Electric submersible pump for multistage dual-reverse-screw lifting split bearing structure

Abstract

The invention discloses an electric submersible pump for a multistage dual-reverse-screw lifting split bearing structure, and the electric submersible pump mainly solves the problems that an existingoil-immersed pump is unstable in operation, is low in efficiency and is good in fluid conveying performance under complex working conditions such as high sand content and high gas content. The electric submersible pump is characterized in that the lower part of an upper joint (1) is connected with an upper outer barrel (11), the upper part of a lower joint (8) is connected with a lower outer barrel (12), at least two bearing straightening bodies (5) are arranged between the upper outer barrel (11) and the lower outer barrel (12), a stator (7) is connected between the bearing straightening bodies (5), a rotor (6) is arranged inside the stator (7), and the rotor (6) is connected on a main shaft (2); and a turning direction of a stator spiral blade inside the stator (7) is reverse to that ofa rotor spiral blade outside the rotor (6). The electric submersible pump for the multistage dual-reverse-screw lifting split bearing structure disclosed by the invention is suitable for performing mixing and transporting operation of oil, gas, water, sand and the like under bad well conditions such as high gas content and high sand content, is stable in performance, and is high in efficiency.

Description

technical field [0001] The invention relates to the field of machinery, in particular to an electric submersible pump with a multi-stage double-reversed helical lifting split bearing structure. Background technique [0002] In the process of oil, natural gas, shale gas exploitation, etc., the field of oil and gas wells is becoming more and more extensive. Due to the increasing difficulty in the later stage of oil extraction, there is an urgent need for a well that can operate under complex conditions such as high sand content and high gas content. Fluid machinery; Submersible oil production equipment is more and more widely used in the field of oil drilling and production due to its advantages of easy management and reliable operation. [0003] The narrow flow channel requirements of traditional centrifugal pumps not only make processing difficult, but also easily blockage and generate airflow separation vortex phenomenon, resulting in vibration, air lock and low efficiency;...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of the existing submersible pumps in complex working conditions such as high sand content and high gas content, such as unstable operation, low efficiency, and poor fluid delivery performance, the present invention provides a multi-stage double reverse spiral lifting split

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