Oil field well casing gas recovery device and process

Abstract

The invention relates to an associated gas recovery process in the oil field oil extraction process, in particular to an oil field well casing gas recovery device and an oil field well casing gas recovery process. The process is characterized in that: when a part of oil from a well mouth is connected with an inlet port pipeline of a synchronal rotary compressor through a first-path pipeline with a throttle valve, a ball valve and a filter, the part of the oil from the well mouth of the first-path pipeline enters the synchronal rotary compressor to seal, lubricate and cool the synchronal rotary compressor, the other part of the oil is transported to a downstream pipeline under the action of an oil extractor, and the casing gas of a second-path pipeline is pressurized by the synchronal rotary compressor and is pressed into an oil pipe for transport so as to pressurize and recover the casing gas. The invention provides the oil field well casing gas recovery device and the oil field well casing gas recovery process which can effectively reduce the return pressure of the well mouth, improve oil extraction working conditions and reduce the energy consumption of the oil extractor.

Description

technical field [0001] The invention relates to an associated gas recovery process in the crude oil exploitation process of an oil field, in particular to an oil well casing gas recovery device and process. Background technique [0002] When crude oil is extracted in an oil field, the wellhead is composed of tubing and casing. The crude oil is pumped out of the tubing through the pumping unit, and the associated gas precipitated from the crude oil at the bottom of the oil well is distributed in the casing. This part of the associated gas is called Casing gas. [0003] When the pressure of the casing gas is greater than the oil pressure of the wellhead tubing, the casing gas can directly enter the tubing to be transported with the crude oil. [0004] When the pressure of the casing gas is lower than the oil pressure of the wellhead tubing, the casing gas needs to be pressurized and then pressed into the tubing for transportation. Due to the lack of suitable pressurization te...

AI Technical Summary

Problems solved by technology

[0004] When the casing gas pressure is lower than the oil pressure of the wellhead tubing, the casing gas needs to be pressurized and then pressed into the tubing for transportation. Due to the lack of suitable pressurization technology and equipment, a large amount of casing gas cannot be effectively recycled. Can only be vented after being torched at the wellhead

It not only wastes a lot of precious oil and gas resources, but also increases carbon emissions, seriously pollutes the atmospheric environment, and also affects the safe production of oil wells

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