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Oil pumping device for down-hole oil and gas separation

An oil pumping and oil and gas technology, applied in wellbore/well components, production fluids, earthwork drilling, etc., can solve problems such as easy aging, sticking, downhole engineering accidents, etc., to reduce gas content, fully separate, and improve pump efficiency Effect

Inactive Publication Date: 2020-04-24
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the complex structure of the gas anchor, many parts, and large volume, the following problems often occur when the gas anchor is used as an oil-gas separation device in the downhole: it is easy to age; the downhole construction is not convenient enough, limited by the downhole situation; the occurrence of the accident

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  • Oil pumping device for down-hole oil and gas separation

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Embodiment Construction

[0041] In order to make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art.

[0042] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "middle", "lower", "top", "bottom" etc. is based on the orientation or positional relationship shown in the drawings , or the usual orientation or positional relationship of the product of the invention in use, is only for the convenience of describing the present invention and simplification of the description, rather than indicating or implying that the structure or system referred to must have a specific orientation, be constructe...

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Abstract

The invention discloses an oil pumping device for down-hole oil and gas separation, and belongs to the technical field of down-hole operation. The oil pumping device comprises an oil string and an rodstring located in the oil string, wherein the oil string comprises an oil pipe suspended on an oil well casing, an oil sleeve annulus formed between the oil pipe and the casing, and an oil pipe liquid inlet arranged on the oil pipe; and the rod string comprises an oil pumping rod located in the oil pipe, and a rod type pump connected to the bottom of the oil pumping rod. According to the oil pumping device, a gas anchor is not adopted, the rod string is arranged in the oil string, and the distance between a liquid inlet of the oil pipe of the oil string and an oil inlet of the rod type pump of the rod string is larger than 4 meters, so that downward moving bubbles and oil flows generate large displacement to achieve sufficient separation, and therefore, the gas content of liquids enteringthe rod type pump is effectively reduced, the influence of gas on pumping efficiency is reduced favorably, and the pump efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of downhole operations, in particular to an oil pumping device for downhole oil and gas separation. Background technique [0002] In the process of oil well production, it is usually necessary to separate the free gas in the well fluid from the well fluid downhole, and the liquid is sent to the submersible centrifugal pump (oil well pump, rod pump, screw pump, etc.), and is pumped out of the oil pipe to the surface, and the gas is Released into tubing and casing annulus for collection at surface. [0003] At present, the existing downhole oil and gas separation devices used in pumping wells in my country are usually gas anchors. The anchor separates part of the gas and reduces the amount of gas entering the pump barrel, thereby reducing the impact of the gas on the pump and improving pump efficiency. [0004] Due to the complex structure of the gas anchor, many parts, and large volume, the following problem...

Claims

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Application Information

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IPC IPC(8): E21B43/38E21B43/12
CPCE21B43/121E21B43/38
Inventor 毕文杰赵正勋郭海生王佩张建伟赵建民唐成云
Owner PETROCHINA CO LTD
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