Circular-flat integrated cable for electric submersible pump

Abstract

A circular-flat integrated cable for an electric submersible pump is disclosed. In order to overcome the disadvantage that the present belting method is hard to ensure the sealing performance at the connected place of a circular cable and a flat cable, so that an insulating layer is corroded by an underground oil-gas environment, and thus the cables are failed in advance, an insulating layer and an oil-resisting layer are orderly covered outside the conductor disclosed by the invention to be a core, the three cores of the circular cable are covered by a jacket layer after being arrayed in a triangle, and an armour layer is disposed outside the jacket layer; the armour layer, the jacket layer and the oil-resisting layer on the end part of the circular cable are orderly peeled off to exposethe insulating layer, and after the conductors of the three cores on the end part of the circular cable are twisted with the conductors of the three cores of the flat cable, a moulding and a vulcanization for the transition belt rubber jacket layer of the circular cable and the flat cable are finished on a rubber processing device; and an armour layer is covered outside the transition belt rubberjacket layer of the circular cable and the flat cable by a steel belt to form a circular-flat integrated cable. The circular-flat integrated cable for an electric submersible pump has the advantage that the connected place of a circular cable and a flat cable is moulded once, so that a sealing defect existing during a connection process is efficiently avoided, and the lives of the cables are efficiently prolonged.

Description

Technical field [0001] The invention relates to a cable for a submersible pump unit of petroleum oil extraction machinery, in particular to a round-flat integrated submersible electric pump cable. Background technique [0002] Electric submersible pumps are widely used in the field of oil exploration. Electric submersible pump cables are specially sealed cables that transmit electric energy to underground submersible motors, including flat cables and round cables. The flat cable is used to be installed on the unit; the power cable is a round cable, and the round cable is installed on the oil pipe, fixed with the cable clip and the oil pipe, and then lowered into the well together. Due to the harsh working environment of the submersible electric pump cable, the cable is required to have good corrosion resistance and good sealing performance to ensure that the well fluid will not penetrate into the insulating layer; it has good temperature and pressure resistance and can work ...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the difficulty of ensuring the sealing performance of the connection between the round cable and the flat cable in the existing tape method, gas and fluid channeling are prone to occur at the cable joint during use, causing the insulation layer to be eroded by the downhole oil and gas environment and the cable to fail early, affecting Cable life, resulting in the increase of oil production costs, the invention provides a round flat integrated electric submersible pump cable

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