drill string
(on a drill rig) the assemblage of drill pipes that link the drill bit to the mechanism that imparts rotary or reciprocating motion.
[1695-1705]

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Universalium. 2010.

Look at other dictionaries:

  • Drill string — A drill string on a drilling rig is a column, or string, of drill pipe that transmits drilling fluid (via the mud pumps) and torque (via the kelly drive or top drive) to the drill bit. The term is loosely applied as the assembled collection of… …   Wikipedia

  • drill string — (on a drill rig) the assemblage of drill pipes that link the drill bit to the mechanism that imparts rotary or reciprocating motion. [1695 1705] * * * drill string noun A pipe made of metal tubes that forms the bore of a drillhole, esp for oil or …   Useful english dictionary

  • drill string — /ˈdrɪl strɪŋ/ (say dril string) noun the assemblage of equipment for drilling comprising items as rods, bits, etc …   Australian English dictionary

  • Drill string compensator — active heave compensator redirects here. For other uses, see active heave compensator (disambiguation). A drill string compensator decreases the influence of the heave of a drilling vessel on the drill bit. Drill string compensators are also… …   Wikipedia

  • Drill line — …   Wikipedia

  • Drill pipe — Drill pipe, is hollow, thick walled, steel piping that is used on drilling rigs to facilitate the drilling of a wellbore and comes in a variety of sizes, strengths, and weights but are typically 30 to 33 feet in length. They are hollow to allow… …   Wikipedia

  • Drill bit (well) — A Drill bit, is a device attached to the end of the drill string that breaks apart, cuts or crushes the rock formations when drilling a wellbore, such as those drilled to extract water, gas, or oil. The drill bit is hollow and has jets to allow… …   Wikipedia

  • Drill floor — The Drill Floor is the heart of any drilling rig and is also known as the pad. This is the area where the drill string begins its trip into the earth. It is traditionally where joints of pipe are assembled, as well as the BHA (bottom hole… …   Wikipedia

  • Drill bit — For the fictional character, see Drill Bit (Transformers). For the cancelled skyscraper nicknamed Drill bit, see Chicago Spire. For the types used in drilling wells, see Well drilling. From top to bottom: Spade, lip and spur (brad point), masonry …   Wikipedia

  • Drill — For other uses, see Drill (disambiguation). Drill scheme A drill or drill motor is a tool fitted with a cutting tool attachment or driving tool attachment, usually a drill bit or driver bit, used for drilling holes in various materials or… …   Wikipedia

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