RU53705U1 - HINGE JOINT EQUIPMENT - Google Patents

Abstract

The utility model relates to the oil and gas industry and, in particular, to the swivel joints used in the composition of casing strings, columns of suspended equipment, pipelines. The swivel connection of the downhole equipment includes concentric nozzles, with an inner nozzle having an outer spherical surface located on the landing part of the nozzle and a rectilinear inner surface, and an outer nozzle with a spherical inner surface and a rectilinear outer surface, the nozzles are connected using a union nut, part of the inner surface which is made spherical, forming together with the spherical surface of the outer pipe a common spherical a radial seal is made between the counter surface of the inner surface of the inner pipe, between the counter spherical surfaces of the inner pipe and the union nut, and between the outer pipe and the union nut. The swivel joint of the downhole equipment is technologically advanced in manufacturing and assembly, wear-resistant and efficient in operation.

Description

The utility model relates to the oil and gas industry and, in particular, to the swivel joints used in the composition of casing strings, columns of suspended equipment, pipelines.

A swivel joint is known as part of a flexible pipe for drilling horizontal wells (A.S. No. 272218, E 21 B 17/00, 06/03/1970, Bull. No. 19), in which the hinges are made with guide bushings and are equipped with cams interacting via springs and spacers with ends of the hinges of the guide bushings. The tightness of this swivel is achieved through the use of a rubber ring, pressed against the sphere by a sleeve and a locking spring ring. The tightness of the connecting part is ensured by the use of another rubber ring.

The disadvantage of this swivel is the placement of seals on the inner wall of the housing, which is not technologically advanced. In addition, the claimed location of the sealing rings during operation of the device leads to squeezing the ring from the sealing surface and depressurization of the device.

A swivel joint is also known, which is part of a flexible pipe string (SU 1760076, Е 21 В 17/00, 17/20, 09/07/1992. Bull No. 33), which is a coupling consisting of two nozzles with cylindrical sections at the ends connected hinged sections, which are made in the form of concentric nozzles with spherical outer and inner surfaces, and a corrugated cylindrical sleeve installed in their cavity, connected by ends to the cylindrical sections of the nozzles, and forming spherical nozzles with the inner surface kov annular cavity.

The overall dimensions of this swivel (the diameter of the spherical surfaces) significantly exceed the diameter of the column, which is undesirable, since it leads to the blocking of the fluid flow channel through the annulus and makes it difficult for the column to pass through the well, the walls of the swivel and the wall of the well quickly wear out, there is a high probability of cavity formation in the trunk. In addition, the design is complex and low-tech to manufacture.

The objective of this utility model is to simplify the design of the joint of the articulated downhole equipment, increase the manufacturability of the manufacture and wear resistance of the articulated joint, and its efficiency.

The problem is solved in that in the connection of the articulated downhole equipment, including concentrically arranged nozzles with spherical surfaces, the inner nozzle is made with an outer spherical surface located on the landing part of the nozzle and a rectilinear inner surface, and the outer nozzle with a spherical inner surface and a rectilinear outer surface, nozzles connected with a union nut, part of the inner surface of which is made spherical, forming together with a spherical With the outer surface of the outer pipe, a common spherical surface corresponding to the outer surface of the inner pipe, radial seals are made between the counter spherical surfaces of the inner pipe and the union nut and between the outer pipe and the union nut.

The utility model is illustrated in the drawing. In FIG. shows the joint articulated downhole equipment, a General view.

The swivel connection of the downhole equipment consists of an external pipe 1 with an internal spherical surface 2, an internal pipe 3 with an external spherical surface 4, a union nut 5, seals 6 and 7.

A column made up of pipes with a swivel joint, when passing through the casing or inside an open bore, assumes an arbitrary position in the channel within the free space inside the channel. In this case, the outer pipe 1 and the union nut 3 with a common spherical surface take up the load, due to which the axial force required to guide the column inside the channel is reduced. Seals 6 and 7 allow you to maintain the tightness of the column when changing the angle between the outer 1 and the inner pipe.

The application of the proposed joint articulated downhole equipment will allow:

- reduce the installation time of the column, due to the simplification of the articulation of the pipes;

- reduce the wear of the walls of the column and channel due to the free passage of the column along the channel and the practical elimination of friction between the walls of the column and channel;

- reduce the energy required to overcome the axial forces arising from the posting of the column in the trunk with a small bending radius.

Claims (1)

Swivel connection of downhole equipment, including concentrically arranged nozzles with spherical surfaces, characterized in that the inner nozzle is made with an outer spherical surface located on the landing part of the nozzle and a rectilinear inner surface, and the outer nozzle is made with a spherical inner surface and a rectilinear outer surface, the nozzles are connected using a union nut, a part of the inner surface of which is made spherical, forming together with a spherical radial seals are made between the counter spherical surfaces of the inner pipe and the union nut and between the outer pipe and the union nut.