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OFFSHORE TERMS AND ABBREVIATIONS
 
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Terms

Abandoned Well - an oil well where production has ceased.
Acid Gas - gas with pollutants causing a low pH-value. Creates corrosion problems.
Acidizing - the injection of hydrochloric acid into the production zone in order to stimulate greater
yield. The acid corrodes the sedimentary partitions, thereby increasing permeability.
Aerated Mud - drilling mud mixed with oxygen to increase efficiency.
Anchorhandling Tug - AHT - ship carrying out tasks such as the placing or moving of anchors, as
well as towing drilling installations and barges etc. May double as a supply vessel and is in such
cases termed Anchorhandling Tug/Supply (AHTS).
Anchor Piling - mooring point on the sea bed.
Annular Blowout Preventer - safety valve during drilling operations. Consists of rubber gasket
stopping the flow of mud outside the drill string.
Annulus - the distance between the drill string and the casing or the wall of the drilling hole.
Articulated Platform - or Oscillating Platform - an offshore structure fastened to the sea bed by
means of an articulated hinge, stabilized by buoyancy elements near the surface. Usually used in
connection with loading buoys and flare towers.

Abbreviations

ABS - American Bureau of Shipping - American classification society.
ACOT - Advisory Committee on Offshore Technology
ACP - Area Contingency Plan
ADB - African/Asian Development Bank
AFRA - Average Freight Rate Assessment - average costs for the freight of oil with tankships.
Calculated by the Worldscale Association in London. based on an ongoing registration of all
freightrates at particular points in time.
AHT - Anchorhandling Tug - vessel employed in the offshore field moving anchors and performing
towing operations.
AHTS - AHT which is also a combined supplyvessel.
AID - Agency for International Development - US organization for civilian aid programmes.
AIMS - American Institute of Merchant Shipping - the American shipowners' association for the major
part of the privately owned tonnage.
ALAMAP - Associac?n Latinamericano de Armadores - Latin-American Shipowners' Association
(established in March 1963).
ALU-TUCP - Philippine Seafarers' Union, member of TUCP (Trade Union Council of the Philippines).
AMOSUP - Associated Marine Officers' and Seamen's Union of the Philippines - Filipino union for
officers and crew.
AMVER - Automatic Mutual-Assistance Vessel Rescue System - American warning system for
international shipping.
ASEAN - Association of South East Asian Nations - Indonesia, Malaysia, the Philippines, Singapore.
ASF - Asian Shipowners' Forum - shipowners' association for East Asia and Oceania.
ASO - Arbeidsgiverforeningen for Skip og Offshorefartoyer - The Employers' Organization for Ships
and Offshore Installations (Oslo).
AWES - Association of Western European Shipbuilders

   
 
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