Technical
Thesaurus oil & gas
C
Cable
A rope of wire, hemp, or
other strong fibres.
Cable ( coaxial)
A transmission cable
consisting of two concentric conductors insulated from each other.
Cable-tool drilling
A drilling method in which
the hole is drilled by dropping a sharply pointed bit on the bottom of the
hole. The bit is attached to cable, and the cable is picked up and dropped,
over and over, as the hole is drilled.
Calcarenite
A name suggested by A.W.
Grabau for a "limestone or dolomite com- posed of coral or shell sand or
of sand derived from the erosion of older limestones". Size of particles
range from 1.58 to
Calcium petroleum sulphanates
An important range of
aliphatic sulphur compounds in the form of calcium salts; used in a wide
variety of industrial and manufacturing processes, e.g. as detergents, wetting
agents and rust-inhibitors.
Calibration
Determination of the
accuracy of an instrument by finding its variation from the true measurement.
Caliper
An instrument run on
wireline for detecting and recording the internal condition of a tubing or
casing string.
Caliper log
It is a continuous
presentation of hole size or area vs. depth. The logging device is fitted with
flexible springs which expand to conform with the hole as its diameter varies.
Calorific value
A measure of the amount of
energy that is released in the form of heat when a fuel is burned.
CANOC
Canadian Organising
Committee
Cap rock
An impervious layer of rock
(e.g. shale or evaporite) which overlies a. reservoir rock, thus preventing
hydrocarbons from escaping to the surface.
Capillary action
The rise or depression of
liquids in narrow tubes; the formation of films, drops, bubbles, etc.
Capital
Money and other assets used
to finance investments designed to produce income.
Capping
To install and close a shut-in device on top of a well flowing
uncontrolled.
Carbon
A basic element; occurs in
several forms, e.g. diamonds (white, crystal- line), graphite (soft, flaky,
greasy), coke, charcoal (black, hard, solid). Carbon is the base of all
hydrocarbons, and is capable of combining with hydrogen in almost any
proportion resulting in almost numberless hydrocarbon compounds.
Carbon black
A substantially pure form
of finely divided carbon usually produced from liquid or gaseous hydrocarbons
by controlled combustion with a restricted air supply; used as a filler in the
rubber industry and to manufacture ink.
Carboniferous period
The period of geological
time which began roughly 350 million years ago . and ended roughly 280 million
years ago; the period in which most coal seams originated in
Carried interest
When a company pays for all
or part of a partner's costs during exploration or development, e.g. when
company “carries" a State that retains a participation interest in a
field.
Carrier bar
A horizontally placed bar
with a slot which fits around the polished rod of a pumping well. It is
connected to the cable looped around the horse head of a pumping unit and
positioned below a clamp placed on the polished rod. Via these three parts the
up-and-down movement of the beam is transferred to the rod string.
Carry-over
Liquid droplets entrained
in the gas stream leaving a gas/liquid separator.
Carry-through
Free gas entrained in the
liquid stream leaving a gas/liquid separator.
Cased
Pertaining to a well bore
in which casing is run and cemented. See casing.
Cased hole
A well bore in which casing
has been run.
Cash flow profile
A chart showing expenditure
on a project and income from the project over a period of time.
Casing
The steel pipe that is
cemented into a well to prevent the wall from caving in and stop unwanted
fluids from entering the hole from the surrounding rocks.
Casing centraliser
A device secured around the
casing at regular intervals to centre it in the hole. Casing that is
centralised allows a more uniform cement sheath to form around the pipe.
Casing coupling
A tubular section of pipe
that is threaded inside and used to connect two joints of casing.
Casing elevator
See elevators.
Casing hanger
A casing hanger is a device
which sits in the bowl of a lowermost casing head or an intermediate casing
head to suspend the next smaller casing string securely and provide a seal
between the suspended casing and the casing head bowl.
Casing head
A heavy, steel, flanged
fitting that connects to the first string of casing and provides a housing for
the slips and packing assemblies by which inter- mediate strings of casing are
suspended and the annulus sealed off. Also called a spool. See annular space.
Casing head pressure
The pressure in the annular
space between two casing strings installed in a well as measured at surface.
Casing perforation
The holes that are made in
the liner of a finished well in order to allow oil or gas to flow into the
production tube; generally produced by a series of shaped charges fitted
vertically along a gun-perforator.
Casing seat
The lowest point in a well
at which casing is set.
Casing shoe
See guide shoe.
Casing string
The entire length of all
the joints of casing run in a well. Casing is manufactured in lengths of about
Cat walk
A raised, narrow walkway
between tanks or other installations.
Catalyst
A substance which aids or
promotes a chemical reaction, but does not; itself, enter into the reaction.
Catalytic cracking
The process whereby heavy
hydrocarbon molecules are broken down (cracked) into lighter molecules by
passing them over a suitable catalyst (generally heated). " Catch samples'
, To obtain cuttings for geological information as formations are penetrated by
the bit. The samples are obtained from drilling fluid as it emerges from the
well bore or, in cable-tool drilling, from the bailer. Cuttings are carefully
washed until they are free of foreign matter, dried. and labelled to indicate
the depth at which they were obtained. See bailer, cable-tool drilling and
cuttings.
Catchpot
A vessel inserted in a pipeline
to remove liquid droplets or solid particles which may be entrained in a gas
stream.
Cathead
A spool-shaped attachment
on a winch around which rope for hoisting and pulling is wound. See breakout
cathead and make up cathead.
Cation
Electrified particle having
positive charge that is formed when a neutral atom or group of atoms lose one
or more electrons.
Catline
A hoisting or pulling line
powered by the cathead and used to lift heavy equipment on the rig. See
cathead.
Cavernous formations
A formation having
voluminous voids, usually the result of dissolving by formation waters which
mayor may not be still present.
Caving
Collapse of the walls of
the well bore, also called sloughing.
Cavitation
The formation of space in a
flowing liquid by a fixed object in its path. or a stationary liquid by a
moving object, e.g. behind the blades of an agitator. or in a pump which has
been incorrectly primed.
Cellar
A pit in the ground to
provide additional height between the rig floor and the wellhead to accommodate
the installation of blowout preventers, rat hole, mouse hole, and so forth. It
also collects drainage water and other fluids for subsequent disposal.
Cement
A mixture of calcium
aluminates and silicates made by combining lime and clay while heating. Slaked
cement contains about 62.5 per cent calcium hydroxide, which is the major
source of trouble when cement contaminates mud.
Cement casing
To fill the annulus between
the casing and hole with cement to support the casing and prevent fluid migration
between permeable zones.
Cement channelling
An undesirable phenomenon
that can occur when casing is being cemented in a borehole. The cement slurry
fails to rise uniformly between the casing and borehole wall, leaving spaces
void of cement. Ideally, the cement should completely and uniformly surround
the casing and form a strong bond to the borehole wall.
Cement plug
A column of cement which is
placed in a well bore to seal off undesirable flow from or into porous
formation zones.
Cement slurry
A soupy mixture of water
(or other liquid) and cement. Slurries are thin so they can be pumped and to
enable the cement to penetrate cracks and crevices and to fill all voids.
Cement squeeze
A method whereby
perforations, large cracks. and fissures in the wall of the bore hole are
forced full of cement and sealed off. Often used to repair poor casing
cementations.
Cementing
The application of a liquid
slurry of cement and water to various points inside or outside the casing. See
primary cementing, secondary cementing, and squeeze cementing.
Central meridian
This is the longitude
origin of a Transverse Mercator Grid (also UTM).
Central processing unit (CPU)
In computers in general the
unit that comprises the arithmetic logic unit and the control unit.
Centraliser
A device clamped onto
casing to hold it away from the well bore wall prior to cementing.
Chain
Network of navigation
beacons; examples: Syledis, Pulse 8, Hyperfix, RAGA.
Chain drive
A drive system using a
chain and chain gears to transmit power. Power transmissions use a roller
chain, in which each link is made of side bars, transverse pins, and rollers on
the pins. A double roller chain is made of two connected rows of links, a
triple roller chain of three, and so forth.
Chain tongs
A tool consisting of a
handle and releasable chain used for turning pipe or fittings of a diameter
larger than that which a pipe wrench would fit. The chain is looped and
tightened around the pipe or fitting and the handle is used to turn the tool so
that the pipe or fitting can be tightened or loosened.
Chamber lift
A special form of gas lift
in which gas is injected intermittently to lift the liquid which has filled up
a '.chamber" at the bottom of a well, to the surface.
Changing rams
On rotary drilling rigs,
blowouts are prevented by the device known as the blowout preventer. The
sealing effect of the blowout preventer is accomplished by means of parts
called rams. It is necessary to change the rams when drill pipe or tubing of a
different size than that previously used is put in service.
Chart
Sea-bed map; shows water
depth, obstacles (pipelines, wrecks), sediment nature or features.
Chart (bathymetric)
A topographic chart of the
bed of a body of water, or a part of it. Generally, bathymetric chart show
depths by contour lines and gradient tints.
Chart (nautical)
A chart specifically
designed to meet the requirements of marine navigation, showing depths of
water, nature of bottom, elevations, configuration and characteristics of
coast, dangers and aids to navigation. Also called marine chart, hydrographic
chart, or simply chart.
Chart compilation
The production of a new or
revised map or chart, or portions thereof, from existing maps, aerial
photographs, surveys, new data and other sources or the selection, assembly,
and graphic representation of all relevant information required for the
preparation of a map or chart.
Chart sounding datum
The tidal datum to which
soundings and drying heights on a chart are referred. It is usually taken to correspond
to a low water stage of the tide. Often shortened to chart datum, especially
when it is clear that reference is not being made to a horizontal datum.
Charter-party
An agreement wherein the
shipowner hires his vessel to the charterer subject to certain conditions.
Check valve
A valve that permits flow
in one direction only.
Chemical change
A change in a substance
which has affected its chemical composition.
Chemical reaction
The interaction of two or
more substances when chemical changes take place.
Choke
A gauged restriction
inserted into a fluid flow line in order to restrict the flow rate.
Choke line
An extension of pipe from
the blowout preventer assembly used to direct well fluids from the annulus to
the choke manifold.
Choke manifold
The arrangement of piping
and special valves, called chokes, through which drilling mud is circulated
when the blowout preventers are closed to control the pressures encountered
during a kick. See choke and blowout.
Choke plates
Two circular plates each
with a pair of precise orifices. One plate is fixed in the valve body while the
other rotates through a controlled range to expose all or part of the orifice
flow area.
Christmas tree
An array of pipes and
valves fitted to a production wellhead to control the flow of oil or gas and
prevent a possible blowout.
Christmas tree (marine)
A subsea production system
similar to a conventional land tree except it is assembled complete for remote
installation on the sea floor, with or without diver assistance. The marine
tree is installed from the drilling platform; it is lowered into position on
guide cables anchored to foundation legs implanted in the ocean floor. The tree
is then latched mechanically or hydraulically to the wellhead by remote
control.
Cimmerian unconformity
A period of emergence and
subsequent erosion that occurred at the end of the Jurassic Period and was
followed by further deposition of sediments. See unconformity.
Circulate
To pass from one point
throughout a system and back to the starting point. For example, drilling fluid
is circulated out of the suction pit, down the drill pipe and drill collars,
out the bit, up the annulus, and back to the pits.
Circulate bottoms up
To wash rock cuttings from
the bottom of the hole to the surface by maintaining circulation after halting
the drilling operation. This allows time for the closer inspection of the
cuttings and for a decision as to how to proceed when encountering a certain
formation.
Circulation
The process of continuously
pumping drilling mud down through the drill string and up the annulus during
drilling operations.
City gate
A measuring station, which
may also include pressure regulation, at which a distribution gas utility
receives gas from a natural gas pipeline company or the transmission system.
Clabbered
A slang term commonly used
to describe moderate to severe flocculation of mud due to various contaminants;
also called gelled-up.
Clamp connection
Clamps used instead of
flanges to join and hold wellhead parts together.
Clastic rocks
Sedimentary rocks composed
of fragments of pre-existing rocks. Sand- stone is a clastic rock.
Clean oil
Crude oil containing less
than an agreed percentage sediment and water (BS&W); pipeline oil; oil
clean enough to be accepted by a pipeline for transmission, or by a refinery.
Also called dry oil or dry crude.
Clean-up trip
Running the drill pipe into
the hole for circulation of mud only; to clean the bore hole of cuttings.
Closed in
Refers to a well, capable
of producing, that is shut-in.
Closure
Exists in a reservoir rock
where the shape of the upper surface of that rock is suitable for the trapping
of oil and/or gas.
Cloud point
The temperature at which
paraffin wax begins to crystallise or separate from the solution, imparting a
cloudy appearance to the oil as it is chilled under prescribed conditions.
CNPC
China National Petroleum
Corporation
Coagulation
In drilling-fluid
terminology, a synonym for flocculation.
Coal
A solid fossil fuel
consisting mainly of carbon produced by the compression of decayed plants.
Coal gasification
The manufacture of fuel gas
from coal.
Coal measures
The various strata which
contain seams of coal.
Cocked hat
Triangle on chart, formed
by three position lines that do not cross at one point. Also called triangle of
error.
Coding delay
An arbitrary time delay in
the transmission of pulse signals. In the Loran system this is inserted between
the transmission of master and slave signals to prevent zero or small readings,
and aid in distinguishing between master and slave station signals.
Cohesion
The attractive force
between the same kind of molecules, i.e., the forces which hold the molecules
of a substance together.
Coke
Hard carbon, and other
crude oil impurities, which can form inside furnace tubes, etc.
Colloid
A state of subdivision of
matter which consists either of single large molecules or of aggregations of
smaller molecules dispersed to such a degree that the surface forces become an
important factor in determining its properties. The size and electrical charge
of the particles determine the different phenomena observed with colloids,
e.g., Brownian movement.
Colorimeter
An instrument for
determining the colour of oil products by measuring the percentage transmission
of monochromatic colour through the liquid.
Combination string
A casing string that has
joints of various collapse resistance, internal yield strength, and tensile
strength designed for various depths in a specific well to best withstand the
conditions of that well. In deep wells, high tensile strength is required in
the top casing joints to carry the load, whereas high collapse resistance and
internal yield strength are needed for the bottom joints. In the middle of the
casing, average qualities are usually sufficient. The most suitable combination
of types and weights of pipe helps to ensure efficient production at a minimum
cost.
Coming out of hole
The withdrawing of the
drill string from the well bore.
Commercial field
An oil and/or gas field
judged to be capable of producing enough net income to make it worth
developing.
Compact head
A combined casing/tubing
head which can receive as many as two casing strings plus one tubing string,
allowing normal drilling and completion operation to be completed through one
single blow-out preventer system.
Company representative
An employee of an operating
company whose job is to represent company's interests at the drilling location.
Also called company man.
Compass (fluxgate)
A compass based on the
fluxgate principle (use of wire wound saturable core inductor to measure).
Compass (gyroscopic)
A compass having one or
more gyroscopes as the directive element, and tending to indicate true north.
Also called gyro compass.
Compass (magnetic)
A compass depending for its
directive force upon the attraction of the magnetism of the earth for a magnet
free to turn in an horizontal direction.
Compass bearing
See bearing.
Compatt
Acoustic Computing and
Telemetering Transponder made by Sonardyne. Intelligent acoustic underwater
measuring device that measures to other Compatts and DMTs.
Compensators
Hydraulically operated
equipment that compensates for the upward and downward motion (heave) of a
floating rig or drill ship during drilling operations.
Complete a well
To finish work on a well
and bring it to productive status. See well completion.
Completion
The process by which a
finished well is either sealed off or prepared for production by fitting a
wellhead.
Compound
A mechanism used to
transmit power from the engines to the pump, drawworks, and other machinery on
a drilling rig. It is composed of clutches, chains and sprockets, belts and
pulleys, and a number of shafts, both driven and driving. To connect two or
more power-producing devices (as engines) to run one piece of driven equipment
(as the drawworks).
Compound interest
Interest calculated on the
basis of the principal plus accumulated interest, rather than on the principal
alone.
Compressor
Equipment used to compress
gas for re-injection into a well or for pumping through a pipeline.
Concession
A licence area that is
leased to a company for a given period for exploration and development under
specified terms and conditions.
Concrete platform
A production platform made
of reinforced concrete rather than steel.
Condensates
See liquefied petroleum
gas.
Condenser
Equipment for changing a
material from its vapour state to its liquid state.
Conductivity (thermal)
The rate of transfer of
heat along a body.
Conductor
In an electrical sense, a
body capable of carrying an electric current; in a thermal sense, a body which
will permit heat to flow through it. As a general rule, metallic materials are
good conductors of electricity and heat, while non-metallic materials are poor
conductors or insulators.
Conductor pipe
A short string of
large-diameter casing used to keep the top of the well bore open and to provide
a means of conveying the up-flowing drilling fluid from the well bore to the
mud pit.
Cone penetrometer test
Geotechnical term for a cone
shaped body being pushed into the ground at a constant speed. Also known as
CPT.
Conservation
Regulation of oil and/or
gas production from a reservoir in order to prolong its life and hopefully
recover a larger quantity of the oil or gas in place; re-injection of
associated gas for future use.
Consignee
Person or party to whom
goods are delivered.
Consistency
The viscosity of a
non-reversible fluid, in poises, for a certain time interval at a given
pressure and temperature.
Consortium
A group of unrelated
companies who act together in a particular venture.
Consumables
Materials continuously
required to keep present operations and processes functioning properly (the
"bolts and nuts").
Containment boom
A floating, flexible boom
placed on the surface of the sea in order to contain an oil slick.
Continental shelf
The edge of a continental
mass that lies under the sea in comparatively shallow water (up to a water
depth of
Contour (contour lines)
Line of equal depth drawn
on a map or chart; one way of representing height variations, another being
spot depth charts.
Contour interval
The difference in elevation
between adjacent contours.
Contract depth
The depth of the well bore
at which the drilling contract is fulfilled.
Control
A system of points with
established positions or elevations, or both, which are used as fixed
references in positioning and correlating map features. Control is generally
classified in four orders (with first order denoting highest quality) according
to the precision of the methods and instruments used in establishing it, and
the accuracy of the resultant positions and elevations. Often called basic
control. Regulation or direction of a machine, electronic equipment, etc.; or
the dial. knob. switch. etc. for performing this function. The exercise of
directing influence over the movements of a craft or missile. with particular
reference to changes in direction and speed.
Convection
Transference of heat
through a liquid or gas by the actual movement of the fluid.
Conversion
The process whereby
appliances, furnaces or boilers are modified so that they can burn a different
fuel than that for which they were originally designed
Conversion oil
Feedstock used in the
manufacture of carbon black.
Cool down volume
Volume of LNG required to
cool down tank walls of a vessel prior to loading. This volume then returns to
shore in the gas phase.
Cooler
Equipment used to cool a
stream by giving up heat to a cool water stream. or the atmosphere.
Coordinate (origin of)
The point of intersection
of the coordinate axis, from which the coordinates are reckoned. In
mathematical treaties, this origin is usually given the coordinates 0,0; in
surveying, however, it is standard practice to give this origin, coordinates
having large positive numerical values, thereby avoiding the use of negative
coordinates. Also called point of origin.
Coordinate (system)
A fixed system of lines
used to define the position of a point, line, or plane.
Coordinates
Linear or angular quantities
which designate the position of a point in relation to a given reference
system.
Coordinates (geodetic)
Quantities which define the
horizontal position of a point on the spheroid of reference with respect to the
planes of Geodetic Equator and of a selected Geodetic Meridian. See latitude
(geodetic).
Coordinates (geographical)
A system of spherical
coordinates for defining the position of points on the Earth.
Coordinates (grid)
A plane rectangular
coordinates system based on, and mathematically adjusted to, a map projection,
so that geographic positions in terms of latitude and longitude can be readily
transformed into plane coordinates, and the computation relating to them made
by the ordinary methods of plane surveying.
Coordinates (rectangular)
Coordinates on any system
in which the axes of reference intersect at right angles.
Coordinates (spherical)
A system of polar
coordinates in which the origin is the centre of a sphere and the points all
lie on the surface of a sphere. The polar axis of such a system cuts the sphere
at its two poles.
Copolymer
A polymer manufactured from
two or more different monomers. See butadiene-styrene copolymer.
Core
The cylindrical section of
rock or sediments obtained when a core barrel with an annular bit is withdrawn
from a well during drilling.
Core analysis
Laboratory analysis of a
core sample to determine porosity, permeability, lithology, fluid content,
angle of dip, geological age, and probable productivity of the formation.
Core barrel
The hollow pipe section
above the annular bit that collects and holds a core.
Core catcher
The part of the core barrel
that holds the formation sample.
Core cutterhead
The cutting element of the
core barrel assembly. In design it corresponds to one of the three main types
of bits: drag bits with blades for cutting soft formations; roller bits with
rotating cutters for cutting medium hard i formations; and diamond bits for
cutting very hard formations.
Correction (atmospheric)
The statistical removal of
meteorological effects from mean sea level changes.
Correction (ionospheric)
A correction for errors
introduced by ionospheric refraction occurring when signals travel through the
ionosphere.
Correction of soundings
The correction of the
observed depths for any departure from true depth due to the method of sounding
or to a fault in the measuring apparatus. See also reduction of soundings.
Corrosion
The progressive breakdown
of a metal structure by chemical or electrolytic attack, e.g. rusting.
Cost and freight (C & F)
The type of contract in
which the seller provides the product and the vessel and delivers the product
to the nominated discharge port. See incoterms.
Cost, insurance and freight (C.I.F.)
The type of contract in
which the seller provides the product and the vessel, procures the insurance
and delivers the product to the nominated discharge port. See incoterms.
Counter weight
One of (usually) a set of
weights, attached to the crank or to the tail end of the walking beam, or both,
of a pumping unit, to counter-balance the weight of the sucker rods and part of
the weight of the fluid column above the pump.
Coupling
In piping, a metal collar
with internal threads used to join sections of threaded pipe. In power
transmission, a connection extending longitudinally between a driving shaft and
a driven shaft. Most such couplings are flexible and compensate for minor
misalignment of the two shafts.
Course made good
The resultant horizontal
direction of actual travel. The direction of a point of arrival from a point of
departure.
Coventurer
A person or company joined
with others in a particular venture. See consortium.
CPT
See cone penetrometer test.
Crack a valve
To open a valve so slightly
as to permit a small amount of liquid or gas to pass through.
Cracking
The process whereby
hydrocarbon molecules of high molecular weight are broken down to lighter
molecules.
Crane barge
A barge that carries a
large crane (or cranes) for use in assembling or repairing offshore structures.
Crater (to crater)
Term meaning the hole is
caving in. To crater refers to the results that sometimes accompany a violent
blowout during which the surface surrounding the well bore falls into a large
hole blown in the earth by the force of escaping gas, oil and water. The crater
sometimes covers an area of several hundred feet.
Creep
The process whereby a
pipeline expands and becomes longer due to high pressure or temperature
variation of its contents and thus tends to shift its position on the sea bed.
Cretaceous period
The period of geological
time which began roughly 130 million years ago and ended roughly 60 million
years ago.
Crew
See drilling crew.
Critical pressure
The pressure above which
vapour and liquid of a pure material cannot exist in equilibrium
Critical temperature
The maximum temperature at
which a gas can be liquefied; that is, the temperature above which a liquid can
not exist.
Crooked hole
A well bore that has
deviated from the vertical. It usually occurs in areas where the subsurface
formations are difficult to drill, such as a section of alternating hard and
soft strata steeply inclined from the horizontal.
Cross-talk
Undesirable interference
across the two channels of a side scan sonar, due to above normal signal
strength.
Crown
The uppermost section of a
derrick.
Crown block
The fixed system of pulleys
fitted at the top of a derrick for use in raising and lowering the drill
string, casing etc.
Crude assay
A procedure for determining
the general distillation and quality characteristics of crude oil.
Crude oil
The oil that is produced
from a reservoir (after any associated gas has been removed); often referred to
simply as crude.
Cubic foot
The standard unit used to
measure quantity of gas (at atmospheric pressure); one cubic foot =
Cumulative production
The sum of volume or mass
produced from a well or train or field calculated from the first day of
production until a specified date.
Current
Water or other fluids in
essential horizontal motion. In British terminology, a non-periodical movement
of water, generally horizontally, due to many causes such as different
temperatures and prevalent winds. Some may be temporary, others permanent.
Current meter
An instrument for measuring
the speed of a current. It may also measure direction of flow.
Cuttings
The fragments of rock
dislodged by the bit and brought to the surface in the drilling mud. Washed and
dried samples of the cuttings are analysed by geologists to obtain information
about the formation drilled.
Cyclic
The term applied to an
organic molecule that contains a ring structure (saturated or unsaturated).
Cycloalkane
The cyclic form of an
alkane (e.g. cyclohexane).
Cycloalkene
The cyclic form of an
alkene (e.g. cyclohexene).
Cyclohexane
The cyclic form of hexane;
used as a raw material in the manufacture of nylon.
Cyclone
A vessel used to separate
solids. e.g. dusts, from gases by centrifugal action. Also weather phenomenon.
See tropical cyclone.
Cycloolefin
See cycloalkene.
Cycloparaffin
See cycloalkane.