Double tube hydraulic jet pump

Abstract

The invention provides a double-pipe hydraulic jet flow pump. In order to overcome the defects that in the use process of the existing jet flow pump, mixed liquid can overflow through an annular gap between an oil pipe and a sleeve pipe, and the sleeve pipe damage can be easily caused. The double-pipe hydraulic jet flow pump comprises an axial through hole and an axial blind hole, wherein the axial through hole and the axial blind hole are communicated through a radial hole, the radial hole is communicated with a three-way mixed liquid discharge hole formed in the lower side of a pump core, the upper end of the axial through hole is fixedly provided with a power liquid pipe joint, the lower end is fixedly provided with a connecting pipe, a fixed valve is arranged at the lower end of the connecting pipe, the upper end of the axial blind hole is provided with an overflow liquid pipe joint, and the pump core is positioned in the power liquid pipe joint and an oil pipe arranged above the power liquid pipe joint. The double-pipe hydraulic jet flow pump has the beneficial effects that the overflow liquid can singly flow out through an overflow liquid pipe, the sleeve pipe can be protected from being much eroded, so power liquid, overflow liquid and gas passages are not mutually interfered, the problem of oil production quantity reduction caused by well bottom liquid accumulation in the later production period of a gas well is solved, and the operation cost is reduced.

Description

technical field [0001] The invention relates to a downhole hydraulic jet pump of an oil and gas exploitation device, in particular to a double-pipe hydraulic jet pump. Background technique [0002] The jet pump is a special type of hydraulic pump. It has no moving parts and relies on the energy conversion between power fluid and formation fluid to achieve oil pumping. It has the advantages of short pump body and large displacement. It can be applied to deep wells and large displacement wells. It has become a relatively mature mechanical oil recovery method in oil and gas extraction. The jet components of the jet pump mainly include nozzles, throats and diffusers, and the power fluid usually comes from above the jet pump. [0003] In the process of oil and gas extraction, downhole fluid accumulation often occurs, and drainage oil (gas) recovery is a major process technology in the later stage of oil and gas extraction. The conventional process of using a jet pump is that th...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the fact that the mixed fluid returns through the annulus of the tubing and the casing during the use of the existing jet pump, it is easy to cause damage to the casing; The eliminated mixed liquid interferes with each other; for gas production wells, the gas easily enters the high-pressure end of the power pump, resulting in the shortcomings of low pump efficiency and high noise of the high-pressure pump. The invention provides a double-tube hydraulic jet pump, which can Effective separation of power fluid and mixed fluid

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