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the act of screwing a length of
drill pipe onto a drill string suspended in
a well bore, i e lengthening the drill
string by one section of pipe during a
drilling operation
Pumps
mechanical devices to transport liquids
or gases from one vessel to another
along pipelines There are a wide variety
of pumps of three general types reciprocating,
gear and centrifugal The choice
depends on the height to which the liquids
is to be pumped (delivery head),
quantity and nature of the liquid (viscosity,
corrosive nature, etc) and availability
of prime movers (electric motors, turbines,
etc)
Ullage
the quantity a container requires to completely
fill it, i e, the space in the container
remaining above the liquid level
Neutralize
to add an acid to alkali, or vice versa,
until a chemically neutral state exists
Unsaturated hydrocarbon
a hydrocarbon (such as ethene or
ethyne) containing one or more double
or triple carbon-to-carbon bonds in
its molecule
Liner
small-diameter casing that extends into
the production layer from just above the
casing seat and is perforated when production
starts
Insoluble
a solid chemical substance which will not
dissolve in a given liquid over a specified
temperature range
Blowout
the situation that occurs when gas, oil or
salt water escapes in an uncontrolled
manner from a well due either to a release
of pressure in the reservoir rock that the
various containment systems fail to check
or to the failure of the containment systems
during production
Immiscible
incapable of being mixed to form a
homogeneous mixture, e g oil and water
Nonwoven fabric
a fabric made from artificial fibers which
have been meltwelded (melded) together
rather than woven
Show
an indication of oil or gas from an
exploratory well
Refinery
a plant used to separate the various components
present in crude oil and convert
them into usable products or feedstock
for other processes
Oil pipeline
a pipeline used to pump crude or refined
oil between two places, either offshore
or onshore
Petrosulphur compounds
hydrocarbon chemicals which include sulphur
in their molecules, e g mercaptans
Petrochemical
an intermediate chemical derived from
petroleum, hydrocarbon liquids or natural
gas, e g ethylene, propylene, benzene,
toluene and xylene
Spar
a floating on-field storage tank into which
oil flows from a production platform
prior to being transferred to a tanker for
shipping ashore
Petroleum
a generic name for hydrocarbons, including
crude oil, natural gas liquids, natural
gas and their products
Oil
a mixture of liquid hydrocarbons of different
molecular weights
Oil trap
geological structure of any type which
traps migrating hydrocarbons, thereby
causing an oil field to form
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