RU176005U1 - SAFETY ASSEMBLY FOR THREADED CONNECTION OF PUMP AND COMPRESSOR PIPES - Google Patents

Abstract

The utility model relates to the oil industry and can be used to protect the joints of tubing from corrosion. The technical result, which consists in increasing the degree of protection of the end sections of tubing, is achieved due to the fact that between the end sections of the tubing, inside the coupling, a safety element is installed made in the form of two rings interconnected along the side surface by a threaded connection, while the thread on the side surface of one of the rings can be made in two separate diametrically located areas. 3 ill.

Description

The technical field to which the utility model relates.

The utility model relates to the oil industry and can be used to protect the joints of tubing from corrosion.

State of the art

Pipeline connections are known (RF patent No. 5421, class IPC ЕВВ 17/04, date of publication. November 16, 1997, RF patent No. 33969, class. IPC of Е21В 17/02, F16L 13/11, date of publication. November 20, 2003), containing a sleeve connecting the ends of the pipelines with an internal thread and a bolt-on sleeve located in a threaded connection between the sleeve and the ends of the pipes, the sleeve being made of thermoplastic or tromoreactive material. The disadvantage of these designs is the need for rotation during installation of the coupling, which can lead to damage to the thermoplastic layer of the sleeve.

A sleeve threaded pipe joint is known (RF patent 172778, class IPC F16L 15/00, published date July 24, 2017), including a sleeve on the inner surface of which from the ends there are two threaded sections with a smooth locking sealing part between them and two located coaxial to the end of the pipes, on the outer surface of which, starting from the end in the direction of the main body of the pipe, a smooth locking sealing part is arranged sequentially, which comes into contact with a smooth locking sealing part of the coupling, while smooth locking parts pipes and couplings are made in the form of two joined sealing and thrust conical surfaces with different tapers, located on the pipes between the threaded section and the pipe end. The disadvantage of this design is the possibility of a gap between the pipes with the possibility of getting into the region of the end sections of the pipes of a chemically aggressive flow of well products.

The closest analogue to the proposed design of the safety assembly of the threaded connection of tubing is a coupling for connecting pipes (RF patent No. 28906, class IPC F16L 21/00, date publ. 04/20/2003), including a coupling housing made in the form of a cylinder with internal threaded sections and with a smooth section (groove) in the central part of the inner side surface of the coupling, into which a sealing ring of elastic material (rubber, plastic, soft metal) is installed. The disadvantage of this design is the need to regulate the gap between the pipes before they dock with the sealing element, and it is possible to crush the seal when exceeding the compressive force of the sealing element made of elastic material.

Utility Model Essence

The problem the utility model aims to solve is to reduce the likelihood of accidents during oil production associated with breakage of the string due to mechanical failure of the tubing threads.

The technical result of the proposed utility model when used in the oil production process is to increase the degree of protection of the end sections of tubing in order to prevent corrosion of the end part of the tubing and the sleeve, reducing the likelihood of flushing the threaded joint.

The specified technical result is achieved due to the fact that the safety assembly of the threaded connection of tubing includes a sleeve, end sections of tubing and a safety element installed between the end sections of the tubing and made in the form of two rings interconnected along the side surface by a threaded connection, while the thread on the lateral surface of one of the rings can be performed on two separate diametrically located sections.

Brief Description of the Drawings

On aig. 1 shows a safety assembly of a threaded tubing connection. In FIG. 2 shows a section of the outer ring of the safety element. In FIG. 3 shows a section through the inner ring of the safety element.

Utility Model Implementation

The safety assembly of the threaded connection of the tubing includes a cylindrical housing of the coupling 1 with an internal thread, the end parts of the pipes of the tubing 2 and 3, the safety element 4. The internal thread of the coupling can be solid or with a sample in the central part of the inner side surface of the coupling 1.

The safety element 4 is made integral, consisting of an outer ring 5 and an inner ring 6, interconnected in working condition by a threaded connection. The outer side surface 7 of the outer ring 5 is made smooth with a diameter equivalent to the diameter of the inner thread of the coupling 1. The inner side surface of the outer ring 5 is smooth, with two threaded sections 8 small along the circumference and an annular inner protrusion 9 around the entire perimeter of one of the ends of the outer ring 5 .

Most of the outer side surface 10 of the inner ring 6 of the safety element 4 is threaded in height with thread parameters corresponding to the parameters of the threaded sections 8 of the inner surface of the outer ring 5. At one of the ends of the inner ring 6 there is a small ring-shaped outer protrusion 11, in height and outer diameter corresponding to the inner annular protrusion 9 of the outer ring 5.

The safety element 4 is made of heat-resistant plastic that is resistant to aggressive environments and can be used in a wide temperature range.

The work of the safety assembly of the threaded tubing connection is as follows. Before the tubing is lowered into the well, the sleeve 1 is screwed onto the end section of the lower pipe 2. The safety element 4, pre-assembled so that the outer ring 5 is connected by a threaded connection to the inner ring 6, is mounted on the end part of the lower pipe 2 so that either the inner ring the protrusion 9 of the outer ring 5 or the outer annular mouthpiece 11 of the inner ring 6 tightly contacted with the end of the lower pipe 2.

In the upper part of the coupling 1, the end section of the pipe 3 is installed so that its end abuts against the other annular protrusion of the safety element 4. The safety element 4 installed in this way prevents the aggressive flow of well products from coming out, reduces the likelihood of corrosion damage to the outer end of the pipe, and extends the life of the coupler.

Claims (2)

1. A safety assembly of a threaded connection of tubing, including a sleeve, end sections of tubing, an annular safety element, characterized in that the safety element is made in the form of two rings interconnected by a threaded connection on the side surface. 2. The safety assembly of the threaded connection of tubing according to claim 1, characterized in that the thread on the side surface of one of the rings can be made in separate diametrically located sections.

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