Compound double-acting rod oil well pump and oil production method thereof

Abstract

The present invention relates to a composite double-acting rod oil well pump and an oil production method thereof, wherein the compound double-acting rod oil well pump comprises a sucker rod, a beam type oil well pump, a screw pump driving device, a screw pump, a beam type There is a piston in the pump barrel of the oil well pump, the upper end of the piston is connected with the sucker rod, the upper port of the vertical through hole of the piston is provided with a floating valve, the lower end of the piston is connected with the lead screw of the screw pump driving device, and the pump barrel is provided with a side suction valve. ;The pump cylinder and the outer cylinder of the screw pump are connected by a collar, and the pump drive shaft of the screw pump driving device is connected to the screw; the nut baffle is arranged under the side suction valve, and the lead screw passes through the center of the nut baffle and is inserted into the torque cylinder , no self-locking nut is fixed on the lead screw and is located between the nut baffle and the torque cylinder, the lower end of the torque cylinder is fixed to the pump transmission shaft, and the lower end of the pump transmission shaft is connected to the screw rod. The invention completes two times of oil drawing and two times of oil discharge within the up and down strokes, which greatly improves the liquid production rate of a single well and increases the displacement of the pump.

Description

technical field [0001] The invention relates to an oil well pump used in the field of oil exploitation on an oil field, in particular to a composite double-acting rod type oil well pump and an oil extraction method thereof. Background technique [0002] With the rapid development of my country's national economy, the country's demand for oil and gas resources continues to increase. At present, most of the beam pumping unit pumps are single-acting, that is, one oil pumping or oil discharge process is completed in one stroke, and the displacement is small and the efficiency is low. At the same time, as the oilfield enters the later stage of development, the water content of the oil well gradually increases. In order to stabilize production, each oilfield often adopts the method of increasing the liquid displacement of the oil well pump to increase the daily liquid production of a single well. For this reason, electric submersible pumps and large-diameter tubular pumps are oft...

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Problems solved by technology

[0003] An object of the present invention is to provide a composite double-acting rod type oil well pump, which is used to solve the problem that most of the existing beam pumping unit pumps are single-acting and have a small displacement. , low efficiency, another object of the present invention is to provide this compound double-acting rod oil well pump oil production method

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