Underground screw pump and construction method for penetrating underground screw pump

Abstract

The invention discloses an underground screw pump and a construction method for penetrating the underground screw pump. The underground screw pump comprises a positioning pin, the positioning pin is connected to the lower end of a stator, and a center hole allowing a construction instrument or a tool to pass through is formed in the positioning pin. During construction, the lower end of the stator is connected to the positioning pin, the upper end of the stator is connected to a pump upper pipe column, the lower end of the positioning pin is connected to a pump lower pipe column, and the lower end of the positioning pin is lowered to a preset depth in a well; the construction instrument or the tool is connected to the lower end of a construction cable or a rod pipe, and a sliding centralizer is installed on the construction cable or the rod pipe above the construction instrument or the tool; and the construction cable or the rod pipe are lowered to enable the construction instrument or the tool to pass through the stator and the positioning pin, and the construction cable or the rod pipe are lowered to a preset position for construction. According to the underground screw pump and the construction method for penetrating the underground screw pump, the periods of test oil and production operation can be greatly shortened, the operation cost can be reduced to a largest extent, the construction operation range of the combined use of the screw pump and other tools is enlarged, the construction efficiency is improved, and meanwhile, the protection of reservoir is facilitated.

Description

technical field [0001] The invention relates to a downhole screw pump driven by the ground in the petroleum industry, in particular to a downhole screw pump and a construction method of the downhole screw pump. Background technique [0002] In oil and gas exploration and development, in order to save construction costs and shorten the construction period, the construction operation method of combining perforation and pumping in one string is often used, which can greatly reduce construction operation costs and shorten the operation period. [0003] For wells with a perforated well section of no more than 1500m, a ground-driven downhole screw pump is often used as a pumping tool. The ground-driven downhole screw pump is a ground-driven device that transmits the rotational torque to the rotor through the sucker rod string, and drives the rotor to rotate to achieve liquid drainage. Compared with other liquid drainage methods, it has the advantages of low production cost, conve...

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Problems solved by technology

[0007] The purpose of the present invention is to address the above-mentioned defects in the prior art, to provide an underground screw pump and a construction method for crossing the downhole screw pump, to solve the problem that the screw pump cannot pass through the construction cable or the rod pipe, and to realize the construction of the pump under the pump. The application range of the multi-functional string with screw pump reduces the operating cost of tubing transport perforation and screw pump construction well

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