The invention provides an
oil well casing gas collecting device. An oil pumping
pipe, an oil pumping rod and a casing are arranged in an
oil well, the oil pumping rod is connected onto an oil pumping unit, and the oil pumping unit pumps
crude oil from the oil pumping
pipe and transports the
crude oil to an
oil transportation pipe. The device comprises a casing connecting pipe, a one-way valve A, a boosting pump, a one-way valve B and an oil pipe connecting pipe. The boosting pump includes a connecting rod, the upper end of the connecting is fixedly connected with a pressure arm, the upper portion of the oil pumping rod is fixedly connected with a pressure button, and the pressure button is located above the pressure arm. When the boosting pump is installed, the connecting rod is parallel to the oil pumping rod, and the pressure arm is intersected with the connecting rod but is not connected with the connecting rod. When the oil pumping rod is lifted up under the driving of the oil pumping unit, casing gas drives a
piston, the connecting rod and the pressure arm to move upward under the action of self pressure. When the oil pumping rod moves downward under the action of self gravity, the pressure button presses the pressure arm to drive the connecting rod and the
piston to move downward, and compressed casing gas in a compression cylinder enters the
oil transportation pipe. By means of the
oil well casing gas collecting device, a series of problems including difficulty in traditional oil well casing gas recovering, energy waste, environment
pollution, safety
hazard and the like are solved. Therefore, the oil well casing gas collecting device has obvious economic benefit and environmental-protection benefit.