Hydraulically driven coalbed methane well drainage and production tubular pump

Abstract

The invention belongs to the technical field of coal-bed gas exploitation and particularly relates to a hydraulically driven coal-bed gas well discharge and mining tubing pump. The hydraulically driven coal-bed gas well discharge and mining tubing pump comprises an adapter flange joint part, a power cylinder part, a power cylinder plunger pump joint part and a plunger pump part. The power cylinder part comprises a rodless cavity power pipeline, a rod cavity power pipeline, a cylinder bottom, a power cylinder inner barrel, a piston, a piston rod, a guide sleeve and a power cylinder outer barrel, wherein the upper end and the lower end of the power cylinder outer barrel are connected with the adapter flange joint part and the power cylinder plunger pump joint part respectively, the upper end of the power cylinder inner barrel is connected with the cylinder bottom, the lower end of the power cylinder inner barrel is connected with the power cylinder plunger pump joint part through the guide sleeve, the piston rod is in sliding connection with the guide sleeve, the upper end and the lower end of the piston rod are connected with the piston and a plunger of the plunger pump part respectively, and the rodless cavity power pipeline and the rod cavity power pipeline communicate with a rodless cavity and a rod cavity of the power cylinder part. According to the hydraulically driven coal-bed gas well discharge and mining tubing pump, hydraulic rodless discharge and mining are adopted, and the rod and tube eccentric abrasion problem is solved.

Description

technical field [0001] The invention belongs to the technical field of coalbed gas exploitation, and in particular relates to a hydraulically driven coalbed gas well drainage and production tubular pump. Background technique [0002] Coalbed methane drainage is to discharge water from the coalbed methane well through pumping, so that the pressure of the coal reservoir is reduced below the critical desorption pressure of the coalbed methane, so that the adsorbed methane is desorbed into a large amount of free methane and transported to the wellhead. [0003] Coalbed methane mainly exists in mountainous areas. Most of the existing coalbed methane drainage equipment is conventional oil pumping equipment for oil exploitation. It is necessary to build a mining platform on the mountain, which seriously damages the mountain and easily causes disasters such as mudslides and landslides. The available space of the built platform is small. In order to achieve commercial production, a w...

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Problems solved by technology

[0004] In view of the above problems, the object of the present invention is to provide a hydraulically driven coalbed methane well drainage and production tubular pump to solve the problem that the sucker rod in the existing oil pumping equipment is easy to cause eccentric wear and shorten the pump inspection period

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