CN215907782U

CN215907782U - Anti-eccentric wear and anti-corrosion sucker rod coupling

Info

Publication number: CN215907782U
Application number: CN202122614021.0U
Authority: CN
Inventors: 王学林; 刘长青; 陈辉; 李凤国
Original assignee: Bazhou Yajie Petroleum Technology Co ltd
Current assignee: Bazhou Yajie Petroleum Technology Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-02-25
Anticipated expiration: 2031-10-28

Abstract

The utility model discloses an anti-eccentric wear and anti-corrosion sucker rod coupling which comprises a coupling, wherein a sucker rod is inserted into the coupling, a limiting block is arranged in the middle of the coupling, a sucker rod pipe is arranged in contact with the limiting block, first threads are arranged on the inner wall of the coupling, second threads in threaded butt joint with the first threads are arranged on the sucker rod, a contact layer wraps the outer wall of the coupling, and the coupling sequentially comprises a base layer, an anti-corrosion layer, an anti-wear layer and an outer layer. The coupling can be in contact with an oil pipe through the contact layer, the wear-resisting effect can be improved through the contact layer made of the titanium alloy material, the corrosion-resisting layer and the wear-resisting layer are adopted for corrosion-resisting and eccentric wear-resisting protection, the service life can be greatly prolonged, and frequent maintenance is avoided.

Description

Anti-eccentric wear and anti-corrosion sucker rod coupling

Technical Field

The utility model relates to the technical field of oil exploitation, in particular to an anti-eccentric wear and anti-corrosion sucker rod coupling.

Background

The sucker rod is a slender rod piece of the pumping well, and is connected with a polished rod at the upper part and an oil well pump at the lower part to play a role in transmitting power.

The length of each sucker rod is 7.62 meters, 8 meters and 9.14 meters, the material is generally low carbon alloy steel, the low carbon alloy steel is subjected to quenching and tempering, the low carbon alloy steel is connected with one another by internal threads in an oil pipe and extends to a piston at an underground oil layer, and oil is pumped by reciprocating motion.

However, when a common coupling is used for a long time, the surface of the coupling is corroded and uneven, the coupling is contacted with the inner wall of an oil pipe, and the condition of eccentric wear is easy to occur due to continuous friction.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an anti-eccentric wear and anti-corrosion sucker rod coupling, which aims to solve the problem of improving the corrosion resistance of the coupling.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides an anti-eccentric anti-corrosion sucker rod coupling, includes the coupling, the sucker rod has been inserted in the coupling, the middle part position of coupling is provided with the stopper, oil pumping pipe and stopper contact setting, be provided with first screw thread on the inner wall of coupling, be provided with the second screw thread with the mutual screw thread butt joint of first screw thread on the sucker rod, the parcel has the contact layer on the outer wall of coupling, the coupling has basic unit, corrosion resistant layer and wearing layer and skin to constitute in proper order.

Preferably, the quantity of stopper is two at least, and evenly distributed sets up, can guarantee that the butt joint position of sucker rod and coupling is stable.

Preferably, the contact layer is made of a titanium alloy material, so that when the contact layer is in contact with the inner wall of the oil pipe, the uneven condition caused by low wear resistance and the contact of the uneven condition are avoided, and the wear consumption is easily caused.

Preferably, the base layer is made of stainless steel materials, and the stainless steel materials have good corrosion resistance and guarantee the structural strength.

Preferably, the corrosion-resistant layer is made of a polypropylene material, so that the corrosion resistance of oil-water stains to the base layer can be improved.

Preferably, the wear-resistant layer is made of polyvinyl chloride materials, so that the wear resistance can be improved, and eccentric wear can be prevented.

Preferably, the outer layer is painted with paint, so that the inner layer can be protected during transportation and installation.

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

1. according to the utility model, the contact layer can be in contact with the oil pipe, and the contact layer made of the titanium alloy material can improve the wear-resisting effect.

2. The coupling disclosed by the utility model adopts the corrosion-resistant layer and the wear-resistant layer for corrosion and eccentric wear protection, so that the service life can be greatly prolonged, and frequent overhaul is avoided.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the collar structure of the present invention.

In the figure: 1. a coupling; 11. a sucker rod; 12. a limiting block; 13. a first thread; 14. a second thread; 15. a contact layer; 2. a base layer; 21. a corrosion-resistant layer; 22. a wear layer; 23. and (4) an outer layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example I

Referring to fig. 1, the anti-eccentric wear and anti-corrosion sucker rod coupling comprises a coupling 1, a sucker rod 11 is inserted into the coupling 1, a limit block 12 is arranged in the middle of the coupling 1, the sucker rod 11 is in contact with the limit block 12, first threads 13 are arranged on the inner wall of the coupling 1, second threads 14 in threaded butt joint with the first threads 13 are arranged on the sucker rod 11, a contact layer 15 wraps the outer wall of the coupling 1, and the coupling 1 is sequentially composed of a base layer 2, an anti-corrosion layer 21, an anti-wear layer 22 and an outer layer 23.

Referring to fig. 1, the number of the limiting blocks 12 is at least two, and the limiting blocks are uniformly distributed, so that the stable butt joint position of the sucker rod 11 and the coupling 1 can be ensured.

This embodiment is used: the limiting block 12 can limit the sucker rod 11 to be inserted into the position, and the situation that the butting depth is different when the two rod pieces are butted is avoided.

Example II

Referring to fig. 1, the embodiment further illustrates an anti-eccentric wear and anti-corrosion coupling for a sucker rod in embodiment 1, which includes a coupling 1, a sucker rod 11 inserted into the coupling 1, a stopper 12 disposed at a middle position of the coupling 1, the sucker rod 11 contacting the stopper 12, a first thread 13 disposed on an inner wall of the coupling 1, a second thread 14 disposed on the sucker rod 11 and in threaded engagement with the first thread 13, a contact layer 15 wrapped on an outer wall of the coupling 1, and the coupling 1 sequentially including a base layer 2, an anti-corrosion layer 21, an anti-wear layer 22, and an outer layer 23.

Referring to fig. 1, the contact layer 15 is made of a titanium alloy material, and can avoid the uneven condition caused by low wear resistance when contacting the inner wall of the oil pipe, and the uneven contact is easy to cause wear consumption.

This embodiment is used: the contact layer 15 made of high-strength material can avoid the condition that the surface is uneven due to abrasion when the contact layer is in contact with an oil pipe (because impurities exist in oil, if the material strength is not high, loss can be caused).

Example III

Referring to fig. 1 and 2, the present embodiment further illustrates another embodiment, an anti-eccentric wear and anti-corrosion coupling for a sucker rod includes a coupling 1, a sucker rod 11 is inserted into the coupling 1, a stopper 12 is disposed at a middle position of the coupling 1, the sucker rod 11 is in contact with the stopper 12, a first thread 13 is disposed on an inner wall of the coupling 1, a second thread 14 in thread butt joint with the first thread 13 is disposed on the sucker rod 11, a contact layer 15 is wrapped on an outer wall of the coupling 1, and the coupling 1 is sequentially composed of a base layer 2, an anti-corrosion layer 21, an anti-wear layer 22, and an outer layer 23.

Referring to fig. 2, the base layer 2 is made of a stainless steel material, and the stainless steel material itself has a good corrosion resistance and ensures a structural strength.

Referring to fig. 2, the corrosion-resistant layer 21 is made of polypropylene, which can improve the corrosion resistance of oil-water stains to the base layer 2.

Referring to fig. 2, the wear-resistant layer 22 is made of polyvinyl chloride, which can improve wear resistance and prevent eccentric wear.

Referring to fig. 2, the outer layer 23 is painted with paint to protect the inner layer during transportation and installation.

This embodiment is used: the corrosion resistance and the abrasion resistance of the coupling 1 body can be improved through the corrosion-resistant layer 21 and the abrasion-resistant layer 22, and the service durability of the body is improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments 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

1. The utility model provides an anti-eccentric wear anticorrosion sucker rod coupling, includes coupling (1), its characterized in that: insert sucker rod (11) in coupling (1), the middle part position of coupling (1) is provided with stopper (12), sucker rod (11) and stopper (12) contact setting, be provided with first screw thread (13) on the inner wall of coupling (1), be provided with on sucker rod (11) with second screw thread (14) of the mutual screw thread butt joint of first screw thread (13), the parcel has contact layer (15) on the outer wall of coupling (1), coupling (1) has basic unit (2), corrosion resistant layer (21) and wearing layer (22) and skin (23) to constitute in proper order.

2. The anti-eccentric wear anti-corrosion sucker rod coupling of claim 1, which is characterized in that: the number of the limiting blocks (12) is at least two, and the limiting blocks are uniformly distributed.

3. The anti-eccentric wear anti-corrosion sucker rod coupling of claim 1, which is characterized in that: the contact layer (15) is made of a titanium alloy material.

4. The anti-eccentric wear anti-corrosion sucker rod coupling of claim 1, which is characterized in that: the base layer (2) is made of stainless steel materials.

5. The anti-eccentric wear anti-corrosion sucker rod coupling of claim 1, which is characterized in that: the corrosion-resistant layer (21) is made of a polypropylene material.

6. The anti-eccentric wear anti-corrosion sucker rod coupling of claim 1, which is characterized in that: the wear layer (22) is made of a polyvinyl chloride material.

7. The anti-eccentric wear anti-corrosion sucker rod coupling of claim 1, which is characterized in that: the outer layer (23) is formed by painting paint.