a. The threaded part of a bit. Long
b. Sometimes incorrectly used as a syn. for bit blank. Long
A salt lake whose waters contain in solution a high content of sodium
sulfate and lesser amounts of the carbonates and chlorides ordinarily
found in salt lakes; a lake whose water has a bitter taste. Examples
include Carson Lake, NV, and the Great Bitter Lake in Egypt. AGI
a. The bitter liquid remaining after seawater has been concentrated by
evaporation until most of the sodium chloride has crystallized out.
AGI
b. A natural solution, in an evaporite basin, that resembles a saltworks
liquor, esp. in its high magnesium content. AGI
See:epsomite
a. A pure, crystalline dolomite that consists of 1 part or equivalent of
calcium carbonate and 1 part of magnesium carbonate. Syn:pearl spar
Fay
b. See:dolomite
The hydraulic pressure applied to a drill bit when drilling, as shown in
pounds per square inch by the pressure gages on the hydraulic-feed
cylinders of a diamond drill or the total pressure in pounds as calculated
by multiplying the recorded hydraulic pressure by the square-inch area of
the piston in the hydraulic-feed cylinder. Syn:drilling thrust
Long
a. A general name for various solid and semisolid hydrocarbons. In 1912,
the term was used by the American Society for Testing and Materials to
include all those hydrocarbons that are soluble in carbon disulfide,
whether gases, easily mobile liquids, viscous liquids, or solids.
b. A generic term applied to natural flammable substances of variable
color, hardness, and volatility, composed principally of a mixture of
hydrocarbons substantially free from oxygenated bodies. Bitumens are
sometimes associated with mineral matter, the nonmineral constituents
being fusible and largely soluble in carbon disulfide, yielding
water-insoluble sulfonation products. Petroleums, asphalts, natural
mineral waxes, and asphaltites are all considered bitumens. AGI
A cable notable for its resistance to moisture, but not suitable for high
temperatures. The wires are tinned to prevent reaction with the sulfur in
the bitumen. Outside the bitumen are layers of tape and jute, and one or
two layers of steel armoring; outside each layer of steel armoring are
layers of serving compound. Mason
Cannel coal from Torbane, Scotland. See also:torbanite
bituminite.
An old name for mineral coal. Tomkeieff
Yielding or containing bitumen. Standard, 2
High explosive used in mines. Bennett
a. Containing bitumen.
b. Pertaining to bituminous coal. AGI
c. Having the odor of bitumen; often applied to minerals. d. Yielding volatile bituminous matter on heating (for example, bituminous
coal). AGI
e. Containing much organic, or at least carbonaceous, matter, mostly in
the form of the tarry hydrocarbons, which are usually described as
bitumen.
a. Coal that ranks between subbituminous coal and anthracite and that
contains more than 14% volatile matter (on a dry, ash-free basis) and has
a calorific value of more than 11,500 Btu/lb (26.7 MJ/kg) (moist,
mineral-matter-free) or more than 10,500 Btu/lb (24.4 MJ/kg) if
agglomerating (ASTM). It is dark brown to black in color and burns with a
smoky flame. Bituminous coal is the most abundant rank of coal; much is
Carboniferous in age. CF:medium-volatile bituminous coal;
low volatile bituminous coal. Syn:soft coal
b. A coal that is high in carbonaceous matter, having between 15% and 50%
volatile matter. Soft coal. BCI
c. A general term descriptive of coal other than anthracite and
low-volatile coal on the one hand and lignite on the other. BS, 11
d. A coal with a relatively high proportion of gaseous constituents; dark
brown to black in color and burns with a smoky luminous flame. The coke
yield ranges from 50% to 90%. The term does not imply that bitumen or
mineral pitch is present. See also:coking coal
A mixture of bituminous material and fine sand that will flow into place
without mechanical manipulation when heated. ASTM
A dark, dense limestone containing abundant organic matter, believed to
have accumulated under stagnant conditions and emitting a fetid odor when
freshly broken or vigorously rubbed; e.g., the Bone Spring Limestone of
Permian age in west Texas. Syn:stinkstone; anthraconite.
See also:swinestone
Iron ores in which the gangue consists principally of coaly matter; e.g.,
black band ironstone. Osborne
Natural or rock asphalt, but the term is sometimes used to describe a rock
in which the percentage of impregnation is comparatively low.
Nelson
A shale containing bituminous material; coaly shale. CF:oil shale
That portion of the bit between the crown and the shank of the bit.
Long
a. Total weight, in carats, of the diamonds set in a diamond bit.
Long
b. Weight or load applied to a diamond bit during a drilling operation.
See also:bit load