Lifting device of electric submersible piston pump in horizontal wells

Abstract

A horizontal well submersible electric plug pump lifter resolves the problems of prior horizontal well lifter as high cost and large discharge. The invention is characterized in that the device also comprise a small-diameter high-flexibility permanent-magnetic straight motor (44) and a horizontal lifting oil pump (43), wherein, the motor (44) is mainly formed by a stator and a rotor, and the oil pump (43) is mainly formed by a fixed flange, a pump cylinder (23), a plug (22), upper and lower movable flanges, and the stator is connected with the pump cylinder (23) and the rotor is connected with the plug (22). The invention has low cost and the application in low discharge, for resolving the deflected abrasion between rod and tube, to work at variable flow pressures.

Description

Technical field: [0001] The invention relates to a lifting device in the field of oil production engineering in oil fields, in particular to a rodless pump lifting device applied in the field of horizontal well oil production. Background technique: [0002] At present, many peripheral low-yield and low-permeability oil fields in China have been developed using horizontal well technology. With the decreasing oil resources, the scale of using horizontal well is expanding year by year. At present, the lifting technologies used in horizontal wells mainly include rodless pump lifting technologies such as electric submersible pumps and hydraulic jet pumps. However, due to high investment and large displacement, these mature technologies are difficult to meet the requirements of low permeability and low water production. The needs of flat well lifting, especially the deep pumping needs of horizontal wells and high-inclination directional wells are difficult to meet. However, if th...

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Problems solved by technology

[0003] In order to solve the problem that the existing horizontal well lifting device adopts electric submersible pump and hydraulic jet pump, which leads to high investment and large displacement, which is difficult to meet the needs, and the use of rod pumps cannot solve the problems of eccentric wear between rods and pipes, etc., the present invention Provided is a horizontal well electric submersible plunger pump lifting device, the horizontal well electric submersible plunger pump lifting device has low production cost, can work at a small displacement, and can solve the problem of eccentric wear between rods and pipes , reduce the operation and maintenance workload of the rod system factor, and extend the pump inspection cycle

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