Large-discharge electric submerged screw pump oil extracting equipment

Abstract

The invention relates to large-discharge electric submerged screw pump oil extracting equipment. Compared with the traditional electric submerged screw pump oil extracting equipment which belongs to a large-discharge series and also mainly comprises an underground motor, an underground rotating type mechanical drive device, an underground screw pump, and the like, the large-discharge electric submerged screw pump oil extracting equipment has the technical scheme key that the underground screw pump is connected with an underground multistage motor by the underground rotating type mechanical drive device; the screw pump is rigidly fixed on the sleeve pipe wall of an oil well by adopting the underground multistage motor with high torque output and vibration resistance, a drum-gear coupling with high torque output, vibration resistance and an opening type structure, a series combined stopping type bear joint and an underground rotating type mechanical drive device of a compensating type lubricating oil tank through an anchoring device; the problem of oil leakage of an oil pipe of a large-gradient well or a horizontal well is solved by adopting a hydraulic type oil pipe oil drainer; and the large discharge of the electric submerged screw pump is realized by the technical measures, and thus the invention can be used for the oil well with large-discharge (more than 200m<3>/d) on the electric submerged screw pump.

Description

technical field [0001] The invention belongs to the technical field of oil production equipment for oilfields, in particular to a large-displacement electric submersible screw pump oil production equipment matched with offshore heavy oil oilfield production. Background technique [0002] As we all know, the consumption and utilization of energy is a necessary guarantee for the sustainable development of science and technology and the realization of modernization. Petroleum is known as "the blood of industry" and is an indispensable energy source. There is a large amount of oil on the earth on which human beings depend, whether it is underground or in the ocean. At present, many countries in the world are constantly developing and improving oil extraction equipment in order to develop their own economies. For oil extraction equipment on land, both the uphole and the downhole have reached a certain advanced level. However, for the exploitation of heavy oil fields, especially ...

AI Technical Summary

Problems solved by technology

However, for the exploitation of heavy oil fields, especially for the exploitation of heavy oil at sea, there are still some technical problems in the existing oil production equipment, such as rod pumps, electric submersible centrifugal pumps, hydraulic pumps, etc.: such as low efficiency, easy to sand Card, short life, complex and huge ground supporting facilities, wellhead dynamic seal is easy to leak, and cannot be used in inclined wells, horizontal wells, etc.

[0003] Although the electric submersible screw pump that appeared in recent years has solved the above problems, there are still shortcomings, mainly because its main index is the first displacement problem, which is medium and low displacement, and cannot reach 200m 3 Large displacement above / d leads to high cost and cannot meet the displacement requirements of supporting oil production equipment for current and future offshore heavy oil field development

[0004] The main reason why the original electric submersible screw pump cannot reach a large displacement is that the output torque capacity of its motor and mechanical transmission device is low. In addition, its overall structure and local structure are not suitable for large displacement, high vibration intensity, large slope or even horizontal In the case of installation and use, its supporting technology does not have the function of flushing the well without moving the pipe string and the smooth oil drainage of the tubing in highly deviated wells and horizontal wells

And the service life is short, the application field is limited

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