Diamond and Drilling Technology Mineral Exploration
J. W. McBean President, Heath & Sherwood Drilling Ltd. G. H. Charlewood Diamond and Drilling Technology Mineral Exploration President, Heath & Sherwood Drilling (Eastern) Ltd ., Kirkland Lake, Ont.
One hundred years after being developed, the diamond drill is still an essential tool in mineral exploration. The basic principle is unchanged, but the technique has been revolutionized, particularly in the past fifteen years. The cost of core drilling has not kept pace with the rising cost of living. The price of machinery, supplies and labour in drilling has doubled and trebled since 1946. Some of the techniques which have made it possible to hold the price line are described.
Canadian Diamond Drilling Association, Canada, drilling fluid, calcium chloride