drilling fluid

variants: or drilling mud

Definition of drilling fluid

: a mixture of clay and other chemicals with oil or water that is circulated around the drill bit in oil-well drilling in order to lubricate and cool the bit, flush rock cuttings to the surface, and plaster the side of the well to prevent cave-ins

First Known Use of drilling fluid

1913, in the meaning defined above

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Last Updated

17 Sep 2019

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The first known use of drilling fluid was in 1913

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involving a confidence or trust

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