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Name   Other Well-Drillers, Borers and Related Workers Number 71390 Description This group includes well-drillers, borers and related workers not elsewhere classified, for example those who specialise in operating plant to prepare drilling fluid by mixing clay, sand and water to specified viscosity and pumping it into a borehole; using special test equipment to determine productivity of strata; or starting or renewing flow of oil or gas from well by means of explosives. List similar descriptions Search for Images Search Encyclopedia Contact Copyright © 2024 IISH Amsterdam