A special cable for oil well exploration

Abstract

The invention discloses a special cable for oil well exploration, and specifically relates to the field of cable processing. The special cable includes a cable body. An optical fiber sleeve is arranged at the axis of the cable body. Copper conductors are arranged outside the optical fiber sleeve. An insulating layer is arranged outside each copper conductor. A connecting sleeve layer is arranged outside each insulating layer. A buffer sheath is arranged outside the connecting sleeve layers. An oil-resistant cushion layer is arranged outside the buffer sheath. The three connecting sleeve layersare bonded to form an integral structure to prevent the conductors from being deformed and broken under stress. The optical fiber sleeve is set to place optical fibers, which improves the accuracy ofoil well detection. The buffer sheath improves the thermal capacity of the cable. By adopting a honeycomb structure, the weight is reduced, the impact buffering effect of the cable is improved, and heat dissipation of the copper conductors is facilitated. The buffer sheath and the oil-resistant cushion layer isolate oil, water and corrosive gas, and ensure long-term use of the cable in an oil well. An armor layer and load bearing fibers improve the carrying capacity of the cable. Rebound steel wires rebound to a straight state almost with no bend after bending, and thus, the internal wear andtear of the cable is reduced.

Description

technical field [0001] The invention relates to the field of cable processing, more specifically, the invention relates to a special cable used for oil well exploration. Background technique [0002] The submersible pump power cable is a special cable used in conjunction with the submersible electric pump unit. It is laid in the oil well. The lower end of the cable is connected to the lead, and the upper end is connected to the ground control cabinet. The working conditions in oil wells are harsh, often in high temperature, high pressure, and highly corrosive environments such as oil and gas. In this environment, the quality requirements for cables are very high. [0003] The Chinese patent of patent application publication number CN 102143619 B discloses a heating cable for oil wells, which includes an outer sheath. A plurality of wires, a plurality of carbon fiber heating elements arranged helically along the wires are uniformly wound on the plurality of wires, and a plur...

AI Technical Summary

Problems solved by technology

[0004] However, the oil well heating cable provided in the above technical solution still has many disadvantages in actual use, such as the cable goes deep into the oil well, and under the action of the submersible oil pump at the bottom of the cable and its own weight, the cable is stressed and the cable is easily twisted. Deformation, even breakage, in the process of stress, the copper wire is prone to torsion and winding, resulting in local heating and affecting the flow of current, especially in oil well exploration, due to long-term work in harsh environments, the cable will inevitably wear out, and The optical fiber cannot be effectively protected, which seriously affects the detection accuracy

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