Double-inlet and single-outlet submersible screw pump oil extraction device

Abstract

The invention discloses a double-inlet and single-outlet submersible screw pump oil extraction device, which solves the problems of short bearing service life and the like of the existing submersible screw pump oil extraction device. The double-inlet and single-outlet submersible screw pump oil extraction device comprises a submersible motor, a planetary speed reducer, a screw pump, an oil protector, a thrust coupler, an oil outlet check valve and an oil pipe line group which are connected in a header pipe from top to bottom. The invention has the technical points that the screw pump an upper screw pump and a lower screw pump, wherein the upper screw pump whose delivery capacity is small is provided with an upper oil supply hole, and the lower screw pump whose delivery capacity is large is provided with a lower oil supply hole; pump rods of the upper screw pump and the lower screw pump whose rotation directions are opposite are hinged with a universal coupling; the pump body of the upper screw pump is connected with the oil outlet check valve and the oil pipe line group, and axial confluence oil discharging holes are respectively arranged in a stream guidance body and a shunting cover. The invention has optimizing structure, scientific design and reasonable stress distribution and matching, has the advantages of the mechanical drive device of an electric submersible screw pump oil extraction system, effectively improves the service life of the bearing, prolongs the service cycle of the oil extraction device, lowers maintenance cost and obviously improves the working performance of oil extraction and oil output.

Description

technical field [0001] The invention relates to an oil production device for an oil production system in an oil field, in particular to a double-inlet and single-outlet submersible screw pump oil production device which significantly prolongs the service life, increases the oil production, and expands the scope of application. Background technique [0002] At present, due to the submersible screw pump device used in the oil production system of the oil field, the advantages of oil recovery are significant energy saving, no rod eccentric wear, small footprint, and suitable for oil fields with high sand and water content, so it has been widely used. In order to obtain the advantages of environmental protection, energy saving and high efficiency in the process of oil production in domestic and foreign oil fields, the mechanical transmission devices of their submersible screw pump oil production systems are generally improved. There are many mechanical transmission devices used ...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a double-inlet and single-outlet submersible screw pump oil production device, which solves the problem of bearing service life in the existing submersible screw pump oil production device Short and other problems, its structure optimization design is scientific, and the force distribution is reasonable. In addi

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