Cable joint and connecting method thereof

Abstract

The invention discloses a cable joint and a connecting method thereof. The cable joint comprises an eccentric pipe and a sealing portion, wherein oil pipes are fixedly connected to two ends of the eccentric pipe respectively, and a U-shaped notch is arranged in a side surface of the eccentric pipe; the sealing portion is fixedly connected into the U-shaped notch, cables penetrate into the two sides of the sealing portion respectively, and cable cores of the cables are hinged in an internal portion of the sealing portion. The sealing portion comprises a sealing short section, a joint, a card sleeve and a pressing head, wherein a cavity is arranged in the sealing short section, and internal threads are processed at two ends of the cavity respectively; a through hole is arranged in the joint, and the joint is connected to two ends of the sealing short section through threads; the card sleeve is conical, one end with a smaller diameter of the card sleeve is clamped into the through hole,and one end with the larger diameter is exposed out of a portion, away from a sealing short section end surface, of the joint; and the pressing head is in threaded connection with the joint. The invention aims at solving problems of easy collision, easy disconnection, poor sealing performance, a complex binding process and the like during connection of cables used in oil field wells at present.

Description

technical field [0001] The invention belongs to the technical field of oilfield water well cable connection, and in particular relates to a cable joint and a connection method thereof. Background technique [0002] The cables used in oilfield water wells are mainly used for downhole signal transmission, downhole equipment power supply and internal cable core protection. , due to the limitation of cable size and length, knocking and breaking, and bending and breaking, the cables need to be re-connected. [0003] The current cable connection method is to hinge the two cable cores, use adhesive tape to insulate and seal, and then bind the hinged cable on the oil pipe body through the oil pipe clamp to go downhole with the oil pipe. The main problems of this connection method are: 1. When the cable goes into the well, the clips of the tubing are likely to collide with the casing, causing the clips to break off and the hinged cable to be disconnected; 2. The outside of the cable...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a cable joint and its connection method, aiming to solve the problems of easy bumping, easy disconnection, poor sealing and complicated binding process in the connection of cables used in oil field water wells.

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