Fusible single core cable release device

Abstract

The invention discloses a fusible single core cable release device. The fusible single core cable release device comprises a brake bar, a locking hook made of a memory material sleeves the outer sideof the one end of the brake bar, a spacer is arranged at the end part of the locking hook, an upper shell body sleeves the other end of the brake bar, one end of the upper shell body covers the locking hook, the other end of the upper shell body is connected with a lower shell body through a thread structure, wherein an insulating quartered barrel is arranged in the lower shell body, a heater sleeves the outer part of the insulating quartered barrel, a protector fuse is arranged between the insulating quartered barrel and the heater, one end of the insulating quartered barrel is connected withthe brake bar, and a second cushion pad sleeves the outer side of the joint of the insulating quartered barrel and the brake bar. The device takes the advantage of the electrical weakness, a fuse circuit acts under the condition that an instrument set does not work, a cable is guaranteed to be separated out through only 30 KG tensile force when the cable is fused or released, the mistaken explosion of an electronic detonator is not caused, and the fusible single core cable release device is more economical and practical when being compared with the traditional mechanical weakness pulling.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a release device for a fusible single-core cable. Background technique [0002] During the perforation operation, the fusible single-core cable release system can be used as an ordinary bridle to complete the perforation operation; once the logging tool is stuck, or when the perforation tool string must be released according to the perforation needs; cut off the perforation tool The power supply of the string is provided by the ground power supply panel or the ground control box dedicated to the releasable joint to provide a specific voltage to the releasable device, and this voltage will not affect the circuit part of the perforation tool string. The heating device will be turned off within 60S. The fuse protector was blown, thereby realizing the separation of the bridle from the perforating instrument string. [0003] However, the existing fusible single-core cable ...

AI Technical Summary

Problems solved by technology

Its disadvantages are: the breaking value of the steel wire of the new and old cables is inconsistent, so the force value of breaking the steel wire can only be controlled according to experience, and the accuracy is not easy to control; at the same time, the torpedo that fixes the steel wire must be replaced once it is pulled off, and the cost is relatively high.

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