RU2551134C2 - Releasable leak-tight electric connector of wet contact type for electric connection of cable line in conductive medium - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: releasable leak-tight electric connector of wet contact type is intended for electric connection of cable line in conductive medium. The connector consists of lower and upper parts; the upper part consist of a body, bellows with chamber filled with insulating fluid, contact group with required number of contacts, which is connected to a cable line by means of geophysical head and protective housing with pull-back spring and two-piece gripper, at that the two-piece gripper is placed in lower part of the body and cavity of the gripper is filled with insulating fluid. Lower part of the connector consists of the body with groove for two-piece gripper, wherein a block of contact rings is placed and the latter connect with a cable line by means of geophysical head, bellows with chamber filled with insulating fluid, protective housing leak-tight pressed by a spring and a rod with a groove for two-piece gripper. Sealing elements are installed between protective leak-tight housings and bodies of the upper and lower parts of the connector.

EFFECT: improving reliability of both electrical and mechanical leak-tight connection of the line, including connection at dual completion of oil wells.

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Description

The invention relates to electrical engineering and can be used to connect an electrical line during the operation of oil wells to connect electrical valves and sensors for monitoring reservoir operation and well control during simultaneous and separate and alternate operation of several reservoirs and interlayers and management of “smart wells”, and in other cases where an electrical line connection is required in a conductive medium. Known sealed electrical connector (analog) [1] (copyright certificate No. 2320850, published 1980.30.12).

The connector contains a plug with pin contacts located in the insulator, and a centering sleeve telescopically covering the socket, with sockets, the internal cavity of which is filled with insulating liquid and closed on the articulation side by an elastic diaphragm, the mutual fixing of the plug and the socket, Angular orientation elements in the form of a longitudinal groove and a finger located therein, made in a centering sleeve and in one of the connector parts, and a current lead. which is equipped with a cylindrical part having a weight that provides piercing of the diaphragm with pins, a socket is fixed on one end of the socket, the latter is connected to the current lead, placed on a part of the length in the cylindrical part, the mutual fixation unit is made in the form of a motionless mount on the free portion of the current lead from the side opposite to the socket , a sleeve on which a pair of one-arm levers pivotally connected to two-arm levers, one ends of which are interconnected by a spring and the other interact m with an annular protrusion formed on the inner surface of the centering sleeve, wherein the slot has a lead-in portion and is formed on the cylindrical member, and a finger in the centering sleeve, wherein the insulating fluid has a density lower than the density of the washing fluid, and the plug insulator is made of a hydrophobic material. The disadvantages of this solution are the possibility of penetration of the borehole fluid into the internal cavity of the connector, which leads to disruption of the contact of the connected parts of the connector, the inability to reconnect. Known cable connector (analog) [2] (US Patent No. 4570709, published in 1986), containing a housing consisting of two parts (pin and socket), in which the contact elements are placed. Contact elements are made in the form of metal pins, with mechanical connection providing electrical contact. The socket part of the connector is part of the body of the geophysical instrument, lowered into the well on drill pipes. In the process, the pin part of the connector is lowered into the well through the drill pipe on the wireline. When connecting both parts of the connector, the electrical contacts are connected, providing electrical power to the blocks of the geophysical instrument and the passage of information from it through the wireline cable to the surface.

The disadvantage of this connector is the possibility of penetration of the borehole fluid into the internal cavity of the connector, which leads to disruption of the contact of the connected parts of the connector.

Known cable connector for working in a conductive medium (prototype) [3] (RF Patent 2260231 C1, published September 10, 2005), consisting of pin and female parts with contact elements inside them and a membrane, characterized in that the female part is made in the form of a cylindrical case, the internal cavity of which is made stepwise, with contacts made in the form of elastic split rings fixed on flexible traverses, an elastic membrane located on the side of the joint with the pin part, and a spring-loaded sealing ring, mouth mounted in the housing with the ability to move, and the inner cavity of the nest part is filled with insulating fluid, the pin part is made cylindrical with a conical end, and the diameter of the cylindrical part of the pin is larger than the inner diameter of the sealing ring.

The disadvantages of this cable connector are the insecurity of the pin from the effects of well fluid, the lack of mechanical fixation of the connection, the limited scope, the inability to use in production wells.

The objective of the invention is to increase the unification of the fields of application of a sealed electrical connector of electric lines in conductive media, the implementation of reliable both electrical and mechanical connections, the possibility of using to connect an electric line during simultaneous and separate operation of wells.

This goal is achieved by the fact that the detachable sealed electrical connector type "wet contact" is made of two parts - the upper and lower.

In FIG. 1 shows the design of a detachable sealed electrical connector of the type of "wet contact".

The upper part of the detachable sealed electrical connector of the wet contact type consists of a housing 5, a bellows or a rubber or piston compensator 2 with a chamber 3 filled with insulating liquid, a contact group 6 with the required number of contacts, which is connected to the cable line using a geophysical instrument head or sealed electrical inputs 1, a sealed protective casing 7 with a return spring 4 and a collet gripper 8. In the lower part of the housing have a gripping collet 9, the cavity of which filled with electrical insulating grease.

The lower part of the detachable sealed electrical connector of the wet contact type consists of a sealed housing 14 with a groove for a collet gripper 15, in which a block of slip rings 11 with the required number of slip rings, which are connected to the cable line using a geophysical instrument head or sealed electrical inputs, is located 18 and a bellows or rubber or piston compensator 17 with a chamber 16 filled with electrical insulating liquid, a protective sealed casing 12, pressed by means of a spring 13, rod 10 with a groove for grip. To protect against penetration of the borehole fluid between the protective sealed enclosures and the cases of the upper and lower parts of the detachable sealed electrical connector of the wet contact type, sealing elements are installed.

During the joining, the insulating grease located in the collet cavity of the upper part of the “wet contact” displaces the well fluid between the two parts of the detachable sealed electrical connector of the “wet contact” type, the upper part of the rod 10 of the lower part of the “wet contact” is captured by the collet 8 of the upper part of the detachable sealed electrical connector type wet contact, and there is a mechanical coupling of the upper and lower parts of the detachable sealed electrical connector type wet contact ntact. " Next, the protective sealed casing 12 of the lower part of the detachable sealed electrical connector of the wet contact type moves downward and the protective sealed casing 7 of the upper part of the detachable sealed electrical connector of the wet contact type moves upward. Moreover, in the upper part of the detachable sealed electrical connector of the wet contact type, the insulating fluid flows into the bellows or rubber or piston compensator 2, and in the lower part of the detachable sealed electric connector of the wet contact type into the bellows or rubber or piston compensator 17 . When reaching the bottom, extreme point and engagement of the collet 9 with the groove 15 of the housing 14, the electrical contacts are closed. If necessary, undocking for lifting the equipment for repair, the operation of the mechanism of the detachable sealed electrical connector type "wet contact" occurs in the reverse order. First, the collet 9 is undocked, while the rod 10 remains gripped by the collet 8, the protective tight casing 12 of the lower part of the “wet contact” under the action of the spring 13 moves upward, closing the contact rings 11, and the protective tight casing 7 of the upper part of the detachable sealed electrical connector according to the type wet contact ”under the action of the spring 4 and collet grab 8 moves down, closing the contacts 6. In this case, the insulating liquid from the bellows or rubber or piston compensators 2 and 17 flows into the chambers 3 and 16. Upon reaching the initial state of the upper and lower parts of the detachable sealed electrical connector of the wet contact type and further lifting, the collet grip is disconnected 8. The contact groups of the upper and lower parts of the detachable sealed electrical connector of the wet contact type are protected from ingress of well fluid and are ready to reuse.

Technological and technical results when using a sealed electrical connector of the wet contact type are achieved due to the possibility of connecting the electric line in a conductive medium, including in wells with simultaneous and separate production, as well as due to the possibility of reconnection and connection.

The economic effect of the use of the invention can be achieved by accelerating the repair and maintenance work, since it is possible to disconnect only part of the equipment.

References

1. Copyright certificate No. 2320850, published 1980.30.12.

2. US patent No. 4570709, published in 1986

3. RF patent 2260231 C1, published September 10, 2005.

Claims (1)

A detachable sealed electrical connector of the wet contact type for electrical connection of the cable line in a conductive medium, characterized in that the detachable sealed electrical connector of the wet contact type is made of two parts - the upper and lower, and the upper part of the detachable sealed electrical connector “wet contact” type consists of a housing, a bellows with a chamber filled with an insulating liquid, a contact group with the required number of contacts, which they are connected to the cable line using a geophysical instrument head, a protective tight casing with a return spring and a collet gripper, a gripping collet is located in the lower part of the body, the cavity of which is filled with electrical insulating lubricant, and the lower part of the detachable sealed electrical connector of the wet contact type consists of a sealed housing with a groove for collet gripping, in which the block of slip rings is located, with the required number of slip rings that connect to the cable line with using a geophysical instrument head, a bellows with a chamber filled with electrical insulating fluid, a protective tight casing pressed by a spring, a rod with a groove for collet grips, and to protect against penetration of well fluid between the protective tight casing and the upper and lower parts of the detachable sealed electrical connector wet contact type sealing elements are installed.