Underground gas-liquid separation device suitable for shale oil pumping unit oil extraction system
An oil production system and pumping unit technology, which is applied in the fields of fluid production, earthmoving, wellbore/well components, etc., can solve problems such as increased demand, and achieve the effects of reducing impact, facilitating installation, and reducing occupied space.
Active Publication Date: 2021-06-22
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology
At present, there are few reports on the downhole degassing cyclone separation device that can work in conjunction with the pumping unit, and the demand is gradually increasing. Therefore, it is necessary to develop a downhole degassing cyclone separation device that can work in conjunction with the pumping unit
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[0040] The present invention will be further described below in conjunction with accompanying drawing:
[0041] This type is suitable for the downhole gas-liquid separation device of the shale oil pumping unit oil production system. cone, base.
[0042] The two ends of the liquid flow collection cover are concentrically stacked structures of cylinders with different diameters, and there is a bridge channel inside to allow the gas phase to be discharged to the annular area of the oil jacket. The main structures include packer connecting threads, degassing bridge channels, liquid The connection thread of the flow separation cylinder, the connection thread of the air guide pipe, and the connection thread of the packer are connected with the packer through threads in the downhole, so that the whole device runs under the protection of the packer, and the degassing bridge channel is inside the liquid flow collection cover The gas phase can be guided from the side and discharged t...
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The invention provides an underground gas-liquid separation device suitable for a shale oil pumping unit oil extraction system. The problem that the efficiency of a pumping unit is low under the gas-containing condition in the shale oil extraction process is mainly solved. The underground gas-liquid separation device is characterized in that a liquid flow collecting cover, a gas guide pipe, a liquid flow separation barrel, a spiral runner, a cyclone shell, a deposition cavity shell, a cyclone protection cover, an inverted cone and a base are arranged in the underground gas-liquid separation device; and extracted liquid enters from a liquid inlet, separated gas is exhausted out of an oil sleeve annulus, and a liquid phase enters a deposition cavity and is lifted to the ground through the pumping unit. According to the gas-liquid separation device, the influence caused by the fact that a large number of gas phases are lifted to the ground in the shale oil extraction process can be eliminated, the work efficiency of the pumping unit is improved, and abnormal abrasion caused by long-term gas phase extraction of the pumping unit is avoided.
Description
technical field [0001] The invention relates to a downhole gas-liquid separation device suitable for a pumping unit oil recovery system in the process of exploiting shale oil in an oil field. Background technique [0002] With the continuous maturity of shale oil extraction technology and the gradual increase in production capacity, the problems faced have also increased. Among them, the problem of associated gas has the greatest impact on the process of shale oil extraction. In the process of shale oil production, the pumping unit is commonly used to lift the production fluid to the surface, and the associated gas will cause the gas to be pumped by the pumping unit before the production fluid, thereby reducing production capacity and accelerating the wear of the pumping unit. At present, there are few reports on the downhole degassing cyclone separation device that can work in cooperation with the pumping unit, and the demand is gradually increasing. Therefore, it is necess...
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Login to View More IPC IPC(8): E21B43/38
CPCE21B43/38
Inventor 邢雷赵立新蒋明虎赵嵘广李金煜刘海龙
Owner NORTHEAST GASOLINEEUM UNIV