Oil-submerged hollow rotor screw pump oil extraction device

Abstract

The invention relates to the technical field of oil extraction engineering, and belongs to an oil-submerged hollow rotor screw pump oil extraction device with a hollow screw pump rotor and being capable of providing a well flushing channel. The problem that an existing oil-submerged hollow rotor screw pump oil extraction system is short of a controllable hot washing well flushing channel is solved. The oil-submerged hollow rotor screw pump oil extraction device is composed of an anchoring tool (1), an oil-submerged motor (2), a motor protector (3), a coupling (4), a screw pump stator (5), thescrew pump hollow rotor (6), a hot washing valve (7), a centralizer (8), an oil pipe (9), an oil-submerged cable (10), a wellhead (11), a junction box (12) and a ground control cabinet (13). Accordingto the oil-submerged hollow rotor screw pump oil extraction device, technological means are provided for establishing oil sleeve communication when an oil well of the oil-submerged screw pump oil extraction system is produced or operates, maintenance of the oil extraction system is improved, and daily maintenance and operating costs are reduced.

Description

technical field [0001] The invention relates to the field of oil extraction engineering, and belongs to an oil submersible hollow rotor screw pump oil extraction device whose rotor is hollow and which can provide a well washing channel. Background technique [0002] The screw pump used in the existing submersible screw pump oil production technology has a solid rotor structure, and there is no controllable well washing communication channel between the tubing and the casing. When the oil well needs hot washing to remove wax, the normal rotation of the screw pump is required to suck the hot washing liquid injected into the casing into the oil pipe. When the downhole submersible screw pump unit of the oil well breaks down and needs to be cleaned, the screw pump cannot rotate and work. At this time, the hot washing channel cannot be established inside and outside the tubing string, and the downhole pressure cannot be released and balanced, resulting in load during the string li...

AI Technical Summary

Problems solved by technology

When the downhole submersible screw pump unit of the oil well fails and needs to be cleaned, because the screw pump cannot rotate and work, at this time, the hot washing channel cannot be established inside and outside the tubing string, and the downhole pressure cannot be released and balanced, resulting in load during the string lifting process. Big, high safety risk, requiring overhaul team construction, increasing operating costs and prolonging the construction period

[0003] In order to solve the lack of controllable heat-washing and well-flushing channels in the existing submersible screw pump system, and give full play to the advantages of the electric submersible screw pump oil production system, a submersible screw pump with a hollow rotor and a well-flushing channel is invented. A new type of submersible screw pump oil production device

Images