EXPERIENCE OF CASING COLLARS INSTALLATION IN SOIL MASS DURING CONSTRUCTION OF COAL-SEAM DEGASIFICATION WELLS FROM SURFACE
A. S. Kondratenko, A.S. Smolentsev, V. N. Karpov, A. T. Syryamin
Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: Скважина, дегазация, бурение, порционная очистка, одновременная обсадка, Well, degassing, drilling, batchwise cleaning, simultaneous casing
Abstract
The relevance and advantages of borehole drilling technology with simultaneous casing applied to drilling CBM (coal-bed methane) wells from surface in advance of mining are discussed. The description and principle of operation of the equipment used for the casing collar installation in soil mass are given. The practice of batchwise removal of soil plug from the well is described. The results of the study of well drilling in stratified rock masses with bottomhole cleaning are presented.
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