Simple oil field wellhead associated gas collection device and method

Abstract

Provided is a simple oil field wellhead associated gas collection device. The simple oil field wellhead associated gas collection device includes a cover side suction check valve, a cover side exhaustcheck valve, an axis side suction check valve, an axis side exhaust check valve, a steel piston gas cylinder, a piston, a power source, an upper connection rod, a connection rod position adjusting device, a cylinder bottom sewage draining valve, corresponding pipelines and the like, wherein the inlet of the cover side suction check valve is connected with a Christmas tree sleeve pipe outlet sluice valve, and the outlet of the cover side suction check valve is connected with the cover side gas inlet of the steel piston gas cylinder; the inlet of the axis side exhaust check valve is connected with the axis side exhaust hole of the steel piston gas cylinder, and the outlet of the axis side exhaust check valve is connected with the associated gas collection pipeline; a sewage draining port isformed in the bottom of the steel piston gas cylinder, and the cylinder bottom sewage draining valve is mounted at the sewage draining port. The simple oil field wellhead associated gas collection device has the advantages that discharging of pollutants is reduced; the oil field wellhead associated gas collection device is simple in process, convenient to mount, easy to maintain and low in investment and operation cost and can be produced on site; single action and double action can be flexibly switched; the compression ratio is large in range and adjustable; no extra power supply is requiredfor driving; the oil field wellhead associated gas collection device is applicable to continuous, intermittent and other working conditions and is suitable for associated gas collection when sleeve pressure is lower than return pressure.

Description

technical field [0001] The invention relates to oil exploitation technology, in particular to a simple oilfield wellhead associated gas collection device and method. Background technique [0002] Energy shortage is the bottleneck of China's development, and it is also a major strategic issue related to the overall economic and social development of China. An effective way to solve this problem is to increase revenue and reduce expenditure, and the recovery and utilization of oilfield associated gas is an important way to increase revenue and reduce expenditure. [0003] China's oilfields are rich in associated gas resources. According to incomplete statistics, the annual burning of associated gas in some scattered small oil fields due to geographical restrictions is as high as 12×10 8 m 3 Around, equivalent to 12×10 6 t oil. Currently, associated gas collection methods mainly include the following: [0004] (1) Mobile casing gas recovery device. The structure of the m...

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Problems solved by technology

Complex device, high investment, high energy consumption, suitable for oil wells with high production of associated gas

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