High gas-oil ratio oil well gas-liquid separation system
A gas-oil ratio, oil well gas technology, applied in wellbore/well components, production fluid, earthwork drilling and production, etc., can solve problems such as inapplicability, poor gas and oil separation effect, small gas anchor separation chamber, etc., to achieve Easy to unload and prevent backflow of well flushing fluid
Active Publication Date: 2018-08-14
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
[0003] 1. Commonly used gas anchors have small separation chambers and small swirl radius, which results in low separation efficiency and cannot be applied to production wells with high gas-oil ratio;
[0004] 2. The existing casing separation device adopts a single channel, and the upward gas flow and the downward oil flow have the same flow channel, so the gas and oil separation effect of the high gas-oil ratio production well is poor;
[0005] 3. Commonly used gas anchors and existing casing separators have the problem of backflow of well flushing fluid during well flushing or inability to unload oil during downhole operations
Method used
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[0020] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that these embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.
[0021] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0022] The gas-liquid separation system for high gas-oil ratio oil wells provided by the present invention includes: a casing arranged in the well and a dual-channel gas-liquid separator, a mixing Gas-liquid transmission channel assembly and liquid inlet device assembly, the distance between the wellhead and the bottom of the well is the length of the casing.
[0023] The structures of the dual-channel gas-mixture-liquid se...
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The invention provides a gas-liquid separation system for a high-gas-oil-ratio oil well. The gas-liquid separation system comprises a casing arranged in the well, as well as a double-passage gassy liquid separator, a gassy liquid delivery passage assembly and a liquid inlet device assembly which are arranged in the casing and sequentially connected from top to bottom through tubing couplings, wherein the length of the casing is equal to the distance between a wellhead and a well bottom; the top of the double-passage gassy liquid separator is connected with an oil pump, and the bottom of the liquid inlet device assembly is connected with a sand settling pipe. According to the system, the rotational flow velocity and the rotational flow radius are increased, and gas flow passages are additionally arranged, so that the underground gas, sand and oil separation efficiency of a high-gas-oil-ratio mechanical oil well is improved; in addition, a gassy liquid passage check valve and a double-layer telescopic pipe are arranged, so that the function of preventing a flushing fluid from flowing backward during flushing is realized, and the aim of conveniently dismounting an upper liquid column of a packer during underground operation can be also fulfilled.
Description
technical field [0001] The present invention relates to the field of oil field technology, and more specifically, relates to a method that can efficiently separate oil, gas and sand at the suction inlet of a downhole pump during production of a high gas-oil ratio mechanical oil recovery well, and at the same time, can separate and seal the well when washing the well. It is a high gas-oil ratio oil well gas-liquid separation system that prevents backflow of well flushing fluid and can unload oil to prevent blowout during pump inspection operations. Background technique [0002] At present, crude oil production in oilfields mainly adopts mechanical oil recovery methods. When producing mechanical oil recovery wells with high gas-oil ratio, deep well pumps suck crude oil containing free gas and high sand content, which will affect the efficiency of deep well pumps. Therefore, at the suction inlet of deep well pumps. Air-sand separation devices such as air-sand anchors are added....
Claims
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IPC IPC(8): E21B43/38
CPCE21B43/38
Inventor 黄新武魏灿灿
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY