Double-clip type back-up wrench with detachable rear cover and piston

Abstract

The utility model discloses a detachable back cover taking piston butt clamp type back-up wrench which comprises a wrench body, two groups of wrench tooth seats are arranged on the inner wall of the wrench body, annular maintenance grooves are formed in the outer surfaces of the two sides of the wrench body, pistons and sealing rings are arranged in the annular maintenance grooves, a plurality of groups of screw grooves are formed in the outer surfaces of the two sides of the wrench body, and the screw grooves are communicated with the two groups of screw grooves. The multiple sets of screw grooves are connected with a rear cover through multiple sets of bolts, and the screw rod is connected with the rear cover through the bolts. When the piston or the sealing ring needs to be replaced, the rear cover can be easily opened to expose the maintenance groove where the piston and the sealing ring are located only by disassembling the multiple sets of bolts, and replacement operation is convenient. The design not only simplifies the maintenance and replacement process, but also reduces the maintenance cost, improves the reliability of the equipment and prolongs the service life of the equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of back wrench of well drilling, specifically to detachable back wrench of piston pair clamp type. BACKGROUND

[0002] In the modern oil drilling field, the top drive device (referred to as "top drive") has become the standard configuration of the drilling rig, which greatly improves the efficiency and safety of drilling operation. The top drive system directly drives the drill pipe to rotate through its built-in motor or hydraulic motor, and integrates torque measurement, rotation control, lifting and drilling, etc. Various functions significantly improve the automation degree and operation efficiency of drilling.

[0003] The traditional top drive back wrench is divided into single direction clamping or front spring clamping, and the single direction clamping in the working state makes the drill pipe deviate and the piston difficult to replace, and the back wrench connection device needs to be replaced frequently. The traditional piston or seal needs to be replaced, and the back wrench needs to be removed as a whole, which affects the efficiency and safety of drilling operation. UTILITY MODEL CONTENT

[0004] (I) Utility model purpose

[0005] Therefore, the purpose of the utility model is to provide a detachable back wrench of piston pair clamp type to solve the problems mentioned in the background.

[0006] (II) Technical scheme

[0007] A detachable back wrench of piston pair clamp type, comprising a wrench body, the inner wall of the wrench body is provided with two groups of wrench tooth seats, and the outer surfaces of the two sides of the wrench body are provided with annular maintenance grooves, the annular maintenance grooves are provided with pistons and sealing rings, and the outer surfaces of the two sides of the wrench body are provided with multiple groups of screw grooves, and the multiple groups of screw grooves are connected with the rear cover through multiple groups of bolts.

[0008] Preferably, the outer surfaces of the two sides of the wrench body are fixedly provided with guide blocks, and one side of the guide block is connected with a magnetic plate.

[0009] Preferably, the two sides of the rear cover are inclined.

[0010] Preferably, the outer surfaces of the upper and lower ends of the rear cover are fixedly provided with guide plates, and the guide plates are fixedly provided with a connecting plate.

[0011] Preferably, one side of the outer surface of the connecting plate is provided with a magnetic groove, and the magnetic groove and the magnetic plate are attracted to each other.

[0012] Preferably, one side of the wrench tooth seat is provided with a triangular groove.

[0013] From the above technical scheme, the present application has the following beneficial effects:

[0014] 1. The utility model discloses a bolt is connected with the back cover. When the piston or the sealing ring needs to be replaced, just dismounts a plurality of groups of bolts, can easily open the back cover, exposes the overhaul groove of piston and sealing ring, and the convenient operation of replacement is carried out. This design not only simplifies the maintenance and replacement process, but also reduces the maintenance cost, improves the reliability and service life of the equipment.

[0015] 2. The utility model discloses a back wrench main body structure through the body of tongs, through the drive of two groups of tongs tooth seat and piston that are arranged internally, realizes the efficient clamping and loosening of drill rod. When needing to clamp the drill rod, the top drive hydraulic system injects hydraulic oil into the piston, and the tongs tooth seat is pushed to stretch forward, and the drill rod is clamped tightly, and it is ensured that it does not rotate in the drilling process. Conversely, when needing to loosen the drill rod, the flow direction of hydraulic oil is changed, and the piston drives the tongs tooth seat to contract, and the clamping force between the tongs tooth and the drill rod gradually reduces, facilitating the drill rod to be taken out or put in. This design not only improves the efficiency of drilling operation, but also ensures the stability of the drill rod in the operation process.

[0016] 3. The utility model discloses the two sides outer surface fixed mounting of body of tongs with the guide plate of back cover two sides cooperation, play the role of guiding. Meanwhile, the magnetic attraction board of one side of guide block and the magnetic groove of the connecting plate between the guide plate of the outer surface of the upper and lower two ends of back cover are adsorbed, realize the preliminary fixation of back cover. This magnetic attraction fixed mode not only simplifies the installation process of back cover, improves the installation efficiency, also reduces the error that can appear in the installation process, ensures the connection strength and stability between back cover and body of tongs. DRAWINGS

[0017] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0018] Figure 2 It is the explosion structure schematic diagram of the utility model;

[0019] Figure 3 It is the utility model Figure 2 The enlarged schematic diagram of A place in the utility model;

[0020] Figure 4 It is the utility model Figure 2 The enlarged schematic diagram of B place in the utility model.

[0021] In the drawing: 1, body of tongs;2, tongs tooth seat;3, back cover;4, bolt;5, guide block;6, guide plate;7, piston;8, screw groove;511, magnetic attraction board;611, connecting plate. DETAILED DESCRIPTION

[0022] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application and uses. It should be understood that throughout the drawings, the same or like reference numerals are used to depict the same or similar components and features. The various drawings merely schematically represent the ideas and principles of embodiments of the present disclosure and do not necessarily depict the specific dimensions of the embodiments of the present disclosure and the ratios thereof. Certain parts in certain drawings can be exaggerated to illustrate the relevant details or structures of the embodiments of the present disclosure.

[0023] Referring to Figures 1-4 An embodiment provided by the utility model discloses a detachable rear cover and piston pair clamp type back wrench,

[0024] A detachable rear cover and piston pair clamp type back wrench, comprising a wrench body 1, two groups of wrench tooth seats 2 are arranged on the inner wall of the wrench body 1, and annular maintenance grooves are formed in the outer surfaces of the two sides of the wrench body 1, wherein pistons 7 and sealing rings are arranged in the annular maintenance grooves, and a plurality of groups of screw grooves 8 are formed in the outer surfaces of the two sides of the wrench body 1, and the plurality of groups of screw grooves 8 are connected with the rear cover 3 through a plurality of groups of bolts 4.

[0025] Further, the outer surfaces of the two sides of the wrench body 1 are fixedly provided with guide blocks 5, and one side of the guide block 5 is connected with a magnetic suction plate 511, the design of the guide block 5 can accurately align the opening of the wrench body 1 during installation, avoiding installation difficulties caused by misalignment, the magnetic suction plate 511 is adsorbed on the magnetic groove on the connecting plate 611, and can provide preliminary fixing before the bolt 4 is completely tightened, preventing the rear cover 3 from slipping or misalignment during installation.

[0026] Further, the two sides of the rear cover 3 are in a slope shape, and the slope-shaped rear cover 3 can reduce the friction between the rear cover 3 and the wrench body 1 during installation, thereby reducing the installation difficulty and the required force.

[0027] Further, the outer surfaces of the upper and lower ends of the rear cover 3 are fixedly provided with guide plates 6, and the connecting plate 611 is fixedly arranged between the guide plates 6, and the guide plates 6 and the guide blocks 5 are matched with each other, so that the rear cover 3 is convenient to install.

[0028] Further, the outer surface of one side of the connecting plate 611 is provided with a magnetic groove, and the magnetic groove and the magnetic suction plate 511 are adsorbed with each other, the magnetic groove on the connecting plate 611 provides an adsorption point for the magnetic suction plate 511, so that the rear cover 3 can be preliminarily fixed during installation.

[0029] Further, one side of the wrench tooth seat 2 is provided with a triangular groove, and the design of the triangular groove can provide better occlusal force and stability when the wrench tooth seat 2 clamps the drill rod, thereby ensuring that the drill rod will not fall off or loosen during drilling due to vibration or torque effect.

[0030] Working principle: the body 1 as the main structure of the back clamp, its main role is to achieve the drill pipe on and off. The body 1 is provided with two sets of jaw seat 2, the two sets of jaw seat 2 through the drive of piston 7 to realize the extension and contraction movement.

[0031] When the drill pipe needs to be clamped, the top drive hydraulic system injects hydraulic oil into the piston 7, drives the piston 7 to move forward, and then pushes the jaw seat 2 to stretch forward, until the jaw on the jaw seat 2 tightly clamps the drill pipe. At this time, the drill pipe is firmly fixed in the body 1, preventing it from rotating during drilling. When the drill pipe needs to be released, the top drive hydraulic system changes the flow direction of the hydraulic oil, so that the piston 7 moves backward, driving the jaw seat 2 to shrink, and the clamping force between the jaw and the drill pipe gradually decreases, until the drill pipe can be easily taken out or put in.

[0032] In order to facilitate the maintenance or replacement of the piston 7 and the sealing ring, the outer surface of the body 1 on both sides is provided with an annular maintenance groove, and the piston 7 and the sealing ring are arranged in the maintenance groove. At the same time, a plurality of screw grooves 8 are provided on both sides of the body 1, which are connected with the rear cover 3 through a plurality of bolts 4. When the piston 7 or the sealing ring needs to be replaced, the rear cover 3 can be easily opened by using tools to disassemble the plurality of bolts 4, exposing the maintenance groove where the piston 7 and the sealing ring are located. At this time, the old piston 7 or the sealing ring can be conveniently taken out, and the new piston 7 or the sealing ring can be installed.

[0033] After the replacement is completed, the rear cover 3 is reinstalled. During the installation process, the slope design on both sides of the rear cover 3 cooperates with the guide block 5 of the body 1, which plays a guiding role. At the same time, the magnetic attraction plate 511 on one side of the guide block 5 is attracted to the magnetic groove on the connecting plate 611 between the guide plates 6 on the upper and lower ends of the outer surface of the rear cover 3, which realizes the preliminary fixation of the rear cover 3. This design not only simplifies the installation process of the rear cover 3, but also improves the accuracy and stability of the installation.

[0034] In order to ensure the accuracy and stability of the rear cover 3 during installation, guide blocks 5 are fixedly installed on the outer surface of both sides of the body 1, which cooperate with the guide plates 6 on both sides of the rear cover 3, playing a guiding role.

[0035] At the same time, the magnetic attraction plate 511 on one side of the guide block 5 is attracted to the magnetic groove on the connecting plate 611, further enhancing the connection strength between the rear cover 3 and the body 1. This magnetic attraction fixing method not only improves the installation efficiency of the rear cover 3, but also reduces the error that may occur during the installation process.

[0036] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A detachable rear cover taking piston pair of clamp type back forceps comprising a forceps body (1), characterized in that: The inner wall of the clamp body (1) is provided with two sets of clamp tooth seats (2), and the outer surfaces of the two sides of the clamp body (1) are provided with annular inspection grooves, the annular inspection grooves are provided with pistons (7) and sealing rings, and the outer surfaces of the two sides of the clamp body (1) are provided with a plurality of screw grooves (8), and the plurality of screw grooves (8) are connected with the rear cover (3) through a plurality of bolts (4).

2. A detachable rear cover take piston pair of back pliers according to claim 1, characterized in that: The outer surfaces of the two sides of the clamp body (1) are fixedly provided with guide blocks (5), and one side of the guide block (5) is connected with a magnetic plate (511).

3. A detachable rear cap take piston pair of back pliers according to claim 1, characterized in that: The two sides of the rear cover (3) are in a slope shape.

4. A rear cover removing piston pair clamping type back pliers according to claim 1, characterized in that: The outer surfaces of the upper and lower ends of the rear cover (3) are fixedly provided with guide plates (6), and the guide plates (6) are fixedly provided with a connecting plate (611) therebetween.

5. A rear cover removing piston pair clamping type back pliers according to claim 4, characterized in that: One side of the outer surface of the connecting plate (611) is provided with a magnetic groove, and the magnetic groove and the magnetic plate (511) are mutually adsorbed.

6. A rear cover removing piston pair clamping type back pliers according to claim 1, characterized in that: One side of the clamp tooth seat (2) is provided with a triangular groove.

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