WMF series sealed wear-resisting load-bearing detection cable

Abstract

The invention discloses a WMF series sealed wear-resisting load-bearing detection cable comprising a conductor, an insulating layer, a shielding layer, armor layers, and a sheath layer. The cable is characterized in that the armor layers include an inner armor layer and an outer armor layer; the inner armor layer is formed by twisting multiple round steel wires; and the outer armor layer includes multiple steel wire ropes, and each steel wire rope is formed by twisting multiple fine and soft steel wires. Metal instead of a semi-conductive material is used for shielding purpose, so the shielding effect is more thorough, and signal transmission is more stable. The gaps between the steel wires, between the inner armor layer and the outer armor layer and between the cable and a choke tube are filled with sealant or an extrusion sheath, so it is less difficult to put the cable underground, the service life is prolonged, and environmental pollution is reduced greatly. The outer armor layer is composed of multiple strands of wire ropes instead of multiple round steel wires, so the flexibility and tensile strength of the cable are improved greatly.

Description

technical field [0001] The invention relates to the field of cables, in particular to a WMF series sealed wear-resistant load-bearing detection cable. Background technique [0002] The load-bearing detection cable is used as the connection line for downhole instrument measurement, and it also has the function of transmitting signals while carrying equipment. Affected by objective factors such as existing logging technology and logging conditions, steel wire bulging, wire jumping and environmental pollution often occur during the use of cables. Traditional logging cables can no longer meet the needs of use, and it is urgent to make Changes to meet market demand for this cable. [0003] The existing logging cable structure is in the form of conductor, insulation, shielding, and double-layer steel wire armor. The following problems will inevitably exist in the production process of this type of cable: [0004] 1. The gap between the steel wire and the steel wire, between the ...

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Problems solved by technology

[0005] 2. The outer diameter tolerance of the cable is difficult to be effectively controlled when the steel wire is armored;

[0006] 3. The double-layer steel wire armored cable has poor flexibility and large bending radius. For example, the patents CN102623102A and CN201717033U in the prior art disclose cables for underground detection, and steel wires of the same diameter or different diameters are used to form a double-layer armored structure. , although it can ensure the tensile strength and wear resistance of the cable, this structure has poor flexibility and is difficult to meet the use requirements in a high-demand environment.

[0007] At the same time, the traditional logging cable will be accompanied by steel wire wear and fracture during use, and the tensile strength of the cable will decrease; the outer diameter dimension tolerance is large, and it will be stuck when going downhole; high-pressure fluid overflows to the well surface along the cable gap, causing a large area of ​​​​environmental pollution

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