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E21B 21/01

Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes

Full Title

Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (freeing objects stuck in boreholes by flushing E21B31/03) > Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes

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