Oil producing well casing gas recovery device

Abstract

The invention relates to the field of oil producing well casing gas recovery, in particular to an oil producing well casing gas recovery device. The device comprises a liquid storage unit, a control unit is arranged on the upper end face of the liquid storage unit, an output unit is arranged at one side of the liquid storage unit, an energy storage unit is arranged at the upper portion of the control unit, and an energy-saving unit is arranged at the upper portion of the energy storage unit. A three-stage settling tank is adopted, gas-liquid separation in casing gas is achieved, a pressure pump is arranged to enable casing gas and liquid in a third collecting tank to have pressure, and higher efficiency is obtained during recycling; a thermoelectric generator and a liquid conveying pipe are arranged, compressed casing gas is converted into electric energy to be stored through a storage battery, external equipment is connected, the use range of the casing gas is widened, and energy conservation and emission reduction are achieved; and a solar panel is adopted to realize environmental protection, and an inverter is arranged to change the electric energy voltage generated by the solar panel and the thermoelectric generator according to requirements, so that the output electric energy obtains a wider application range under the action of the inverter.

Description

technical field [0001] The invention relates to the field of oil production well casing gas recovery, in particular to an oil production well casing gas recovery device. Background technique [0002] An oil well generally includes two parts, the oil pipe and the casing. The oil pipe is used to transport fluid to the ground under the action of the pump, and the casing is set outside the oil pipe to support the wall of the oil well. At the bubble point pressure of the fluid pressure in the oil well, the fluid in the oil well will produce separated gas and enter the casing. This part of the gas is called casing gas. With the increase of the separated gas generated by the fluid in the oil well, the pressure of the casing gas If the pressure of the casing gas is too high, the gas lock phenomenon will occur in the oil well, so that the pump cannot collect the oil well fluid normally. Therefore, it is necessary to discharge the casing gas regularly to reduce its pressure. [0003]...

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Problems solved by technology

[0003] At present, the commonly used method for oil wells is to discharge directly to the air. Since the main components of casing gas are methane, carbon monoxide, hydrogen sulfide and other compounds, this method not only pollutes the environment, but also causes a lot of waste of resources. Another method is to combine casing and The tubing is directly connected, and the casing gas is directly discharged into the tubing. This method cannot completely discharge the casing gas due to the influence of the back pressure of the tubing. Therefore, a casing gas recovery device for oil production wells is needed.

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