Scale collecting device and method for gas well and installation method of scale collecting device

Abstract

The invention discloses a scale collecting device and method for a gas well and an installation method of the scale collecting device. The scale collecting device for the gas well comprises a pump pull rod body and further comprises a pipe body used for collecting rust scale falling off from the pump pull rod body, a locker used for fastening the pipe body and a liquid outlet disc used for liquid outlet, wherein the pipe body is a screen pipe with a liquid passing function; and a containing space is formed between the screen pipe and the pump pull rod body. The scale collecting device has the beneficial effects that the structure is simple, installation is convenient, the rust scale falling off from the inner wall of an oil pipe and a sucker rod during pump stopping can be effectively collected into the device, and the phenomenon that the rust scale falls off and blocks a pump opening, and consequently the pump is stuck is avoided; and when the pump works, liquid / gas, various mineralizers and rust scale impurities in the well can be lifted to the ground through the liquid outlet disc, continuous use can be achieved, the production cost is low, and economic benefits are high.

Description

technical field [0001] The invention relates to the technical field of coal bed gas, in particular to a coal gas well scale collection device and a scale collection method using the device. Background technique [0002] In the prior art, during the development of coalbed methane wells, the downhole medium will transfer with the minerals, thereby forming rust, which adheres to the sucker rod and the inner wall of the tubing. The specific gravity is large, the hydraulic pressure in the well is insufficient, and the lifting force of the pump cannot effectively carry the rust to the ground. Once the collection equipment stops, the rust will fall back, bury the pump port, cause the pump to get stuck, and cause large economic losses. [0003] The Chinese invention patent with the application number: 200920109356.3 discloses a tubular pump descaling device, which is applied to the anti-scaling of oil production tubular pumps in oil fields. It consists of the upper part of the pump ...

AI Technical Summary

Problems solved by technology

However, this type of tube pump descaling device has a relatively complicated structure and cumbersome installation process. It can only store the rust in the device, and cannot take the rust out of the well. It cannot be used continuously, and the economic benefit is low.

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