Method for long-distance wire passing or pressure guiding in narrow structure space

Abstract

The invention discloses a long-distance wire passing or pressure guiding method in a narrow structure space, which comprises the following steps of: arranging a groove on one side of an instrument body (1) far away from an instrument internal device (2), installing a wire passing or pressure guiding assembly (3) in the groove, connecting the upper end of the wire passing or pressure guiding assembly (3) with the instrument body (1) in a sealing way, and connecting the upper end of the wire passing or pressure guiding assembly (3) with the instrument body (1) in a sealing way; the lower end of the wire-passing or pressure-guiding assembly (3) is hermetically connected with a sealing tube (4) at the lower end of the instrument body (1); and then the wire passing or pressure guiding assembly (3) is sealed in the groove of the instrument body (1) through the cover plate (5). Long-distance wire passing is carried out in a narrow space by means of the wire passing or pressure guiding assembly, the problems caused by deep and long hole machining and sealing plug modes are avoided, other structural layouts are not affected, and it is guaranteed that instruments of different lengths can adopt a unified overall layout scheme; and the wire passing or pressure guiding assembly adopts a mode of welding the upper and lower joints with the stainless steel pipe, so that the processing cost is greatly reduced, and the applicability and universality of the mechanism are favorably improved.

Description

technical field [0001] The invention relates to a long-distance wire-passing or pressure-guiding method in a narrow structural space, and belongs to the technical field of downhole instrument wire-passing or pressure guiding. Background technique [0002] In oil field testing work, with the increase of test functions and the limitation of the overall layout of the instrument, it is often necessary to pass the line or conduct pressure between the modules inside the instrument in a narrow space, across modules, over long distances. Restricted by various factors such as the outer diameter of downhole tools, function settings, and processing methods, conventional downhole tools generally adopt the method of processing line holes or pressure guiding holes on the instrument body; The method of sealing plug + pressure-resistant wire. [0003] If the method of processing wire holes or pressure guide holes is used, it is necessary to process slender and deep holes on the instrument ...

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Problems solved by technology

[0003] If the method of processing wire holes or pressure guide holes is used, it is necessary to process slender and deep holes on the instrument body, and the processed slender and deep holes also need to avoid the test device installed in the instrument, so the processed slender and deep holes It is not an ordinary straight hole, the processing is difficult, the processing cost is high, the economy is poor, and special processing equipment is required, the scrap rate of parts is high, there may be weak points between the slender deep hole and the pipe wall, and the risk is high under high pressure

[0004] If the method of sealing plug + pressure-resistant wire is used to solve the problem of wire passing, it is necessary to arrange multiple sets of sealing plugs on the left and right sides of the part, and connect the sealing plugs with pressure-resistant wires; although this method can solve the problem of long-distance wire passing , but there is still a limited number of sealing plugs in a limited space, resulting in a limited number of wires; the sealing point between the sealing plug and the voltage-resistant wire is increased; it is necessary to ensure the pressure resistance, temperature resistance, and Insulation and other properties

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