- 行业: Mining
- Number of terms: 33118
- Number of blossaries: 0
- 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 procedure for determining the potential productivity of an oil or gas reservoir by measuring reservoir pressures and flow capacities while the drill pipe is still in the hole, the well is still full of drilling mud, and usually the well is uncased. The tool consists of 1000 a packer to isolate the section to be tested and a chamber to collect a sample of fluid. If the formation pressure is sufficient, fluid flows into the tester. Abbrev: DST.
Industry:Mining
A procedure for determining the voltage difference between two points in the ground by balancing against a voltage that is adjusted in phase and amplitude to effect the compensation.
Industry:Mining
A procedure for the determination of the total surface area of a powder or of a porous solid by measurement of the volume of gas (usually N<sub>2</sub>) adsorbed on the surface of a known weight of the sample. The mathematical basis of the method was developed by S. Brunauer, P. H. Emmett, and E. Teller--hence the usual name, B.E.T. method.
Industry:Mining
A procedure used in certain mining activities including strip mining and in some heavy construction work such as channel excavation. Overcasting may be performed in a simple operation consisting of digging out the material, lifting it from one position, moving it over, and dumping it in the spoil position where it remains, for practical purposes, indefinitely. The mechanics of the operation are called "simple overcasting."
Industry:Mining
A procedure used in seismic reflection where reflection times from all traces, or sometimes alternate traces, are plotted at the reflecting point positions (midway between 3343 shot and detector). When no correction has been made for "normal moveout," the plotted times appear to lie along arcs that are convex upward and straddle the shot positions symmetrically. Compare: center-trace time
Industry:Mining
A process (no longer used) to smelt zinc in which roasted zinc ore is mixed with a reducing material, such as coal or coke, placed in cylindrical retorts, and heated in a furnace, such that the escaping zinc vapor is condensed from the open end of the retort.
Industry:Mining
A process by which a protective zinc coating is amalgamated to a base-metal sheet.
Industry:Mining
A process by which coke breeze, coal dust, iron ore, or any other pulverized mineral is bound together into briquettes, under pressure, with or without a binding agent such as asphalt, and thus made conveniently available for further processing or for commercial markets.
Industry:Mining
A process by which fine ores are moistened with water to which a binding medium is added, and the wet mass, without any heating, is rotated in a drum until it forms into spherical lumps of varying size. The moisture is then dried out by evaporation, and the product remains in the form of hard, very porous balls of ore, which are of great reducibility as compared with sintered ore or briquettes.
Industry:Mining
