A downhole double-tube single-stage adjustable gas-liquid separator
A gas-liquid separator and single-stage adjustment technology, which is applied in separation methods, liquid degassing, wellbore/well components, etc., can solve the problems of single applicable flow pattern, low liquid production, low gas content, etc., and achieve Avoid fatigue damage, the effect of large gas content range
Active Publication Date: 2021-07-27
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
[0007] The present invention focuses on solving the technical problems that the separator is suitable for low gas content, low liquid production rate, poor separation efficiency, single applicable flow pattern, especially incapable of efficient operation in the oscillating flow pattern in the current downhole gas-liquid separation process, and provides An downhole double-tube single-stage adjustable gas-liquid separator, which organically combines the three separation principles of centrifugal separation, gravity separation, and collision separation. Efficient separation of liquid mixtures
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[0034] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:
[0035] Such as figure 1 As shown, an embodiment of the present invention provides a downhole double-tube single-stage adjustable gas-liquid separator, which mainly includes an upper joint 1, a gas phase outlet 2, a baffle tie bar 3, a separation baffle 4, and an outer cylinder Body 5, inner cylinder 6, gravity separation chamber 7, liquid discharge section 8, impeller 9, centralizing block 10, bridge connection joint 11, bridge flow channel 12, liquid phase outlet 13, water nozzle 14, Reducer 15, motor 16, pressure-taking pipeline 17, center pipe 18, differential pressure sensor 19, controller 20, external cable joint 21, lower joint 22.
[0036] The upper end of the outer cylinder 5 is connected to the upper joint 1 by threads, and a sealin...
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Abstract
The invention belongs to the technical field of oilfield exploitation, and discloses an downhole double-cylinder single-stage adjustable gas-liquid separator, which is composed of an outer cylinder and an inner cylinder nested in each other, and an impeller and a liquid discharge section are arranged inside the inner cylinder; A separation baffle is set under the gas phase outlet on the top of the outer cylinder, a gravity separation chamber is set between the inner cylinder and the gas phase outlet; Pressure difference, and compare the real-time measured pressure difference with the set pressure difference, and drive the motor to control the size of the liquid phase outlet through the comparison result. The present invention realizes the primary separation through the cooperation of the impeller and the liquid discharge section, and realizes the secondary separation by relying on the gravity separation chamber; realizes the three separations by using the separation baffle; organically combines the three separation principles of centrifugal separation, gravity separation and collision separation, and the volume Small and compact, it can achieve efficient separation of gas-liquid mixtures under wide gas-phase and liquid-phase processes.
Description
technical field [0001] The invention relates to the technical field of oilfield exploitation, in particular to a downhole gas-liquid separation device. Background technique [0002] Offshore oilfields with high gas-liquid ratio oil wells (gas content > 60%) face problems such as low lifting efficiency of conventional electric pump wells, and in severe cases, "gas lock" occurs, which affects the normal production of oil wells. At present, there are three commonly used lifting methods for oil wells with high gas-liquid ratio in offshore oilfields: 1) Conventional gas-liquid separator is suitable for well conditions where the gas content at the pump suction inlet is less than 30%; 2) The gas separation master can handle the pump suction inlet For well conditions with a gas content of 30%-50%, the separation efficiency drops significantly when the gas content increases; 3) The gas processor compresses the gas and dissolves it in crude oil through downhole pressurization, whic...
Claims
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IPC IPC(8): E21B43/38B01D19/00
CPCB01D19/00E21B43/38
Inventor 郑春峰杨万有刘敏沈琼薛德栋张凤辉程心平任维娜赵景辉李昂缪油花
Owner CHINA NAT OFFSHORE OIL CORP