In a furnace, a taphole from which the iron is so pasty that it does not
run freely. Fay
a. A sticky or slippery mixture of water and silt- or clay-sized earth
material, with a consistency ranging from semifluid to soft and plastic; a
wet, soft soil or earthy mass; mire, sludge. AGI
b. An unconsolidated sediment consisting of clay and/or silt, together
with material of other dimensions (such as sand), mixed with water.
AGI
c. A suspension made by mixing the drill circulation fluid (water) with
the fine cuttings produced by the bit when drilling a borehole.
Long
A diamond-point bit with the wings of the point twisted in a shallow,
augerlike spiral. Also called clay bit; diamond-point bit.
See also:mud bit
An instrument used to measure the density of drill mud. BS, 9
a. A double-tube core barrel with a greater-than-normal clearance between
the inner and outer tubes, for use with mud-laden circulation liquids.
Long
b. A bailing device to bring to the surface the cuttings formed by the
action of the bit at the bottom of a borehole in free-fall or churn
drilling. Long
c. A small bailer. Long
The belt of marine deposits composed largely of detrital clay, and lying
between the coarser terrigenous sediments to the landward and the deep
oceanic organic oozes on the seaward side. At present, the inner boundary
of the inner mud belt is the edge of the continental shelf. AGI
A pointed-edge, chisellike tool used for boring drill holes through clay
or claylike overburden materials. Also called clay bit; diamond-point bit.
See also:mud auger
In this method, sticks of explosive are stuck on the side of a boulder
with a covering of mud, and when detonated, very little of the energy of
the explosive is used in breaking the boulder. Higham
The bucket attached to a dredger. Standard, 2
The material filling the cracks, crevices, pores, etc., of the rock or
adhering to the walls of a borehole. The cake may be derived from the
drill cuttings, circulating drill mud, or both; it is formed when the
water in the drilling mud filters into porous formations, leaving the mud
ingredients as a caked layer adhering to the walls of the borehole.
Syn:cake; mud wall cake. Long
A charge of dynamite, or other high explosive, fired in contact with the
surface of a rock after being covered with quantity of wet mud, wet earth,
or sand, no borehole being used. The slight confinement given the dynamite
by the mud or other material permits part of the energy of the dynamite
being transmitted to the rock in the form of a blow. A mudcap may be
placed on top or to one side, or even under a rock, if supported, with
equal effect. Also called adobe; dobie; sandblast.
Method for blasting rock without drilling, in which an explosive is placed
on top of the rock and covered by a cap of mud or earth.
Syn:adobe charge
See:mud crack
The length in feet (meters), as measured from the bottom of a borehole of
a drill-mud liquid standing in a borehole either while being circulated
during drilling operations or when the drill string is not in the hole.
Syn:column of mud
a. The filling of desiccation cracks in mud, customarily in sandstone;
generally preserved as raised ridges (casts) arranged in polygonal
patterns on the underside of a sandstone bed. Pettijohn, 1
b. An irregular fracture in a crudely polygonal pattern, formed by the
shrinkage of clay, silt, or mud, generally in the course of drying.
Syn:sun crack; mud cast; shrinkage crack; desiccation crack.
AGI
Filling voids with clay in limestone from which sulfur has been extracted.
Bennett
In petroleum production, commonly thought of as reduced productivity
caused by the penetrating, sealing, or plastering effect of a drilling
fluid. Actually there is little penetration into the capillaries of an
ordinary producing formation, and a slight amount of differential back
pressure will remove even thick filter cakes. Brantly, 1
A general term for a mass-movement landform and a process characterized by
a flowing mass of predominantly fine-grained earth material possessing a
high degree of fluidity during movement. The water content of mudflows may
range up to 60%. With increasing fluidity, mudflows grade into loaded and
clear streams; with a decrease in fluidity, they grade into earthflows.
Syn:lahar
An apparatus for pushing a clay stopper into the taphole of a blast
furnace. A steam cylinder operates a plunger inside a steel tube into
which clay is fed from a hopper tube as the plunger is worked back and
forth, and is thus forced into the taphole at the end of a cast.
See also:clay gun
a. A pump used to circulate mud-laden drill fluid during borehole drilling
operations. See also:mud pump; sludge pump. Long
b. Pressure tunnel worker.
c. A machine for the disintegration of dry or moist plastic clay. It
consists of a rotating swing hammer operating close to a series of anvils
linked together to form a steeply inclined slat conveyor. Dodd