Hydraulic piston pump lifting system
A hydraulic piston and hydraulic technology, applied in the field of pumping systems, can solve problems such as falling wells, short-circuiting of downhole liquid channels, grinding and breaking production strings, etc., and achieve the effect of improving ultimate recovery rate
Inactive Publication Date: 2014-04-30
北京万普瑞能源技术有限公司
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Problems solved by technology
[0002] In oil and gas production, the conventional piston pump is the most commonly used pumping system, but the outstanding defect of this system is: the mutual friction between the oil rod and the tubing, which will cause the tubing to perforate (wear through) and form a short circuit of the downhole liquid channel. Downhole accidents where the tubing and sucker rods are broken and the production strings fall into the well
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[0012] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0013] Such as figure 1 As shown, the hydraulic plunger pump system of the present invention mainly includes a surface hydraulic power conversion control part, a flexible downhole integrated pipeline part and a downhole hydraulic plunger pump. The main function of the ground hydraulic power conversion control part is to convert the ground high-pressure hydraulic oil power into high-pressure liquid (it can be high-pressure oil, if it is an oil well, the liquid is a mixture of oil and water, if it is a gas well, the liquid is water) medium power output, It provides a hydraulic power source for the reciprocating movement of the downhole hydraulic plunger pump and discharges the downhole produced fluid. The downhole integrated pipeline is a channel for transmitting hydraulic power to the downhole hydraulic plunger pump and a channel for lifting the downhole produced flu...
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The invention relates to a hydraulic piston pump lifting system. The lifting system comprises a subsurface hydraulic plunger pump, a ground hydraulic power conversion control portion for providing a hydraulic power source to the subsurface hydraulic plunger pump and discharging subsurface output liquid, and a flexible subsurface integrated pipeline portion for transmitting hydraulic power to the subsurface hydraulic plunger pump and delivering the subsurface output liquid upwards to a wellhead. The subsurface hydraulic plunger pump comprises a working barrel, a fixed valve mounted at the bottom end of the working barrel, a horizontal partition and a double-piston structure capable of reciprocating in the working barrel. By the lifting system, service life of a subsurface pumping system is prolonged, and pump inspection cycle of oil-gas wells is prolonged; limits of highly-deviated wells and cluster wells to subsurface pump descending depth are removed, self potential productivity of the oil-gas wells can be maximized, and ultimate recovery of oil-gas field development is improved.
Description
technical field [0001] The invention mainly relates to a pumping system for lifting liquid in the production process of oil and gas fields, in particular to a hydraulic piston pump lifting system suitable for the production of highly inclined wells and cluster wells. technical background [0002] In oil and gas production, the conventional piston pump is the most commonly used pumping system, but the outstanding defect of this system is: the mutual friction between the oil rod and the tubing, which will cause the tubing to perforate (wear through) and form a short circuit of the downhole liquid channel. There are downhole accidents in which the tubing and sucker rods are broken and the production string falls into the well. In addition, the ideal working state of the rod pumping system is that the downhole pipe string is all in a vertical state, so the more inclined the wellbore, the more serious the eccentric wear of the pipe and rod during the working process. Rod pump sy...
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IPC IPC(8): F04B47/06E21B43/00
Inventor 潘军里群范龙江
Owner 北京万普瑞能源技术有限公司