CN220504970U - Simple type back-up wrench for well repairing top drive - Google Patents

Abstract

The utility model discloses a simple well repairing top drive back-up wrench, which comprises wrench bodies symmetrically arranged, wherein end covers are arranged at two ends of the wrench bodies, a sealed hydraulic cavity is formed between the two ends of the wrench bodies and the end covers, and the hydraulic cavity is internally provided with: the clamp teeth are in sliding connection with the hydraulic cavity, one end of each clamp tooth extends to the outside of the hydraulic cavity, and a damping assembly is further arranged on the inner side face of one end of each clamp tooth; the sealing assembly is arranged at the joint of the clamp teeth and the hydraulic cavity, so that leakage of later hydraulic oil is avoided; a reset spring is also arranged between the clamp teeth and the end cover; through the design of the utility model, the arrangement of the structures such as the piston, the connecting rod and the like is omitted, the structure of the top drive back-up wrench is simplified, the working efficiency is effectively improved in the early-stage assembly and the later-stage maintenance, the clamping force of the designed damping assembly and the top drive back-up wrench is not influenced, the lifting force can be improved, and the defects in the existing structure are overcome.

Description

Simple type back-up wrench for well repairing top drive

Technical Field

The utility model belongs to the technical field of well repair equipment, and particularly relates to a simple well repair top drive back-up wrench.

Background

The drilling of holes from the ground by mechanical equipment or manpower is called drilling, and the back-up wrench is an indispensable component of the top drive driving device and is used for completing the work of connecting and disconnecting the drill rod during the top drive drilling operation, and can directly influence the overall reliability of the top drive.

The utility model discloses a back-up tong is driven on top in the bulletin number CN212201951U, this patent reduces through reset spring and guide block and reveal the use of risk and sealing washer, improves the reliability and the stability of back-up tong, but this back-up tong is driven on top overall structure is complicated, in earlier stage's production processing, consuming time and consuming power, in the workover process simultaneously, once the damage condition appears, dismantle and maintain comparatively loaded down with trivial details also, therefore there is great limitation in the in-service use, has modifiable space.

Disclosure of Invention

The utility model aims to provide a simple type well repairing top drive back-up wrench, which aims to solve the problems that the existing top drive back-up wrench provided in the background art is complex in integral structure and cannot realize simple type assembly and rapid maintenance functions.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a simple and easy formula is repaiied well top and is driven back-up tong, includes the pincers body of symmetry setting the end cover is installed at the both ends of pincers body, be formed with sealed hydraulic pressure chamber between the both ends department of pincers body and the end cover be provided with in the hydraulic pressure chamber:

the clamp teeth are in sliding connection with the hydraulic cavity, one end of each clamp tooth extends to the outside of the hydraulic cavity, and a damping assembly is further arranged on the inner side face of one end of each clamp tooth;

the sealing assembly is arranged at the joint of the clamp teeth and the hydraulic cavity, so that the clamp teeth and the hydraulic cavity are sealed, and leakage of later hydraulic oil is avoided;

and a reset spring is also arranged between the clamp teeth and the end cover.

Preferably, the seal assembly comprises a seal plate fixed on the inner wall of the clamp body, the end part of the clamp tooth is provided with a seal groove for the seal plate to penetrate, the seal plate is connected with the seal groove in a clamping manner, the limit guiding and sealing functions can be realized, a plurality of seal strips are arranged at the area where the seal plate is embedded into the seal groove, and the seal strips are propped against the inner wall of the seal groove, so that the sealing effect is improved.

Preferably, the sealing assembly further comprises a retaining plate which is sleeved on the sealing plate in a sliding manner, the sealing plate is further sleeved with a tight-propping spring, two ends of the tight-propping spring are respectively propped against the inner side end surfaces of the retaining plate and the sealing plate, the retaining plate is propped against the end surfaces of the clamp teeth, and sealing strips are also arranged at the joint of the retaining plate and the sealing plate and the joint of the retaining plate and the clamp teeth end surfaces.

Preferably, the damping component is a supporting block, the supporting block is composed of a base, an elastic piece and a damping block, an arc groove is formed in the inner side face of one end of the clamp tooth, the base is arranged in the arc groove, the damping block is positioned outside one end of the clamp tooth, in clamping, the damping block is contacted with the surface of a structure such as a drill rod and the like, and the elastic piece is adhered between the base and the damping block.

Preferably, the elastic member is a rubber block, and the thickness of the rubber block is equal to that of the base, so that the elastic member needs to be jacked up to be checked and replaced in order to avoid damage caused by large extrusion force.

Preferably, the outer surface of the damping block is uneven, so that friction force in clamping can be increased, and stability is improved; the base is connected with the arc groove through magnetic attraction or adhesion, so that the base is convenient to replace.

Preferably, the end cover is provided with an oil filling hole which is communicated with the hydraulic cavity, hydraulic oil is filled into the oil filling hole, and the clamp teeth are pushed, so that the support of structures such as an external drill rod is realized.

Compared with the prior art, the utility model has the beneficial effects that:

through the design of the utility model, the arrangement of the structures such as the piston, the connecting rod and the like is omitted, the structure of the top drive back-up wrench is simplified, the working efficiency is effectively improved in the early-stage assembly and the later-stage maintenance, the clamping force of the designed damping assembly and the top drive back-up wrench is not influenced, the lifting force can be improved, and the defects in the existing structure are overcome.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an enlarged schematic view of the area A of FIG. 1 in accordance with the present utility model;

fig. 3 is a schematic structural view of the abutment of the present utility model.

In the figure:

100. a clamp body; 101. a sealing plate; 102. a retaining plate; 103. a spring is abutted tightly; 104. a sealing strip;

200. an end cap; 201. a return spring;

300. clamping teeth; 300a, sealing groove; 301. abutting blocks; 301a, a base; 301b, an elastic member; 301c, damping blocks.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 3, the present utility model provides a technical solution: the utility model provides a simple and easy formula is repaiied well top and is driven back-up tong, includes the pincers body 100 that the symmetry set up, installs end cover 200 at the both ends of pincers body 100, is formed with sealed hydraulic pressure chamber between the both ends department of pincers body 100 and end cover 200, is provided with in the hydraulic pressure chamber:

the clamp teeth 300 are in sliding connection with the hydraulic cavity, one end of each clamp tooth 300 extends to the outside of the hydraulic cavity, clamping limit of structures such as an external drill rod is achieved, the arrangement of structures such as a piston and a connecting rod is omitted, the whole structure is simple, machining production and later maintenance are convenient, and a damping assembly is further arranged at the inner side face of one end of each clamp tooth 300;

the sealing component is arranged at the joint of the clamp tooth 300 and the hydraulic cavity, so that the clamp tooth 300 and the hydraulic cavity are sealed, and leakage of later hydraulic oil is avoided;

a return spring 201 is further installed between the clamp teeth 300 and the end cap 200, and when hydraulic oil is discharged, that is, when the clamping of the drill rod and other structures is not needed, the return spring 201 pulls the clamp teeth 300 back to the original position through resilience, and when hydraulic oil is injected, the return spring 201 is stretched and generates resilience force, and the resilience force can provide elasticity for the return of the later clamp teeth 300.

In this embodiment, preferably, the sealing assembly includes a sealing plate 101 fixed on the inner wall of the clamp body 100, the end portion of the clamp tooth 300 is provided with a sealing groove 300a through which the sealing plate 101 penetrates, the sealing plate 101 is connected with the sealing groove 300a in a clamping manner, so that the functions of limiting guiding and sealing can be realized, a plurality of sealing strips 104 are arranged at the region where the sealing plate 101 is embedded into the sealing groove 300a, and the sealing strips 104 are abutted against the inner wall of the sealing groove 300a, so that the sealing effect is improved.

In this embodiment, preferably, the sealing assembly further includes a retaining plate 102 slidably sleeved on the sealing plate 101, the sealing plate 101 is further sleeved with a retaining spring 103, two ends of the retaining spring 103 respectively abut against the retaining plate 102 and an inner side end face of the sealing plate 101, the retaining plate 102 abuts against an end face of the clamp tooth 300, and a sealing strip 104 is also disposed at a connection position between the retaining plate 102 and the sealing plate 101 and a connection position between the retaining plate 102 and the clamp tooth 300 end face, and when the retaining plate 102 is moved towards the clamp tooth 300 by elasticity of the retaining spring 103 and abuts against the clamp tooth 300, further sealing can be achieved, thereby avoiding leakage of hydraulic oil.

In this embodiment, preferably, the damping component is a supporting block 301, the supporting block 301 is composed of a base 301a, an elastic member 301b and a damping block 301c, an arc groove is formed on an inner side surface of one end of the clamp tooth 300, the base 301a is disposed in the arc groove, the damping block 301c is located outside one end of the clamp tooth 300, in the clamping process, the damping block 301c contacts with a surface of a structure such as a drill rod, and the elastic member 301b is adhered between the base 301a and the damping block 301c, in the clamping process, the damping block 301c receives a pressing force and acts on the elastic member 301b, and a rebound phenomenon occurs on the elastic member 301b, so that the damping block 301c can be more tightly adhered to the structure such as the drill rod.

In this embodiment, the elastic member 301b is preferably a rubber block, and the thickness of the rubber block is equal to that of the base 301a, so that the elastic member 301b needs to be lifted up to be inspected and replaced in order to avoid damage caused by a large pressing force applied to the elastic member 301 b.

In this embodiment, preferably, the outer surface of the damping block 301c is uneven, so that friction force during clamping can be increased, and stability is improved; the base 301a is magnetically or adhesively connected to the arc slot to facilitate replacement.

In this embodiment, preferably, the end cap 200 is provided with an oil filling hole, which is communicated with the hydraulic cavity, and the hydraulic oil is filled through the oil filling hole and pushes the clamp teeth 300, so as to support the structures such as the external drill rod.

Although embodiments of the present utility model have been shown and described in detail with reference to the foregoing detailed description, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a simple and easy formula is repaiied well top and is driven back-up tong, includes the pincers body (100) of symmetry setting end cover (200), its characterized in that are installed at the both ends of pincers body (100): a sealed hydraulic cavity is formed between the two ends of the clamp body (100) and the end cover (200), and the hydraulic cavity is internally provided with:

the clamp teeth (300) are in sliding connection with the hydraulic cavity, one end of each clamp tooth (300) extends to the outside of the hydraulic cavity, and a damping assembly is further arranged on the inner side surface of one end of each clamp tooth (300);

the sealing assembly is arranged at the joint of the clamp teeth (300) and the hydraulic cavity;

and a return spring (201) is also arranged between the clamp teeth (300) and the end cover (200).

2. The simplified top drive back-up wrench for well workover of claim 1, wherein: seal assembly is including fixing sealing plate (101) at the inner wall of clamp body (100), seal groove (300 a) that supply sealing plate (101) to run through are seted up to the tip of clamp tooth (300), the regional department of sealing plate (101) embedding seal groove (300 a) is provided with a plurality of sealing strips (104), and this sealing strip (104) offsets with the inner wall of seal groove (300 a).

3. The simplified top drive back-up wrench for well workover of claim 2, wherein: the sealing assembly further comprises a retaining plate (102) which is sleeved on the sealing plate (101) in a sliding manner, the sealing plate (101) is further sleeved with a tight-supporting spring (103), two ends of the tight-supporting spring (103) are respectively abutted against the retaining plate (102) and the inner side end face of the sealing plate (101), the retaining plate (102) is abutted against the end face of the clamp tooth (300), and sealing strips (104) are also arranged at the joint of the retaining plate (102) and the sealing plate (101) and the joint of the retaining plate (102) and the clamp tooth (300).

4. The simplified top drive back-up wrench for well workover of claim 1, wherein: the damping assembly is a supporting block (301), the supporting block (301) is composed of a base (301 a), an elastic piece (301 b) and a damping block (301 c), an arc groove is formed in the inner side face of one end of the clamp tooth (300), the base (301 a) is arranged in the arc groove, the damping block (301 c) is located outside one end of the clamp tooth (300), and the elastic piece (301 b) is adhered between the base (301 a) and the damping block (301 c).

5. The simplified well servicing top drive back-up wrench of claim 4, wherein: the elastic piece (301 b) is a rubber block, and the thickness of the rubber block is equal to that of the base (301 a).

6. The simplified well servicing top drive back-up wrench of claim 4, wherein: the outer surface of the damping block (301 c) is uneven; the base (301 a) is connected with the arc groove through magnetic attraction or adhesion.

7. The simplified top drive back-up wrench for well workover of claim 1, wherein: and the end cover (200) is provided with an oil filling hole which is communicated with the hydraulic cavity.