Searching for and attempting to recover, by the use of specially prepared
tools, a piece or pieces of drilling equipment (such as sections of pipe,
cables, or casting) that have become detached, broken, or lost from the
drill string or have been accidentally dropped into the hole. AGI
A thread-cutting tool to cut threads inside a casing or other hollow part
that is to be fished from a borehole. Long
Specially shaped steel plates for joining the end of one rail to the next
rail in the track. The fishplates are fixed (one on each side) to overlap
the rail ends and bolted through the rails. Nelson
a. An abrupt and ragged termination of a coalbed that is considered to
have resulted from a washout during the peat stage. The more or less
leathery peat is believed to have been separated parallel to its bedding,
permitting wedges of sand and silt to be forced into the separations in
such a manner that, after the coalification has taken place, a cross
section shows splayed and ragged coal separated by sandstone wedges.
Raistrick
b. The act or process of rotatively drilling a borehole with a fishtail
bit. Also called fishtailing. Long
c. In roll forging, the excess trailing end of a forging. It is often
used, before being trimmed off, as a tong hold for a subsequent forging
operation. ASM, 1
A rotary bit used to drill soft formations. The blade is flattened and
divided, the divided ends curving away from the direction of rotation. It
resembles a fishtail. Also called drag bit. CF:noncoring bit
AGI
A coal seam structure sometimes observed along the fringe of a washout. It
was probably produced by the water forcing open layers of the coaly mass
and the injection of fine sand or silt into the splayed partings--the
veins of coal branching out like a fishtail. Nelson
a. Capable of being easily split along closely spaced planes; exhibiting
fissility. AGI
b. Said of bedding that consists of laminae less than 2 mm thick.
AGI
A general term for the property possessed by some rocks of splitting
easily into thin layers along closely spaced, roughly planar, and approx.
parallel surfaces, such as bedding planes in shale or cleavage planes in
schist; its presence distinguishes shale from mudstone. The term includes
such phenomena as "bedding fissility" and "fracture cleavage." Etymol.
Latin fissilis, that which can be cleft or split. Adj. fissile.
AGI
The spontaneous or induced splitting, by particle collision, of a heavy
nucleus into a pair (only rarely more) of nearly equal fission fragments
plus some neutrons. Fission is accompanied by the release of a large
amount of energy. CF:fusion
Said of nuclei, such as uranium and plutonium, that are capable of
fission. AGI
A fracture or crack in rock along which there is a distinct separation. It
is often filled with mineral-bearing material. See also:fissure vein
AGI
A group of fissures of the same age and of more or less parallel strike
and dip. AGI
A mineral mass, tabular in form as a whole but frequently irregular in
detail, occupying a fracture in rock. The vein material is different from
the country rock and has generally been produced by the filling of open
spaces along the fissure. See also:true vein
Said of a drill hold sufficiently crooked to make a drill stick.
Broadly, a skilled person who can repair and assemble machines in an
engineering shop. Nelson
Hand or bench work involved in the assembly of finished parts by a fitter.
CTD
Auxiliary and accessory tools and equipment needed to drill a borehole
using either percussive, churn, rotary, diamond, or other types of drills.
Long
a. A twinned crystal formed by fivefold cyclic twinning. AGI
b. A crystal twin consisting of five individuals. CF:trilling; fourling;
eightling.
a. A position determined from terrestrial, electronic, or astronomical
data. AGI
b. The act of determining a fix. AGI
c. To fettle or line the hearth of puddling furnace with a fix or
fettling, consisting of ores, scrap, and cinder, or other suitable
substances. Fay
a. The act or process by which a fluid or a gas becomes or is rendered
firm or stable in consistency, and evaporation or volatilization is
prevented. Specif., that process by which a gaseous body becomes fixed or
solid on uniting with a solid body, as the fixation of oxygen or the
fixation of nitrogen.
b. A state of nonvolatility or the process of entering such a state, as
the fixation of a metal or the fixation of nitrogen in a nitrate by
bacteria. Standard, 2
A group name for all authigenic, nonfluid bitumens; divided into stabile
protobitumens and metabitumens. Tomkeieff