Insulation enhancement protection technology method special for cable root of electric submersible pump

A special cable and process technology, applied in the direction of cable joints, cable accessories, connection insulation, etc., can solve the problem of inability to protect cable insulation, and achieve the effect of reducing the number of pump inspection operations, improving production efficiency, and improving operating life.

Inactive Publication Date: 2020-11-13
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the conventional process method cannot protect the insulation of the cable root during the connection process of the submersible cable, the present invention proposes a special cable root insulation enhancement protection process method for electric submersible pumps

Method used

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  • Insulation enhancement protection technology method special for cable root of electric submersible pump

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Embodiment

[0018] In order to facilitate the understanding of the operation process of this method in actual work, the basic structure of the submersible cable and the routine process of docking are briefly described. The submersible cable includes copper core, polyimide film, insulating layer, Sheath layer and armor layer, when two submersible cables are connected, it is necessary to peel off part of the outer layer of armor layer, sheath layer and insulation layer, and then connect the copper core. The following cable root insulation enhancement protection method occurs After peeling off the armor layer, sheath layer and insulation layer of the outer layers of the two submersible cables, and before the copper core connection operation, only the root of the special cable for the reinforced electric submersible pump is insulated and protected through this step.

[0019] Step 1. At the position 5-15cm from the root of the first submersible cable and the second submersible cable to the copp...

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Abstract

The invention discloses an insulation enhancement protection technology method special for a cable root of an electric submersible pump. The method can be used to protect an insulation layer at the root of a cable from damage caused by stress concentration, meanwhile, the root of the cable is coated with a special insulation sealant to prevent gas channeling through a sheath layer, a high-temperature-resistant and high-pressure-resistant heat shrinkable tube is used for conducting heat shrinkage on a cable connecting part, and after heat shrinkage, the two ends of the heat shrinkable tube arewound with a pressure-sensitive adhesive tape to prevent gas channeling through the two ends. The connecting part of the submersible cable has relatively strong insulation and mechanical properties. The service life of an oil-submerged pump is prolonged, pump inspection operation times caused by cable connection faults are reduced, and oil field production timeliness is improved.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation technology, and in particular relates to a process method for insulation enhancement and protection of a special cable root of an electric submersible pump. Background technique [0002] The submersible cable is an important part of the electric submersible pump system. Its main function is to transmit the electric energy on the ground to the electric submersible pump. The electric submersible pump converts electric energy into mechanical energy to lift the well fluid to the surface to realize the exploitation of the oil well. [0003] However, in actual use, due to the requirements of the on-site production process, it is necessary to cut off the submersible cable and then re-adjust the docking, which forms a weak point at the docking position. The insulation here is prone to failure in the high-temperature and high-pressure environment underground, resulting in a short circuit. It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G1/14H02G15/18H01R4/72
CPCH01R4/72H02G1/14H02G15/1806
Inventor 张光一崔伶瑜付军刘滔路志斌袁建楠唐倩李令喜黄新春
Owner CHINA NAT OFFSHORE OIL CORP
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