drilling mud
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noun
a water-based or oil-based suspension of clays pumped into an oil well during drilling in order to seal off porous rock layers, equalize the pressure, cool the bit, and flush out the cuttings.
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Also called drilling fluid.
Words nearby drilling mud
drill bit, drill chuck, drill corps, drill down, drilling, drilling mud, drilling platform, drilling rig, drillmaster, drill pipe, drill press
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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British Dictionary definitions for drilling mud
drilling mud
noun
a mixture of clays, water, and chemicals pumped down the drill string while an oil well is being drilled to lubricate the mechanism, carry away rock cuttings, and maintain pressure so that oil or gas does not escape
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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