Downhole oil-water separation and same well injection-production device and method capable of utilizing single motor to drive two pumps

Abstract

The invention relates to the technical field of oil production technology, discloses a downhole oil-water separation and same well injection-production device and method capable of utilizing a singlemotor to drive two pumps, and aims to solve the problems that according to the screw pump extraction-electric pump injection scheme of the original same well injection-production technology, the eccentric wear of a rod and tube is serious, the pump inspection period is short, and the one-time invested cost is high. The downhole oil-water separation and same well injection-production device is composed of a pressure adjusting valve (1), a power cable (2), a check valve (3), an extraction pump (4), a hydrocyclone (5), a submersible motor (6), a signal cable (7), an injection pump (8), a downholemulti-parameter sensor (9), a sealing section (10) and a packer (11). The device can use one submersible motor to simultaneously drive two electric submersible pumps, controls the injected liquid quantity and the extracted liquid quantity through a ground control cabinet and the pressure adjusting valve separately, and has the advantages of being adjustable independently, high in oil-water separating efficiency and low in one-time invested cost of an injection-production system.

Description

technical field [0001] The invention belongs to the technical field of oil field oil recovery technology, and belongs to a downhole oil-water separation and injection-production device and method driven by a single motor and double pumps. Background technique [0002] The original downhole oil-water separation and injection-production technology in the same well adopts the scheme of "screw pump production-electric pump injection". , short pump inspection period, etc., and this method uses two sets of drive equipment, the screw pump and the electric pump, and the one-time investment cost is high. A single-motor-driven double-pump downhole oil-water separation and injection-production device in the same well. A submersible motor is used to drive the production pump and the injection pump at the same time. Grinding problem, saving input cost. Contents of the invention [0003] The purpose of the present invention is to develop a technology that can solve the problems of sev...

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Problems solved by technology

[0003] The purpose of the present invention is to develop a technology that can solve the problems of severe partial wear of rods and tubes, short pump inspection period, and high input cost when the original injection-production technology of the same well "screw pump production-electric pump injection" method is applied to inclined wells. A single-motor-driven double-pump downhole oil-water separation and injection-production device and method in the same well

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