- المجال: Mining
- Number of terms: 33118
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- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
A borehole-inclination survey method whereby the electrolytic deposition of copper from a solution is used to make a mark on the inside of a metal container. Compare: acid-dip survey.
Industry:Mining
A borehole-reaming device consisting of a bit attached to a ball-and-socket or a knucklejoint member, that in turn is connected to the drill rods and used in borehole-deviation drilling.
Industry:Mining
A borehole-reaming device consisting of a bit attached to a ball-and-socket or a knucklejoint member, that in turn is connected to the drill rods and used in borehole-deviation drilling.
Industry:Mining
A borehole-survey clinometer designed to be inserted between rods at any point in a string of drill rods. Compare: clinometer; end clinometer; plain clinometer; wedge clinometer.
Industry:Mining
A borehole-survey instrument capable of taking and recording a series of inclination and bearing readings on a single trip into a borehole. Compare: single-shot instrument.
Industry:Mining
A boring by a diamond drill or other machine that is made for the purpose of obtaining core samples.
Industry:Mining
A boring rig that combines both churn and shot drillings. The churn drill is used for rapid penetration in barren ground where no core is required. The shot drill is used for taking cores along important rock formations.
Industry:Mining
A boring tower developed by the National Coal Board of the United Kingdom to make test drillings for coal from positions off the coast. When drilling is in progress, the tower is resting on the seabed. The base is divided into four airtight sections, which are filled with water when the tower is in position for drilling. The water is pumped out to give buoyancy when the tower is refloated for towing to a new drilling site. The tower is designed to withstand gales of 80 mph (128 km/h) and waves of 30 ft (9.1 m) from crest to trough, and it can be used in any depth of water up to 120 ft (36.6 m). The overall height of the tower is 189 ft (57.6 m), and its total weight is about 570 st (517 t). It has reached over 3,000 ft (915 m) drilling depth with core recovery. The first borehole was put down in the Firth of Forth, Scotland.
Industry:Mining
