CN218882164U

CN218882164U - Cladding sucker rod

Info

Publication number: CN218882164U
Application number: CN202222833671.9U
Authority: CN
Inventors: 朱明瑞; 崔树峰; 毛明涛; 郑芹; 张锐; 李盈锦; 杜东霖; 王虎
Original assignee: Dongying Jiangrun Petroleum Technology Development Co ltd
Current assignee: Dongying Jiangrun Petroleum Technology Development Co ltd
Priority date: 2022-10-27
Filing date: 2022-10-27
Publication date: 2023-04-18
Anticipated expiration: 2032-10-27

Abstract

A coated sucker rod is characterized in that an anti-corrosion pipe is coated on a rod body, a push-receiving head is sleeved from the head of the rod body, the lower part of the push-receiving head reaches the upper part of the anti-corrosion pipe, internal threads on the upper part of the push-receiving head are connected with external threads on the head of the rod body, the lower part of the push-receiving head is extruded to enable a lower inner hole of the push-receiving head to deform and reduce, and then the push-receiving head is extruded on the anti-corrosion pipe.

Description

Cladding sucker rod

Technical Field

The utility model belongs to a sucker rod that oil-well pump and beam-pumping unit are connected and are used in the oil field oil-well is a cladding sucker rod.

Background

In an oil field pumping system, a pumping rod is soaked in well fluid to work, the well fluid contains corrosive media to corrode the pumping rod, so that the service life of a pumping rod string is short, the production cycle of an oil well is short, and the economic benefit is poor. In order to solve the problem, the oil field uses a material type corrosion-resistant sucker rod, but the sucker rod is made of a metal material, has limited corrosion resistance and cannot completely solve the problem of corrosion. China patent 200620086330.8 "an anti-eccentric wear sucker rod", the technical scheme that this patent related to finds that well fluid can get into the abrasionproof pipe in actual use, makes the sucker rod receive the corruption of well fluid, and long-term corruption makes the sucker rod impaired, easily takes place the sucker rod accident of breaking. Therefore, technical personnel also design Chinese patent application 2018103024576 "a cladding sucker rod", so that the sucker rod is not corroded, the service life of a sucker rod column is prolonged, the problem that the connecting thread of the push-and-hold head and the head of the rod body is loosened to buckle the sucker rod column to fall into a well is caused by the fact that the threaded connection of the push-and-hold head and the rod body is not provided with a locking shoulder, and after the connecting thread of the push-and-hold head and the head of the rod body is loosened to buckle the head of the rod body to fall into the well, the production of the oil well is stopped to repair the well, so that great economic loss is generated.

Disclosure of Invention

The utility model aims at designing a cladding sucker rod, overcoming the above-mentioned problem that exists, making its sucker rod noncorrosive, improving the life of sucker rod post, preventing that the sucker rod post from only tripping and falling into the well.

The purpose of the utility model is realized like this: the anti-corrosion pipe comprises a push-receiving head, a left anti-return block, a rod body, an anti-corrosion pipe and a right anti-return block, wherein the rod body is coated with the anti-corrosion pipe, the head part of the rod body is provided with external threads, the diameter of an inner hole at the lower part of the push-receiving head is equal to the diameter of the head part of the rod body, the upper part of the push-receiving head is provided with internal threads, the internal threads at the upper part of the push-receiving head are matched with the external threads at the head part of the rod body, the push-receiving head is sleeved in from the head part of the rod body, the lower part of the push-receiving head reaches the upper part of the anti-corrosion pipe, the internal threads at the upper part of the push-receiving head are connected with the external threads at the head part of the rod body, so that the push-receiving head forms a push-receiving surface at the head part of the rod body, the lower part of the push-receiving head is extruded on the anti-corrosion pipe after the inner hole of the push-receiving head is deformed and reduced, the inner hole is extruded on the anti-corrosion pipe, the rod body, the extrusion force is transmitted to the rod body, so that no gap exists between the anti-corrosion pipe, well liquid can not permeate into the gap between the anti-corrosion pipe, and the anti-corrosion pipe, thereby preventing the anti-corrosion pipe from being corroded by the well liquid, the lower part of the external thread is provided with a stress relief groove, the structure and the size of the left retaining block and the right retaining block are the same, the left retaining block and the right retaining block are folded into a cylinder, the left retaining block and the right retaining block are placed in the stress relief groove, the inner walls of the left retaining block and the right retaining block are tightly attached to the stress relief groove, so that the left retaining block and the right retaining block cannot axially displace in the stress relief groove, the outer diameters of the left retaining block and the right retaining block are equal to the diameter of an inner hole at the lower part of the pushing and receiving head, a left clamping block is punched on the side wall of the left retaining block, the lower part of the left clamping block expands outwards to form the left clamping block into a leaf spring, a right clamping block is punched on the side wall of the right retaining block, the lower part of the right clamping block expands outwards to form the right clamping block into a leaf spring, an inner clamping groove is arranged at the lower part of an inner thread at the upper part of the pushing and receiving head, and the left clamping block, the right clamping block and the clamping block form a leaf spring, and a clamping block, the lower end of the right clamping block is clamped on the lower end face of the inner clamping groove, so that the push-and-receive head cannot be separated after being connected to the rod body.

The utility model has the advantages that: the lower ends of the left clamping block and the right clamping block are clamped on the lower end face of the inner clamping groove, the push-and-hold head is connected to the rod body and cannot be disengaged, the problems in the prior art are solved, the sucker rod cannot be corroded by well fluid, the service life of the sucker rod column can be prolonged, the sucker rod column can be prevented from being disengaged and falling into a well, and remarkable economic benefits are achieved.

Drawings

Fig. 1 is an assembly view of the present invention.

Fig. 2 is a front view of the piece 2 of fig. 1.

Figure 3 is a perspective view of the piece 2 of figure 1.

Fig. 4 is a perspective view of the

parts

2, 5 of fig. 1 after folding.

In fig. 1, the

parts

2 and 5 are in the same pattern.

Detailed Description

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As can be seen from the figure, the embodiment of the utility model comprises a push receiving head 1, a left stopping block 2, a rod body 3, an anticorrosive pipe 4 and a right stopping block 5, the anticorrosive pipe 4 is coated on the rod body 3, the head of the rod body 3 is provided with an external thread 3-1, the diameter of the inner hole at the lower part of the push receiving head 1 is equal to the diameter of the head of the rod body 3, the upper part of the push receiving head 1 is provided with an internal thread, the internal thread at the upper part of the push receiving head 1 is matched with the external thread 3-1 at the head of the rod body 3, the push receiving head 1 is sleeved in from the head of the rod body 3, the lower part of the push receiving head 1 reaches the upper part of the anticorrosive pipe 4, the internal thread at the upper part of the push receiving head 1 is connected with the external thread 3-1 at the head of the rod body 3, the push receiving head 1 forms a push bearing surface 3-3 at the head of the rod body 3, the lower part of the push receiving head 1 is extruded, the lower part of the push receiving head 1 is deformed and reduced in diameter and then extruded on the anticorrosive pipe 4, and the extrusion force is transmitted to the rod body 3, so that the upper part of the anti-corrosion pipe 4 and the rod body 3 have no clearance, the well liquid can not permeate into the clearance between the rod body 3 and the anti-corrosion pipe 4 to prevent the rod body 3 from being corroded by the well liquid, the lower part of the external thread 3-1 is provided with a stress relief groove 3-2, the left retaining block 2 and the right retaining block 5 have the same structure and size, the left retaining block 2 and the right retaining block 5 are folded into a cylinder, the left retaining block 2 and the right retaining block 5 are placed in the stress relief groove 3-2, the inner walls of the left retaining block 2 and the right retaining block 5 are tightly attached to the stress relief groove 3-2, so that the left retaining block 2 and the right retaining block 5 can not axially displace in the stress relief groove 3-2, and the outer diameters of the left retaining block 2 and the right retaining block 5 are equal to the diameter of the lower inner hole of the push receiving head 1 (so that the lower part of the inner hole of the push receiving head 1 can pass through the left retaining block 2 and the right retaining block 2, A right backstop block 5), a left fixture block 2-1 is punched on the side wall of the left backstop block 2, the lower part of the left fixture block 2-1 is expanded outwards to enable the left fixture block 2-1 to become a leaf spring, a right fixture block 5-1 is punched on the side wall of the right backstop block 5, the lower part of the right fixture block 5-1 is expanded outwards to enable the right fixture block 5-1 to become a leaf spring, an inner clamping groove 1-1 is arranged on the lower part of an internal thread on the upper part of a push-receiving head 1, and the lower ends of the left fixture block 2-1 and the right fixture block 5-1 are clamped on the lower end face of the inner clamping groove 1-1, so that the push-receiving head 1 cannot be separated after being connected to a rod body 3.

The left fixture block 2-1 and the right fixture block 5-1 are made to be leaf springs, when the inner hole at the lower part of the pushing and receiving head 1 passes through the left stopping block 2 and the right stopping block 5, the left fixture block 2-1 and the right fixture block 5-1 can contract inwards, after the inner hole at the lower part of the pushing and receiving head 1 passes through the left stopping block 2 and the right stopping block 5, and when the inner clamping groove 1-1 is aligned with the left stopping block 2 and the right stopping block 5, the left fixture block 2-1 and the right fixture block 5-1 rebound to be in a state shown in figure 1.

The utility model discloses still can set up the boss on pushing away the inner wall of accepting the lower part hole of head 1 as to chinese patent application 2018103024576 "a cladding sucker rod", the boss can impress the surface of anticorrosive pipe 4, cohesion between the increase avoids anticorrosive pipe 4 to stretch out and draw back. The structure of the two ends of the sucker rod of the utility model is the same. The pushing surface 5 is used for being connected with a sucker rod coupling to play a role in locking when the sucker rod coupling is lowered into the well, so that the sucker rod coupling can be prevented from tripping and falling into the well.

Claims

1. A cladding sucker rod comprises a push receiving head (1), a left stopping block (2), a rod body (3), an anticorrosive pipe (4) and a right stopping block (5), wherein the rod body (3) is coated with the anticorrosive pipe (4), the head of the rod body (3) is provided with an external thread (3-1), the diameter of an inner hole at the lower part of the push receiving head (1) is equal to the diameter of the head of the rod body (3), the upper part of the push receiving head (1) is provided with an internal thread, the internal thread at the upper part of the push receiving head (1) is matched with the external thread (3-1) at the head of the rod body (3), the push receiving head (1) is sleeved from the head of the rod body (3), and the lower part of the push receiving head (1) reaches the upper part of the anticorrosive pipe (4), the internal thread on the upper part of the push-and-receive head (1) is connected with the external thread (3-1) on the head part of the rod body (3), so that the push-and-receive head (1) forms a push-and-receive surface (3-3) on the head part of the rod body (3), the lower part of the push-and-receive head (1) is extruded, the lower part inner hole of the push-and-receive head (1) is extruded on the anti-corrosion pipe (4) after deforming and reducing the diameter, the extrusion force is transmitted to the rod body (3), no gap is left between the upper part of the anti-corrosion pipe (4) and the rod body (3), well liquid can not permeate into the gap between the rod body (3) and the anti-corrosion pipe (4), and the rod body (3) is prevented from being corroded by the well liquid, the method is characterized in that: the lower part of the external thread (3-1) is provided with a stress relief groove (3-2), the structure and the size of the left retaining block (2) are the same as those of the right retaining block (5), the left retaining block (2) and the right retaining block (5) are folded into a cylinder, the left retaining block (2) and the right retaining block (5) are placed in the stress relief groove (3-2), the inner walls of the left retaining block (2) and the right retaining block (5) are tightly attached to the stress relief groove (3-2), so that the left retaining block (2) and the right retaining block (5) cannot axially displace in the stress relief groove (3-2), the outer diameters of the left stopping block (2) and the right stopping block (5) are equal to the diameter of an inner hole in the lower portion of the pushing and receiving head (1), a left clamping block (2-1) is punched on the side wall of the left stopping block (2), the lower portion of the left clamping block (2-1) expands outwards to enable the left clamping block (2-1) to be a leaf spring, a right clamping block (5-1) is punched on the side wall of the right stopping block (5), the lower portion of the right clamping block (5-1) expands outwards to enable the right clamping block (5-1) to be a leaf spring, an inner clamping groove (1-1) is formed in the lower portion of an inner thread in the upper portion of the pushing and receiving head (1), and the left clamping block (2-1), the lower end of the right clamping block (5-1) is clamped on the lower end surface of the inner clamping groove (1-1), so that the push-and-receive head (1) cannot be separated after being connected to the rod body (3).