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Journal of Mining Sciences

2016 year, number 3

Down-the-Hole Measurement Tool for Gas Recovery and Coal Permeability

S. V. SERDYUKOV, T. V. SHILOVA, L. A. RYBALKIN
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasnyi pr. 54, Novosibirsk, 630091 Russia
Keywords: угольный пласт, скважина, газодинамические исследования, гидроразрыв, скважинный прибор, coal bed, hole, gas-dynamic research, hydrofracturing, down-the-hole tool

Abstract

A down-the-hole tool has been designed for gas-dynamic research of coal. The tool is manufactured based on the layout of a straddle packer with an adjustable interval. The tool design is suitable for hydrofracturing and gas-dynamic researches using the methods of indicator diagrams and pressure drop and recovery curves in package with relaxation of coal and rock mass by means of radially symmetric loading of hole walls in the hydrofracture interval.