Pulsating pressure driving self-balancing piston pump drain device and technological method thereof

Abstract

The invention discloses a pulsating pressure driving self-balancing piston pump drain device and a technological method thereof. The device comprises a ground combination device and a down-hole string combination device, wherein the ground combination device comprises a pulse reverse phase double cylinder piston pump, a Christmas tree, a wellhead hydraulic control valve and a metering device, and the down-hole string combination device comprises a sieve tube, a packer and a balance type piston pump. The technological method is that (1) the down-hole string combination device is placed into a shaft and seals the packer; (2) the shaft is filled, and the packer is subjected to pressurizing and seal checking; (3) the wellhead Christmas tree is mounted; (4) an oil jacket annulus and an oil pipe are filled from a fluid replacement opening and a paraffin valve respectively; (5) the pulse reverse phase double cylinder piston pump is started for drainage. According to the pulsating pressure driving self-balancing piston pump drain device, the drainage power of the balance type piston pump comes from pulsating pressure transmitted by the oil jacket annulus, so that rapid and continuous liquid drainage is realized after well production test, flow inducing, production finding and oil-water well acidification fracturing, the stratum is prevented from being damaged, the effect is good, and the efficiency is high.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas development, in particular to a pulsating pressure-driven self-balancing piston pump liquid discharge device and a process method thereof. Background technique [0002] Drainage during oil testing is an important means to confirm the fluidity of formation fluid production and obtain production capacity; after acidification and fracturing of oil and water wells and other measures, it is also necessary to drain fluid in time to prevent the formation fluid from harming the formation. Therefore, liquid drainage is an important process in downhole operations in oil and gas fields. At present, the technological methods used for liquid drainage in downhole operations mainly include hydraulic pumping, tubing pumps, gas lift and screw pumps, hydraulic piston pumps, and jet pumps. The main problems are: the pollution of pumping and drainage is serious, and the human factors are more influ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a pulsating pressure-driven self-balancing piston pump liquid discharge device and its process method, which overcomes the problems and shortcomings of the existing process technology, and the liquid discharge power of the balanced piston pump comes from The pulsating pressure transmitted through the annulus of the oil casing enables rapid and continuous fluid drainage after the oil testing test induces blowout production and acid fracturing of oil and water wells, avoiding formation damage, good effect and high efficiency

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