Method for detecting position of blocked point of pipeline

Abstract

The invention provides a method for detecting the position of a blocked point of a pipeline. According to the method, a signal receiving device is arranged on the part, exposed out of the ground surface, of a well site oil conveying pipeline, so that sound wave vibration transmitted on the wall of the pipeline can be detected; before a pipe cleaner is launched, a clock circuit of the receiving device and a clock circuit in the pipe cleaner are firstly synchronized; then the vibration starting time of an automatic timing device in the pipe cleaner is set to be once in every 5 minutes; when the pipe cleaner is launched in the pipeline, the pipe cleaner vibrates for once every 5 minutes; meanwhile, the signal receiving device triggers the timing circuit for timing every 5 minutes, and a time period from the starting of timing to the receiving of vibration signals is the transmission time of vibration sound waves in the pipeline; and when delta T of a plurality of times is the same, the pipe cleaner is blocked, and then the distance S can be calculated. By launching the pipe cleaner capable of self-vibrating in the pipeline, the position of the blocked point can be accurately determined, unnecessary working load induced by wrong judgments of errors is avoided so that maintenance and repair work can be easily carried out; failure is enabled to be processed in the shortest time period; and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of pigging equipment, in particular to a method for detecting the position of a pipeline blockage, which is used to indicate the position of the blockage in the pipeline. Background technique [0002] The underground crude oil pipeline between the oil field well site and the station often freezes and blocks in winter. In order to solve the blockage and resume pipeline transportation, the frontline staff need to dig the ground, saw off the pipeline, and flush the pipeline with a high-pressure air pump, but judge the internal blockage of the pipeline. At present, it can only rely on human experience. Misjudgment is inevitable. It often needs to be tried many times. In the wild in the ice and snow, a series of unblocking tasks such as digging out pipelines are extremely difficult, time-consuming and laborious, and it is greatly aggravated by repeated repetitions. The difficulty and hardship of frontline staff. ...

AI Technical Summary

Problems solved by technology

In order to overcome the above problems, the present invention provides a method for detecting the location of pipeline blockages. The present invention accurately judges the location of blockages by putting a self-vibrating pig in the pipeline, and solves unnecessary errors caused by manual judgment errors. The workload makes the maintenance and repair work difficult, ensuring that the fault can be quickly dealt with in the shortest time and improve production efficiency

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