reciprocating of drill string

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• 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 — (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] * * * …   Universalium

• Reciprocating saw — Example of a variable speed, reciprocating saw …   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

• 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

• Bow drill — Bow Bow (b[=o]), n. [OE. bowe, boge, AS. boga, fr. AS. b[=u]gan to bend; akin to D. boog, G. bogen, Icel. bogi. See {Bow}, v. t.] [1913 Webster] 1. Anything bent, or in the form of a curve, as the rainbow. [1913 Webster] I do set my bow in the… …   The Collaborative International Dictionary of English

• Drilling rig — For a detailed diagram of a Petroleum drilling rig, see List of components of oil drilling rigs. Drilling rig preparing rock blasting …   Wikipedia

• Mud pump — Mud pumps (blue) in foreground A mud pump is a reciprocating piston/plunger device designed to circulate drilling fluid under high pressure (up to 7,500 psi (52,000 kPa) ) down the drill string and back up the annulus. Mud pumps come in a… …   Wikipedia

• hand tool — any tool or implement designed for manual operation. * * * Introduction  any of the implements used by craftsmen in manual operations, such as chopping, chiseling, sawing, filing, or forging. Complementary tools, often needed as auxiliaries to… …   Universalium

• Saw — For other uses, see Saw (disambiguation). Saw A crosscut hand saw about 620 mm (24 inches) long Classification Cutting Types Hand saw Back saw Bow saw Circular saw …   Wikipedia

• Pumpjack — Nodding donkey redirects here. For the British Rail train, see Pacer (train). Pump jack redirects here. For the Scaffold, see Pump jack. A diagram of a pumpjack. A pumpjack (nodding donkey, pumping unit, horsehead pump, beam pump, sucker rod pump …   Wikipedia