Cable wet butt joint electric submersible screw pump

Abstract

The invention discloses a cable wet butt joint electric submersible screw pump which comprises a screw pump body, a flow guide cover is arranged above the screw pump body, a protector, a motor and a cable socket are sequentially arranged in the flow guide cover from bottom to top, a sealing cavity is formed above the cable socket, the cable socket is electrically connected with the motor, an oil pipe is arranged above the flow guide cover, a cable with a balance weight plug is arranged in the oil pipe, a plug lock is arranged on the outer side of the cable with the balance weight plug, the cable with the balance weight plug penetrates through the interior of the oil pipe and enters the interior of the sealing cavity, and the cable with the balance weight plug is inserted into the cable socket and locked through the plug lock. A control system is further included, and the motor is electrically connected with the control system. According to the invention, the problem that the externally hung cable is easy to damage and cannot be repeatedly used is solved, a large number of auxiliary materials for protecting the cable can be omitted, the well descending difficulty is overcome, the problem of paraffin removal in the oil pipe is solved, and the service life of the protector and the motor is prolonged.

Description

technical field [0001] The invention relates to the technical field of electric submersible screw pumps, in particular to an electric submersible screw pump with wet connection of cables. Background technique [0002] At present, the cables of the electric submersible screw pump are laid to the ground along with the outer wall of the oil pipe, and the unit structure adopts the screw pump and the protector on the upper part of the motor to realize oil and gas recovery. The cable laying on the outer wall of the oil pipe has the following problems: 1. The cable is easy to be damaged when it passes through the narrow space between the oil pipe and the casing, and a large amount of auxiliary materials are needed to protect the cable around the cable. ; 2. The cable will be crushed when encountering well deviation and casing deformation, which will cause the cable to not be reused and increase the production cost. In addition, the screw pump is installed on the top of the motor, ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an electric submersible screw pump with wet docking of cables, which solves the problem that the outer wall of the oil pipe is easy to be damaged when the cable is laid, and the auxiliary materials protecting the cable around the cable are easy to fall off or get stuck in the equipment and cause the overhaul of the oil and gas well. The screw pump is installed on the motor. The problem that the service life of the protector and the motor will be shortened

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