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INF 026

An Investigation of the Grindability of Alberta Subbituminous Coals

Several extensive studies were carried out with a view to having a method of determining the grindability of coal adopted as a standard method by A.S.T.M. Eventually, in 1951; the Hardgrove test (1) was adopted by the A.S.T.M. as the sole standard ... Show Abstract

Jensen, E.J.  Fryer, J.F.  1958-01-01

INF 033

Alberta Subbituminous Coals as Drilling Fluid Thinners

Except in a few instances where suitable substitutes are locally available, this material is made from carefully specified bentonites and serves to counteract hole pressures, to lubricate drill bits, to remove cuttings, and to seal borehole walls.In ... Show Abstract

Jensen, E.J.  1961-01-01

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