CN211173971U

CN211173971U - Sucker rod coupling

Info

Publication number: CN211173971U
Application number: CN201921872614.3U
Authority: CN
Inventors: 易鲁川; 赵军; 刘庆
Original assignee: Dongying Huicheng Petroleum Engineering Technology Co ltd
Current assignee: Dongying Huicheng Petroleum Engineering Technology Co ltd
Priority date: 2019-11-02
Filing date: 2019-11-02
Publication date: 2020-08-04
Anticipated expiration: 2029-11-02

Abstract

A sucker rod coupling is characterized in that a sucker rod internal thread is arranged in a main body, pushing surfaces are arranged on two end surfaces of the main body, a sealing ring groove is formed in each pushing surface, a sealing ring is installed in each sealing ring groove, the top of each sealing ring protrudes out of each pushing surface, the height difference between the outermost point of each protruding sealing ring and each pushing surface is 0.1-0.5 mm, a magnetic ring is arranged in each sealing ring and is vulcanized with each magnetic ring into a whole, the main body is made of a metal material capable of being attracted with the corresponding magnet, the magnetic rings are made of the magnets, magnetic force can be generated between the magnetic rings and the main body, the sealing rings cannot be separated from the sealing ring grooves, after an oil pumping rod is connected into a well through a coupling, well fluid cannot enter the connecting thread, the threads cannot be corroded, the connection of the oil pumping rod cannot be failed, the normal oil pumping production of an oil pumping well can be guaranteed, and the magnetic force can be generated, make the sealing washer not deviate from the sealing washer groove in, be convenient for the utility model discloses install at the well head.

Description

Sucker rod coupling

Technical Field

The utility model discloses an oil field is pumped the downhole equipment of usefulness, is the joint of connecting the sucker rod usefulness, specifically is a sucker rod coupling.

Background

The length of the sucker rod is 8-9m, if the underground depth of the matched oil-well pump is 1500m, the number of the sucker rods is 100, and the sucker rods need to be connected by a sucker rod coupling and then are put into the well. The upper end surface and the lower end surface of the prior sucker rod coupling are contacted with the pushing surface of the head of the sucker rod, and the threads are locked by the friction force generated by the contact of the upper end surface and the lower end surface of the prior sucker rod coupling and the pushing surface of the head of the sucker rod, so that the connection between the sucker rods is prevented from being disengaged. Because the threads are connected on site and at the well-descending side, oil sludge exists on site, and the oil sludge easily enters between the upper end surface and the lower end surface of the coupling of the sucker rod and the thrust surface of the head of the sucker rod, well fluid enters into the connecting threads through the thrust surface after the oil well descends, so that the threads are corroded to cause connection failure, the connection of the sucker rod is released, the oil well does not produce oil, and great economic loss is generated.

Disclosure of Invention

The utility model aims at designing a sucker rod coupling, overcoming the problem that above-mentioned exists, in preventing that well fluid from getting into the connecting thread of sucker rod and coupling, avoid taking place the connecting thread inefficacy of sucker rod.

The purpose of the utility model is realized like this: the inner part of the main body is provided with an internal thread of a sucker rod, two end faces of the main body are provided with pushing faces, the pushing faces are provided with sealing ring grooves, sealing rings are arranged in the sealing ring grooves, the sealing rings protrude out of the pushing faces, the height difference between the outermost points of the protruding sealing rings and the pushing faces is 0.1-0.5 mm, magnetic rings are arranged in the sealing rings, the sealing rings and the magnetic rings are vulcanized into a whole, the main body is made of a metal material capable of attracting the magnets, the material of the magnetic rings is magnets, and magnetic force can be generated between the magnetic rings and the main body to enable the sealing rings not to be separated from the sealing ring grooves.

The utility model has the advantages that: the oil pumping pole is connected into by the coupling and is gone into the back in the well under the sucker rod string, and in the well fluid can not get into connecting thread, the screw thread can not take place to corrode, and the connection of sucker rod can not become invalid, guarantees that the oil pumping well can normally pump oil production, can produce magnetic force between magnetic ring and the main part, makes the sealing washer not deviate from the sealing washer groove in, be convenient for the utility model discloses install at the well head.

Drawings

Fig. 1 is a lower half-sectional view of an embodiment of the present invention.

Detailed Description

The following describes an embodiment of the present invention with reference to fig. 1.

As shown in the figure, the inner part of a main body 1 is provided with a sucker rod internal thread 1-1, two end faces of the main body 1 are provided with push-up faces 1-3, the push-up faces 1-3 are provided with sealing ring grooves 1-2, sealing rings 2 are arranged in the sealing ring grooves 1-2, the sealing rings 2 protrude out of the push-up faces 1-3, the height difference between the outermost points of the protruding sealing rings 2 and the push-up faces 1-3 is 0.1mm-0.5mm, a magnetic ring 3 is arranged in the sealing rings 2, the sealing rings 2 and the magnetic ring 3 are vulcanized into a whole, the main body 1 is made of a metal material capable of attracting the magnetic iron, the magnetic ring 3 is made of a magnet, and magnetic force can be generated between the magnetic ring 3 and the main body 1, so that the sealing rings 2 cannot be separated from the sealing ring grooves 1.

The upper part and the lower part of the main body 1 have the same structure, namely the upper end and the lower end of the main body 1 are of symmetrical structures and are provided with pushing surfaces 1-3, sealing ring grooves 1-2 are arranged on the two pushing surfaces 1-3 and are provided with sealing rings 2, and magnetic rings 3 are arranged in the two sealing rings 2.

The technical requirements and the processing requirements of the push bearing surfaces 1-3 are the same as those of two end surfaces of the existing sucker rod coupling.

The sealing ring groove 1-2 is an annular groove. The sealing ring 2 is ring-shaped. The magnetic ring 3 is annular.

Claims

1. The utility model provides a sucker rod coupling, the inside of main part (1) has sucker rod internal thread (1-1), and the both ends face of main part (1) has bearing surface (1-3), characterized by: the push bearing surface (1-3) is provided with a sealing ring groove (1-2), a sealing ring (2) is arranged in the sealing ring groove (1-2), the sealing ring (2) protrudes out of the push bearing surface (1-3), the height difference between the protruding outermost point of the sealing ring (2) and the push bearing surface (1-3) is 0.1mm-0.5mm, a magnetic ring (3) is arranged inside the sealing ring (2), the sealing ring (2) and the magnetic ring (3) are vulcanized into a whole, the main body (1) is made of a metal material capable of attracting the magnet, the magnetic ring (3) is made of a magnet, and magnetic force can be generated between the magnetic ring (3) and the main body (1) to enable the sealing ring (2) not to be separated from the sealing ring groove (1-2).