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drill string

American

noun

(on a drill rig) the assemblage of drill pipes that link the drill bit to the mechanism that imparts rotary or reciprocating motion.

drill string British

noun

(in the oil industry) a pipe made of lengths of steel tubing that is attached to the drilling tool and rotates during drilling to form a bore

"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

Etymology

Origin of drill string

First recorded in 1695–1705

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Workers in Midland, Tex., with a pipe to be lowered into the drill string of an oil rig that was boring to a depth of nearly 11,000 feet.

From New York Times • Mar. 23, 2012

This is used in lieu of spinning the entire drill string.

From Forbes • Jan. 15, 2012

For years, the industry standard had moved to every 14 days or so to pull up the drill string and test everything.

From Forbes • Nov. 6, 2011

In round numbers, 1400’ of drill string remains to be extricated from the wellbore.

From Forbes • May 24, 2011

The drill string became stuck in the hole.

From Forbes • May 24, 2011

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023