A plunger operating state monitoring device and a monitoring method

By designing a plunger operation status monitoring device, the liquid level, position, and end face status can be monitored in real time, solving the problem of inaccurate judgment of the plunger's falling position and improving the efficiency of shale gas extraction.

CN117365447BActive Publication Date: 2026-07-07PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
PETROCHINA CO LTD
Filing Date
2022-06-29
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Current technology cannot accurately determine the location of the plunger in a gas well, resulting in low extraction efficiency and the possibility of the plunger getting stuck in the tubing string, affecting the normal extraction of shale gas.

Method used

Design a plunger operation status monitoring device, including a liquid level detector, a position detection module and an end face detection module. The device monitors the plunger's operation status downhole in real time through a controller, collects relevant data to determine the falling status and liquid accumulation height, and provides on-site data support.

Benefits of technology

It enables real-time monitoring of the plunger's operating status, accurately determines the drop position and liquid accumulation height, improves liquid drainage efficiency, and ensures normal shale gas extraction and extraction efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a plunger running state monitoring device and a monitoring method, and relates to the technical field of oil and gas exploitation engineering. The monitoring device comprises a pipe plug body, a liquid level detector, a position detection module and an end face detection module. The liquid level detector is installed on the upper end of the pipe plug body. The position detection module is located in the middle part of the pipe plug body and is used for monitoring the position of the pipe plug body in the oil pipe. The end face detection module is located at the lower end of the pipe plug body and is used for detecting whether the pipe plug body reaches the position of the limiting device set distance in the oil pipe. The controller is electrically connected with the liquid level detector, the position detection module and the end face detection module. The controller is adapted with a power module. The running state parameters of the plunger in the well can be collected to accurately determine the running state of the plunger. The monitoring method based on the plunger running state monitoring device can obtain the downhole positioning and record the running state data.
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