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drilling mud

noun
1.
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.
Also called drilling fluid.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for drilling mud
  • The next step is to try to staunch the flow proper with drilling mud, a mixture of water and clay minerals.
  • The well has the possibility of spilling natural gas condensate, crude oil and drilling mud.
  • For this purpose, finely-ground barite is added as a weighting agent to drilling mud.
  • It consists of diesel fuel and heavy metals in the pre-shot drilling mud pit.
  • drilling mud or drill cuttings shall not be used as any part of a sealing material for well destruction.
  • drilling mud or drill cuttings are not acceptable as any part of sealing material for well destruction.
  • Some new drilling mud formulations are designed to aid vegetative growth so that the muds can be land-applied.
British Dictionary definitions for drilling mud

drilling mud

noun
1.
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
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for drilling mud

mixture of clay, usually bentonite, and water used primarily in oil, gas, and water-drilling operations to carry rock cuttings to the surface and also to lubricate and cool the drilling bit. Special chemicals are added to the mud to compensate for the varying composition of the water and the formation being drilled and to increase the weight of the column. The drilling mud, by hydrostatic pressure, also helps prevent the collapse of unstable strata into the hole and the intrusion of water from water-bearing strata that may be encountered.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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