Method of determination of the stuck point in drill pipes by measuring the magnetic permeability of the said pipes

摘要

The invention relates to the area of the mining industry, namely, to the area of drill hole survey, and can be used for determination of free or stuck parts of pipes in a drill hole. The implementation of this method is accompanied by registration of the parameter characterizing the condition of the pipe metal and by determination of the free point, based on changes in the value of the above-mentioned parameter. The value of a time-induced decay of the electromagnetic field generated by application of an electric current pulse to the pipe is used as the above-mentioned parameter.