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A B C D E F G H I J K L M N O P R S T U V W
*This is an abridged version of the Dictionary of Petroleum Terms
provided by Petex and the
University of Texas Austin
© Petex 2001
A
abandon v: to temporarily or permanently cease production from a
well or to cease further drilling operations.
abnormal pressure n: pressure outside the normal or expected
range.
abrasion n: wearing away by friction.
 accumulator
n: the storage device for nitrogen pressurized hydraulic fluid, which is used in operating
the blowout preventers.
acetic acid n: an organic acid compound
sometimes used to acidize oilwells.
acid fracture v: to part or open fractures in
limestone formations by using fluid under hydraulic pressure.
 acidize v: to treat
formations with acid for the purpose of increasing production.
acid stimulation n: a well stimulation method
using acid. See acidize.
aeration n: the introduction of air or gas into
a liquid.
AESC Association of Energy Service Companies n:
a trade association that represents the interests of members of the energy service segment
of the oil and gas industry. It offers publications regarding recommended industry
practices and training materials.
 air hoist n: a hoist
operated by compressed air; a pneumatic hoist. Air hoists are often mounted on the rig
floor and may be used to lift joints of pipe and other heavy objects.
ANSI American National Standards Institute n: a
non-profit organization (501(c)3) that administers and coordinates voluntary
standardization and conformity assessment system.
API American Petroleum Institute n: a trade association and
standards organization that represents the interests of the oil and gas industry. It
offers publications regarding standards, recommended practices, and other industry related
information.
IADC International Association of Drilling Contractors
n: a trade association that represents the interests of members of the drilling segment of
the oil and gas industry. It offers publications regarding recommended industry practices
and training materials.
 annular blowout preventer
n: a well control device, usually installed above the ram preventers, that forms a seal in
the annular space between the pipe and well bore or, if no pipe is present, over the well
bore itself.
annular pressure n: pressure in an annular
space.
 annulus n: the space around a
pipe in a well bore, sometimes termed the annular space.
API-monagram adj; the logo of the American
Petroleum Institute (API) that is placed on certain pieces of oilfield equipment by the
equipment manufacturer. API licenses the use of the monogram on equipment that meets the
API's minimum standards. It offers publications regarding standards, recommended
practices, and other industry related information. Address: 1220 L Street NW; Washington,
DC 20005; (202) 682-8000
artificial lift n: any method used to raise oil
to the surface after a well ceases to flow.
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