Combined type double-acting rod type oil well pump and oil extraction method thereof

Abstract

The invention relates to a combined type double-acting rod type oil well pump and an oil extraction method thereof. The combined type double-acting rod type oil well pump comprises a sucker rod, a beam type oil well pump, a screw pump driving device and a screw pump, wherein a piston is arranged in a pump barrel of the beam type oil well pump; the upper end of the piston is connected with the sucker rod; a walking valve is arranged at an upper port of a vertical through hole of the piston; the lower end of the piston is connected with a lead screw of the screw pump driving device; side suction valves are arranged on the pump barrel; the pump barrel is connected with an outer barrel of the screw pump through a coupling; a pump transmission shaft of the screw pump driving device is connected with a screw; a nut baffle is arranged below the side suction valves; the lead screw penetrates through the center of the nut baffle and is inserted in a torque barrel; a self-locking-free nut is fixed on the lead screw and is positioned between the nut baffle and the torque barrel; a pump transmission shaft is fixed at the lower end of the torque barrel; and the lower end of the pump transmission shaft is connected with the screw. Two-time oil suction and two-time oil drainage are finished in an up-down stroke, the liquid production capacity of a single well is greatly increased, and the displacement of the pump is also increased.

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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