Caisson type underwater gas-liquid separator

Abstract

The invention discloses a caisson type underwater gas-liquid separator comprising a gas-liquid cyclone separator body and a caisson type slug flow catcher. The gas-liquid cyclone separator body is communicated with at least two feeding pipelines. The feeding pipelines and the gas-liquid cyclone separator body are arranged in an inclined mode. The gas-liquid cyclone separator body is provided with a gas phase outlet and a liquid phase outlet. The bottom of the gas-liquid cyclone separator body is communicated with the caisson type slug flow catcher. The bottom of the caisson type slug flow catcher is provided with an electric submersible pump. The electric submersible pump is connected with the motor. An outlet of the electric submersible pump is connected with a liquid conveying pipe. The liquid conveying pipe penetrates through the caisson type slug flow catcher and the gas-liquid cyclone separator body in sequence and is communicated with the liquid phase outlet in the gas-liquid cyclone separator body. According to the caisson type underwater gas-liquid separator, due to the fact that the slug flow catcher installed in a caisson type is in butt joint with the efficient gas-liquid cyclone separator body, the manufacturing difficulty of the separator is greatly reduced, and the underwater installation difficulty is also reduced.

Description

technical field [0001] The invention relates to a caisson type underwater gas-liquid separator. Background technique [0002] In the development of deepwater underwater oil and gas fields, the standpipe will generate a large back pressure. If this back pressure is not eliminated, the production of the oil well will be seriously affected; in addition, if the gas-liquid separation is not performed after the manifold, then there may be a Generates slug flow in the riser section as high as the riser height. Therefore, a well-designed subsea separator device can not only significantly increase oil well production, but also play a role in flow protection. [0003] The structure design of the existing traditional gas-liquid separator is carried out according to the requirements of API12J. This kind of separator adopts the principle of gravity to separate the gas and liquid, and the liquid level and pressure in the separator are adjusted through the opening of the liquid level regu...

AI Technical Summary

Problems solved by technology

This kind of separator is a very stable and reliable design solution for land applications. However, due to the environmental characteristics of high underwater internal and external pressure, if the traditional separator is designed according to the traditional separator, the volume of the separator will be very large, and the manufacturing cost and installation cost will also increase. very high

In addition, there is no industrialized continuous action underwater regulating valve available in the world at present.

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