has a clamping portion, and the front surface of the clamping portion is a V-shaped surface protruding forward. The clamping portions of the four wrench square teeth blocks surround to form a working surface for clamping the sucker rod wrench square.

[0014] Compared with the prior art, the rod wrench square clamping mechanism of the present invention includes four wrench square blocks. The wrench square blocks have novel structures. Each wrench square block has a clamping portion with a V-shaped surface, which is adapted to fit with the surface of the rod wrench square. The clamping portions of the four wrench square blocks surround to form a working surface, clamping the periphery of the rod, and having good clamping stability.

[0015] In a preferred or alternative embodiment, the back surface of the wrench square block has a positioning portion, and a positioning notch is provided on the positioning portion. The positioning notch is adapted to insert a positioning pin to install the wrench square block on the pipe string make-up and break-out device. Thus, the installation structure of the wrench square block is simple, convenient for disassembly and assembly, has good flexibility, is convenient for quickly replacing according to the working requirements of making-up and breaking-out, and this installation structure has good versatility, and the wrench square block can be adapted to hydraulic tongs with various structures.

[0016] The present invention also provides a coupling clamping mechanism, which is adapted to be installed on the above-mentioned pipe string make-up and break-out device. The coupling clamping mechanism includes four coupling blocks. The front surface of the coupling block has a clamping portion, and the front surface of the clamping portion is an arc surface recessed backward. The clamping portions of the four coupling blocks surround to form a working surface for clamping the coupling.

[0017] Compared with the prior art, the coupling clamping mechanism of the invention includes four coupling blocks. The coupling blocks have novel structures. Each coupling block has a clamping portion with an arc surface, which is adapted to fit with the surface of the coupling. The clamping portions of the four coupling blocks surround to form a working surface, clamping the periphery of the coupling, and having good clamping stability.

[0018] In a preferred or alternative embodiment, the back surface of the coupling block has an installation portion, and an installation notch is provided on the installation portion. The installation notch is adapted to insert a positioning pin to install the coupling block on the pipe string make-up and break-out device. Thus, the installation structure of the coupling block is simple, convenient for disassembly and assembly, has good flexibility, is convenient for quickly replacing according to the working requirements of making-up and breaking-out, and this installation structure has good versatility, and the coupling block can be adapted to hydraulic tongs with various structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view of the pipe string make-up and break-out device in the embodiment of the present invention;

[0020] Figure 2 It is the structural diagram of the adjusting clamp in the embodiment of the present invention;

[0021] Figure 3 It is the structural diagram of the wrench square block in the embodiment of the present invention;

[0022] Figure 4 It is the front view of the wrench square block in the embodiment of the present invention;

[0023] Figure 5 This is the rear view of the wrench square thread block in the embodiment of the present invention;

[0024] Figure 6 This is the structural diagram of the coupling thread block in the embodiment of the present invention;

[0025] Figure 7 This is the combined mode diagram of the clamping mechanism during the operation of screwing on the sucker rod in the embodiment of the present invention;

[0026] Figure 8 This is the combined mode diagram of the clamping mechanism during the operation of unscrewing the sucker rod in the embodiment of the present invention.

[0027] Explanation of reference numerals:

[0028] 1 - Main clamp body, 11 - Main clamp mounting ear seat, 2 - Back clamp body, 21 - Back clamp mounting ear seat, 31 - Mounting base, 32 - Support rod, 33 - Socket part, 4 - Adjusting clamp, 41 - Clamping part, 42 - Extension part, 43 - First snap ring, 44 - Second snap ring, 45 - Connecting ear, 46 - Locking bolt, 5 - Wrench square thread block, 51 - Engaging part, 52 - Positioning part, 53 - Positioning notch, 501 - Wrench square thread block a, 502 - Wrench square thread block b, 503 - Wrench square thread block c, 504 - Wrench square thread block d, 505 - Wrench square thread block e, 506 - Wrench square thread block f, 507 - Wrench square thread block g, 508 - Wrench square thread block h, 6 - Coupling thread block, 61 - Clamping part, 62 - Mounting part, 63 - Mounting notch, 601 - Coupling thread block a, 602 - Coupling thread block b, 603 - Coupling thread block c, 604 - Coupling thread block d, 71 - Main clamp jaw plate a, 72 - Main clamp jaw plate b, 73 - Back clamp jaw plate a, 74 - Back clamp jaw plate b, 8 - Sucker rod a, 81 - Wrench square a, 9 - Sucker rod b, 91 - Wrench square b, 92 - Coupling b. Detailed implementation manners

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and illustrated herein can generally be arranged and designed in a variety of different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but is merely representative of selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0031] It should be noted that like reference numerals and letters refer to like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In the drawings of the embodiments of the present invention, a coordinate system XYZ is provided, where the positive direction of the X-axis represents the front, the negative direction of the X-axis represents the rear, the positive direction of the Y-axis represents the right, the negative direction of the Y-axis represents the left, the positive direction of the Z-axis represents the upper, and the negative direction of the Z-axis represents the lower.

[0033] In addition, in the description of the present invention, it should be noted that in the embodiments of the present invention, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0034] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The following will describe in detail some embodiments of the present invention with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0036] Combined Figure 1 and Figure 2 As shown, an embodiment of the present invention is a tubing make-up and break-out device, which includes a master tong body 1, a back-up tong body 2, and a support assembly. The master tong body 1 is disposed above the back-up tong body 2 (the positive direction of the Z-axis in the figure), and the support assembly is used to support and fix the master tong body 1. The back-up tong body 2 is used to clamp the tubing, and the master tong body 1 is used to hold the tubing and rotate it clockwise or counterclockwise, so as to realize the tubing make-up and break-out operation.

[0037] Combined Figure 1As shown in the figure, the main tong body 1 is provided with main tong mounting lugs 11, and the back tong body 2 is provided with back tong mounting lugs 21. The number of the support components, the main tong mounting lugs 11 and the back tong mounting lugs 21 is the same, at least including one. Each support component is connected to one main tong mounting lug 11 and one back tong mounting lug 21 to form a support and fixation structure. In this embodiment, the main tong mounting lugs 11 are respectively arranged on the front and rear sides of the main tong body 1, and the number of the main tong mounting lugs 11 is 3. Correspondingly, the back tong mounting lugs 21 are respectively arranged on the front and rear sides of the back tong body 2, and the number of the back tong mounting lugs 21 is 3, thus forming a stable structure with three-point support.

[0038] The support component includes a mounting base 31, a support rod 32, a socket 33 and an adjusting clamp 4. Taking one group of support structures as an example, the bottom of the support rod 32 is connected to the mounting base 31. The main tong mounting lug 11, the adjusting clamp 4, the socket 33 and the back tong mounting lug 21 are sequentially abutted and sleeved on the support rod 32 from top to bottom (the reverse direction of the Z-axis in the figure). The mounting base 31 is fixed on the ground or other working planes. The bottom surface of the back tong mounting lug 21 abuts against the mounting base 31, the bottom of the socket 33 abuts against the back tong mounting lug 21, the top of the socket 33 abuts against the adjusting clamp 4, and the top of the adjusting clamp 4 abuts against the main tong mounting lug 11. Therefore, the thicknesses of the socket 33 and the adjusting clamp 4 determine the distance between the main tong body 1 and the back tong body 2. In this embodiment, the adjusting clamp 4 of the support component can be replaced. By replacing the adjusting clamps 4 with different thicknesses, the distance between the main tong body 1 and the back tong body 2 can be actively adjusted. Therefore, this pipe string make-and-break device can be applicable to both the make-and-break operation of sucker rods and the make-and-break operation of tubing. It has strong versatility. When making and breaking different types and specifications of pipe strings, there is no need to replace the whole operation equipment at the wellhead. Only the adjusting clamps 4 with different specifications need to be replaced, which improves the operation efficiency.

[0039] The main tong mounting lug 11 is connected to the main tong body 1 by bolts, and the back tong mounting lug 21 is connected to the back tong body 2 by bolts, so that the main tong mounting lug 11 and the back tong mounting lug 21 are firmly fixed and can be quickly disassembled, assembled and replaced. The support rod 32 is threadedly connected to the mounting base 31. The support rod 32 can be quickly installed on the mounting base 31. After installation, it is firmly fixed, not easy to disengage and will not tilt.

[0040] Furthermore, in this embodiment, the socket 33 is a spring. The main tong body 1 presses on the spring, and the spring bears the weight of the main tong body 1. When making and breaking the pipe string, the distance between the main tong body 1 and the back tong body 2 will change, and the spring is compressed by the force. After the make-and-break operation is completed, the deformation of the spring recovers, so that the distance between the main tong body 1 and the back tong body 2 returns to the initial distance.

[0041] Combined with Figure 2As shown, the adjusting clamp 4 includes a clamping portion 41 and an extension portion 42 which are connected. The clamping portion 41 is used to tightly clamp the support rod 32, and the extension portion 42 extends downward along the bottom of the clamping portion 41. After the adjusting clamp 4 is installed, the top surface of the clamping portion 41 abuts against the main clamp mounting ear seat 11, and the bottom surface of the extension portion 42 abuts against the socket member 33. The thicknesses of the clamping portions 41 of the adjusting clamps 4 of each specification are equal, and the thicknesses of the extension portions 42 are different. Thus, the size of the extension portion 42 determines the overall thickness of the adjusting clamp 4, which is convenient for quickly distinguishing the adjusting clamps 4 of different sizes. Moreover, the structure of this adjusting clamp 4 is reasonably designed, uses less material, and is convenient for processing and production.

[0042] Further, the adjusting clamp 4 includes a first clamping ring 43 and a second clamping ring 44, and a circular hole is formed between the first clamping ring 43 and the second clamping ring 44. The first clamping ring 43 and the second clamping ring 44 can be separated from each other. Connection ears 45 are respectively provided at both ends of the first clamping ring 43 and the second clamping ring 44. The connection ear 45 of the first clamping ring 43 and the connection ear 45 of the second clamping ring 44 are connected by a fastener. In this embodiment, the fastener is a locking bolt 46. In other embodiments, the fastener can be structures such as a buckle or a hinge. When replacing the adjusting clamp 4, the first clamping ring 43 and the second clamping ring 44 are separated, and then the adjusting clamp 4 can be removed from the support column without disassembling and assembling the main clamp, which is convenient for operation.

[0043] In the actual application of the pipe string make-up and break-out device of this embodiment, if it is necessary to adjust the distance between the main clamp body 1 and the back clamp body 2 to adapt to different types or different specifications of pipe strings, it is necessary to achieve this by replacing the adjusting clamp 4. If it is necessary to switch from tubing operation to sucker rod operation, it is necessary to reduce the distance between the main clamp body 1 and the back clamp body 2. First, loosen the locking bolt 46 on the adjusting clamp 4, replace the adjusting clamp 4 with a smaller thickness, and then the locking bolt 46 passes through the connection ears 45 of the first clamping ring 43 and the second clamping ring 44 for fastening, and the first clamping ring 43 and the second clamping ring 44 tightly clamp the support column. If it is necessary to switch to different specifications of sucker rods, it is also necessary to replace the adjusting clamps 4 of different specifications. The difference between the adjusting clamps 4 of different specifications lies in the thickness of the extension portion 42, and the adjusting clamps 4 of different thicknesses are matched with different specifications of sucker rods.

[0044] Another embodiment of the present invention is a clamping mechanism for a sucker rod wrench square, which is suitable for being installed on the pipe string make-up and break-out device of the above embodiment, and it includes four wrench square teeth blocks 5. The structure of the wrench square teeth block 5 is as Figures 3 to 5 shown. The front surface of the wrench square teeth block 5 has a clamping portion 51. The front surface of the clamping portion 51 is a V-shaped surface protruding forward. The size and angle of the V-shaped surface are adapted to the sucker rod wrench square. Thus, the surface of the clamping portion 51 can be attached to the surface of the sucker rod wrench square. The clamping portions 51 of the four wrench square teeth blocks 5 surround to form a working surface for clamping the sucker rod wrench square, clamping the periphery of the sucker rod, and can greatly improve the clamping stability of the pipe string make-up and break-out device.

[0045] The back of the wrench square tooth block 5 has a positioning portion 52, and the positioning portion 52 is provided with a positioning notch 53. The positioning notch 53 is suitable for inserting a positioning pin to install the wrench square tooth block 5 on the unbuckling device on the pipe column. The installation structure of the wrench square tooth block 5 is simple, easy to disassemble and assemble, and has good flexibility, which is convenient for rapid replacement according to the work requirements of making and unbuckling. In this embodiment, the positioning portion 52 has two upper and lower positioning notches 53, and the positioning notch 53 is U-shaped. By adjusting the size and position relationship of the positioning notch 53, the wrench square tooth block 5 can be installed on hydraulic pliers of various structures, and the installation is highly universal.

[0046] Another embodiment of the present invention is a coupling clamping mechanism, which is also suitable for being installed on the pipe column breaker device of the above embodiment, and comprises four coupling tooth blocks 6. The structure of the coupling tooth blocks 6 is as follows Figure 6 As shown in FIG. 1 , the front of the coupling tooth block 6 has a clamping portion 61, and the front of the clamping portion 61 is a circular arc surface that is concave backwards. The size of the circular arc surface is adapted to the cylindrical surface of the sucker rod or the oil pipe coupling, so that the surface of the clamping portion 61 can fit the surface of the coupling. The clamping portions 51 of the four coupling tooth blocks 6 are surrounded to form a working surface for clamping the coupling, which clamps the surrounding of the coupling and has good clamping stability.

[0047] The back of the coupling tooth block 6 has a mounting portion 62, and the mounting portion 62 is provided with a mounting notch 63, and the mounting notch 63 is suitable for inserting a positioning pin to mount the coupling tooth block 6 on the pipe column buckling device. The mounting structure of the coupling tooth block 6 is simple, easy to disassemble and assemble, and has good flexibility, which is convenient for rapid replacement according to the work requirements of buckling and buckling. Moreover, this mounting structure has good versatility, and the coupling tooth block can be mounted on hydraulic pliers of various structures by adjusting the size and position relationship of the mounting notch 63.

[0048] The following combination Figure 7 and Figure 8 , explain the usage of the sucker rod wrench square clamping mechanism and the coupling clamping mechanism of the above embodiment.

[0049] When the sucker rod is made up, the clamping mechanism combination is as follows Figure 7 ​​As shown in the figure, two sets of sucker rod wrench square clamping mechanisms need to be used. Specifically, the main jaw plate a71 and the main jaw plate b72 on the main clamp body 1 are arranged oppositely. The wrench square tooth blocks a501 and b502 are installed on the main jaw plate a71. The wrench square tooth blocks a501 and b502 are symmetric structures. The wrench square tooth blocks c503 and d504 are installed on the main jaw plate b72. The wrench square tooth blocks c503 and d504 are symmetric structures. The four V-shaped surfaces of the wrench square tooth blocks a501, b502, c503, and d504 are combined to form a working surface, and a reliable clamping is formed at the wrench square a81 of the sucker rod a8. The back jaw plate a73 and the back jaw plate b74 on the back clamp body 2 are arranged oppositely. The wrench square tooth blocks e505 and f506 are installed on the back jaw plate a73. The wrench square tooth blocks e505 and f506 are symmetric structures. The wrench square tooth blocks g507 and h508 are installed on the back jaw plate b74. The wrench square tooth blocks g507 and h508 are symmetric structures. The four V-shaped surfaces of the wrench square tooth blocks e505, f506, g507, and h508 are combined to form a working surface, and a reliable clamping is formed at the wrench square b91 of the sucker rod b9. Both sets of sucker rod wrench square clamping mechanisms are reliably clamped, and the main clamp body 1 rotates to complete the threading operation of the sucker rod.

[0050] During the unthreading operation of the sucker rod, the combination method of the clamping mechanism is as Figure 8As shown in the figure, a set of sucker rod wrench square clamping mechanisms and a set of coupling clamping mechanisms are required. Specifically, on the main tong body 1, the main tong jaws a71 and the main tong jaws b72 are arranged oppositely. On the main tong jaws a71, the wrench square tooth blocks a501 and the wrench square tooth blocks b502 are installed. The wrench square tooth blocks a501 and the wrench square tooth blocks b502 are symmetric structures. On the main tong jaws b72, the wrench square tooth blocks c503 and the wrench square tooth blocks d504 are installed. The wrench square tooth blocks c503 and the wrench square tooth blocks d504 are symmetric structures. The 4 V-shaped surfaces of the wrench square tooth blocks a501, the wrench square tooth blocks b502, the wrench square tooth blocks c503, and the wrench square tooth blocks d504 form a working surface, and at the wrench square a81 of the sucker rod a8, a reliable clamping is formed. On the back tong body 2, the back tong jaws a73 and the back tong jaws b74 are arranged oppositely. On the back tong jaws a73, the coupling tooth blocks a601 and the coupling tooth blocks b602 are installed. The coupling tooth blocks a601 and the coupling tooth blocks b602 are symmetric structures. On the back tong jaws b74, the coupling tooth blocks c603 and the coupling tooth blocks d604 are installed. The coupling tooth blocks c603 and the coupling tooth blocks d604 are symmetric structures. The 4 arc surfaces of the coupling tooth blocks a601, the coupling tooth blocks b602, the coupling tooth blocks c603, and the coupling tooth blocks d604 form a working surface, and at the coupling b92 of the sucker rod b9, a reliable clamping is formed. Both the sucker rod wrench square clamping mechanism and the coupling clamping mechanism are reliably clamped, and the main tong body 1 rotates to complete the operation of unscrewing the sucker rod.

[0051] In the above embodiments, the structures of the sucker rod wrench square clamping mechanism and the coupling clamping mechanism are novel. The wrench square tooth blocks and the coupling tooth blocks can form a surrounding cooperative clamping, with good clamping stability. The wrench square tooth blocks and the coupling tooth blocks are convenient to disassemble and assemble, and can be quickly replaced, meeting the two working requirements of screwing on and unscrewing the sucker rod.

[0052] In the description of this specification, the descriptions referring to terms such as "embodiment", "one embodiment", and "one implementation manner" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or implementation manner are included in at least one embodiment or implementation manner of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or implementation manner. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or implementation manners in a suitable manner.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A shackle device on a pipe string, characterized in that: The invention comprises a main tong body (1), a back-up tong body (2) and at least one group of supporting components, wherein the main tong body (1) is provided with at least one main tong mounting ear seat (11), the back-up tong body (2) is provided with at least one back-up tong mounting ear seat (21), the supporting component comprises a mounting base (31), a support rod (32), a sleeve (33) and an adjusting clamp (4), the bottom of the support rod (32) is connected to the mounting base (31), the main tong mounting ear seat (11), the adjusting clamp (4), the sleeve (33) and the back-up tong mounting ear seat (21) are sleeved on the support rod (32) in sequence. ), the support assembly is suitable for adjusting the distance between the main caliper body (1) and the backup caliper body (2) by replacing the adjusting clamp (4) of different thicknesses, the adjusting clamp (4) comprises a first clamp ring (43) and a second clamp ring (44), the first clamp ring (43) and the second clamp ring (44) are respectively provided with connecting ears (45) at both ends, the connecting ears (45) of the first clamp ring (43) and the connecting ears (45) of the second clamp ring (44) are connected by fasteners, so that a circular hole is formed between the first clamp ring (43) and the second clamp ring (44), and the sleeve (33) is a spring.

2. The breaker device on the pipe column according to claim 1, characterized in that: The adjusting clamp (4) comprises a connected embracing portion (41) and an extending portion (42), wherein the embracing portion (41) is suitable for clamping the support rod (32), and the extending portion (42) extends downward along the bottom of the embracing portion (41), the top surface of the embracing portion (41) abuts against the main pliers mounting ear seat (11), and the bottom surface of the extending portion (42) abuts against the sleeve (33).

3. The breaker device on a pipe column according to claim 1, characterized in that: The main caliper mounting ear seat (11) is connected to the main caliper body (1) via bolts, and the backup caliper mounting ear seat (21) is connected to the backup caliper body (2) via bolts.

4. The breaker device on a pipe column according to claim 1, characterized in that: The support rod (32) is threadedly connected to the mounting base (31).

5. The pipe string breakout device according to any one of claims 1 to 4, characterized in that: The invention also comprises a sucker rod wrench square clamping mechanism, wherein the sucker rod wrench square clamping mechanism comprises four wrench square tooth blocks (5), the front face of the wrench square tooth block (5) is provided with a clamping portion (51), the front face of the clamping portion (51) is a V-shaped surface protruding forward, and the clamping portions (51) of the four wrench square tooth blocks (5) are combined to form a working surface for clamping the sucker rod wrench square.

6. The pipe string breakout device according to claim 5, characterized in that: The back of the wrench square tooth block (5) is provided with a positioning portion (52), and the positioning portion (52) is provided with a positioning notch (53), and the positioning notch (53) is suitable for inserting a positioning pin to install the wrench square tooth block (5) on the pipe column upper buckle device.

7. The pipe string breakout device according to any one of claims 1 to 4, characterized in that: The invention also comprises a coupling clamping mechanism, wherein the coupling clamping mechanism comprises four coupling tooth blocks (6), the front face of the coupling tooth block (6) is provided with a clamping portion (61), the front face of the clamping portion (61) is a circular arc surface recessed backwards, and the clamping portions (61) of the four coupling tooth blocks (6) are enclosed to form a working surface for clamping the coupling.

8. The breaker device on a pipe column according to claim 7, characterized in that: The back of the coupling tooth block (6) is provided with a mounting portion (62), and the mounting portion (62) is provided with a mounting notch (63), and the mounting notch (63) is suitable for inserting a positioning pin to mount the coupling tooth block (6) on the breaker device on the pipe column.

Images