drilling mud

Definitions of drilling mud
  1. noun
    a mixture of clays and chemicals and water; pumped down the drill pipe to lubricate and cool the drilling bit and to flush out the cuttings and to strengthen the sides of the hole
    synonyms: drilling fluid
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    type of:
    lube, lubricant, lubricating substance, lubricator
    a substance capable of reducing friction by making surfaces smooth or slippery
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