Downhole gas-liquid transduction booster pump

Abstract

The invention relates to a downhole gas-liquid transduction booster pump and belongs to the technical field of downhole equipment for petroleum and natural gas exploitation. The booster pump comprises an oil pipe, a packer, a housing, a piston component and a filter, wherein the oil pipe is mounted at the top of the housing; the packer is arranged on the oil pipe; the filter is mounted at the bottom of the housing; a reversing valve is eccentrically arranged in the housing; and the piston component is mounted below the reversing valve. The booster pump is compact in structure, can meet the downhole space requirement, does not need additional power during operation, and can greatly pressurize liquid by virtue of energy provided by gas in an oil-gas well, thereby realizing stable and efficient exploitation of low-pressure and low-yield oil-gas wells, coal gas wells and water-producing gas wells. The booster pump solves the problems of high cost and high energy consumption of water draining and crude oil lifting processes of the conventional technology, and is especially applicable to downhole pressurization operation at different depths in low-yield gas wells, gas-containing oil wells and coal-bed gas wells.

Description

technical field [0001] The invention relates to a downhole gas-liquid energy conversion booster pump, which belongs to the technical field of downhole equipment for oil and gas exploitation. Background technique [0002] Effective lifting of wellbore fluid production is the prerequisite for efficient and stable development of oil and gas fields and coal gas fields; for gas wells or coalbed methane in the middle and later stages, the fluid accumulation in the wellbore will cause the gas-producing layer to be "crushed" and stop production, drainage and gas recovery measures are essential few. At present, drainage gas recovery methods include bubble drainage, gas lift and pumping (rod pump, screw pump and submersible pump) and so on. The foam drainage method is to intermittently or continuously add foam-generating chemical agents from the surface wellhead into the wellbore, so that it mixes with the produced water near the bottom of the wellbore to generate foam, thereby reduc...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a pressurized liquid using the energy of the original gas in the well, so that the wellbore produces liquid "self-spraying", so that no external energy is needed, so as to solve the problem of high cost and energy consumption in the existing process of drainage and crude oil lifting process To achieve the purpose of fully utilizing the natural energy of the reservoir to achieve stable and efficient oil and gas production, and it is suitable for downhole gas-liquid conversion booster pumps of different well depths in low-yield gas wells, gas-bearing oil wells, and coalbed methane wells

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