A Monitoring System for Obstruction of Exploration Pipe Used in Well Logging

Abstract

The invention relates to a system for monitoring resistance encountering of an exploration pipe for logging. The system comprises a winch; the winch is connected with the exploration pipe through a cable, a control circuit is connected between the exploration pipe and the winch, and a monitoring device connected with the control circuit is arranged in the exploration pipe; the monitoring device comprises an acceleration sensor and a microcontroller; and the acceleration sensor is used for acquiring the motion state of the exploration pipe, the microcontroller is used for judging whether the motion of the exploration pipe is stopped or not, and the control circuit is used for controlling the winch to stop running when the exploration pipe stops moving. According to the system for monitoring resistance encountering of the exploration pipe for logging, the problem that the mode of observing and judging whether the exploration pipe encounters resistance manually in a traditional well logging system is not accurate is effectively solved, and the situation that the cable is stacked and wound under a well due to the fact that the exploration pipe encounters resistance when put down is effectively prevented.

Description

technical field [0001] The invention relates to the field of well logging, in particular to a monitoring system for detecting obstructions in well logging. Background technique [0002] Well logging, also called geophysical logging, is a method of measuring geophysical parameters using the electrochemical properties, electrical conductivity, acoustic properties, radioactivity and other geophysical properties of rock formations. The logging system is to detect and monitor these geophysical properties. Measuring device. [0003] There are two main accidents in the logging process. One is the blockage when lifting the probe, which is caused by factors such as drilling block and diameter shrinkage; the other is the blockage when lowering the probe. Stopping the cable will cause the cable to accumulate, tangle, and knot in the well, and even cause the cable to be scrapped. [0004] The current logging system relies on manual observation of the lowering of the cable to determine...

AI Technical Summary

Problems solved by technology

[0003] There are two main accidents in the logging process. One is the blockage when lifting the probe, which is caused by factors such as drilling block and diameter shrinkage; the other is the blockage when lowering the probe. Stop laying the cables, which will cause the cables to accumulate, tangle, and knot in the well, and even cause the cables to be scrapped

[0004] The current logging system relies on manual observation of the lowering of the cable to determine whether the probe is obstructed. This method has the disadvantage of strong subjectivity, and it is impossible to accurately know whether the probe will slow down or stop when encountering obstruction. , Only when the resistance is obvious, can the detection pipe be found to be blocked, and then control the winch to stop the lowering of the cable. If the stop is not timely enough, the cable will still be accumulated and entangled in the well

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