wash boring

noun

Definition of wash boring

: a boring system by which material loosened by a bit is borne to the surface in the annular space between the bit and casing by water forced down through the pipe bearing the bit

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“Wash boring.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/wash%20boring. Accessed 7 Aug. 2020.

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