Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
Integral Tank
Definition(s)
Integral Tank
Integral tank means a cargo-containment envelope which forms part of the ship’s hull and which may be stressed in the same manner and by the same loads which stress the contiguous hull structure and which is normally essential to the structural completeness of the ship’s hull. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationIndependent Tank
Definition(s)
Independent Tank
Independent tank means a cargo-containment envelope, which is not contiguous with, or part of, the hull structure. An independent tank is built and installed so as to eliminate whenever possible (or in any event to minimize) its stressing as a result of stressing or motion of the adjacent hull structure. An independent tank is not essential to the structural completeness of the ship’s hull. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationIndependent Tank
Self-supporting tank which does not form part of the vessel's hull and does not contribute to the hull strength. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global StandardsVoid Space
Definition(s)
Void Space
Void space is an enclosed space in the cargo area external to a cargo tank, other than a hold space, ballast space, oil fuel tank, cargo pump-room, pump-room, or any space in normal use by personnel. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationSeparate
Definition(s)
Separate
Separate means that a cargo piping system or cargo vent system, for example, is not connected to another cargo piping or cargo vent system. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationReference Temperature
Definition(s)
Reference Temperature
Reference temperature is the temperature at which the vapour pressure of the cargo corresponds to the set pressure of the pressure-relief valve. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationRecognized Standards
Definition(s)
Recognized Standards
Recognized standards are applicable international or national standards acceptable to the Administration or standards laid down and maintained by an organization which complies with the standards adopted by the Organization and which is recognized by the Administration. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationPump-Room
Definition(s)
Pump-Room
Pump-room is a space, located in the cargo area, containing pumps and their accessories for the handling of ballast and oil fuel. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationPort Administration
Definition(s)
Port Administration
Port administration means the appropriate authority of the country in the port of which the ship is loading or unloading. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationNoxious Liquid Substance
Definition(s)
Noxious Liquid Substance
Noxious Liquid Substance means any substance indicated in the Pollution Category column of chapters 17 or 18 of the International Bulk Chemical Code, or the current MEPC.2/Circular or provisionally assessed under the provisions of regulation 6.3 of MARPOL Annex II as falling into categories X, Y or Z. Source: Resolution MEPC.118(52), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Revised Annex II of MARPOL 73/78), 15 October 2004, International Maritime Organization. Legislation Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime Organization Source: Resolution MEPC.144(54), amendments to the Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (BCH Code), 24 March 2006, International Maritime Organization. Regulatory GuidanceIndependent
Definition(s)
Independent
Independent means that a piping or venting system, for example, is in no way connected to another system and that there are no provisions available for the potential connection to other systems. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationIndependent
For the purposes of paragraph (6) and regulations 19 and 20, a person shall be regarded as independent only where—- his function will not involve the consideration by him of an aspect, of a thing liable to be examined, for which he bears or has borne such responsibility as might compromise his objectivity; and
- he will be sufficiently independent of a management system, or of a part thereof, which bears or has borne any responsibility for an aspect of which he might consider, of a thing liable to be examined, to ensure that he will be objective in discharging his function
Independent
In these regulations, a person is independent in the exercise of a function if— (a) the function does not involve the examination of any thing for which the person has or has had a level of responsibility that could compromise the person’s objectivity; or (b) the function involves the examination of a thing and the person— (i) is sufficiently independent of and separate from the line management of the thing to ensure that the person will be objective in the exercise of his or her function; and (ii) is sufficiently free from any influence that could compromise the person’s independence, including influence of an operational or financial nature. Source: Health and Safety in Employment (Petroleum Exploration and Extraction) Regulations 2013, SR 2013/208, New Zealand, as of May 2013. RegulationsHold Space
Definition(s)
Hold Space
Hold space is the space enclosed by the ship’s structure in which an independent cargo tank is situated. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationFlashpoint
Definition(s)
Flash-point
"Flash-point" of any petroleum means the lowest temperature at which it yields a vapour which will give a momentary flash when ignited, determined in accordance with the provisions of Chapter II and the rules made thereunder. Source: The Petroleum Act, 1934 (Act No. 30 of 1934), India, 1934. LegislationFlashpoint
Flashpoint is the temperature in degrees Celsius at which a product will give off enough flammable vapour to be ignited. Values given in the Code are those for a “closed-cup test” determined by an approved flashpoint apparatus. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationExplosive/Flammability Limits/Range
Definition(s)
Explosive/Flammability Limits/Range
Explosive/flammability limits/range are the conditions defining the state of fuel-oxidant mixture at which application of an adequately strong external ignition source is only just capable of producing flammability in a given test apparatus. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationDangerous Chemicals
Definition(s)
Dangerous Chemicals
Dangerous chemicals means any liquid chemicals designated as presenting a safety hazard, based on the safety criteria for assigning products to chapter 17. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationCofferdam
Definition(s)
Cofferdam
Cofferdam is the isolating space between two adjacent steel bulkheads or decks. This space may be a void space or a ballast space. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationChemical Tanker
Definition(s)
Chemical Tanker
Chemical tanker means a ship constructed or adapted for the carriage in bulk of any liquid product listed in chapter 17 of the International Bulk Chemical Code. <Annex II, Chapter 1, Regulation 1>. Source: Source: Resolution MEPC.118(52), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Revised Annex II of MARPOL 73/78), 15 October 2004, International Maritime Organization. LegislationChemical Tanker
Chemical tanker is a cargo ship constructed or adapted and used for the carriage in bulk of any liquid product listed in chapter 17. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationCargo Service Spaces
Definition(s)
Cargo Service Spaces
Cargo service spaces are spaces within the cargo area used for workshops, lockers and store-rooms of more than 2 m2 in area, used for cargo-handling equipment. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationCargo Pump-Room
Definition(s)
Cargo Pump-Room
Cargo pump-room is a space containing pumps and their accessories for the handling of the products covered by the Code. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationCargo Area
Definition(s)
Cargo Area
Cargo area is that part of the ship that contains cargo tanks, slop tanks, cargo pump-rooms including pump-rooms, cofferdams, ballast or void spaces adjacent to cargo tanks or slop tanks and also deck areas throughout the entire length and breadth of the part of the ship over the above-mentioned spaces. Where independent tanks are installed in hold spaces, cofferdams, ballast or void spaces at the after end of the aftermost hold space or at the forward end of the forward-most hold space are excluded from the cargo area. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationCargo Area
Cargo area is that part of the ship that contains cargo tanks, slop tanks, cargo pump-rooms including pump-rooms, cofferdams, ballast or void spaces adjacent to cargo tanks or slop tanks and also deck areas throughout the entire length and breadth of the part of the ship over the above-mentioned spaces. Where independent tanks are installed in hold. Source: Resolution MEPC.119(52), 2004 amendments to the International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code), 15 October 2004. Regulatory guidance, International Maritime OrganizationCargo Area
Cargo area is that part of the ship that contains cargo holds, cargo tanks, slop tanks and cargo pump-rooms including pump-rooms, cofferdams, ballast and void spaces adjacent to cargo tanks and also deck areas throughout the entire length and breadth of the part of the ship over the above-mentioned spaces. <Chapter II-2, part A, regulation 3>. Source: IMO Resolution MSC.99(73), amendments to the International Convention for the Safety of Life at Sea, 1974, as amended, 5 December 2000, International Maritime Organization. LegislationWorkover
Definition(s)
Workover
Remedial work done to the equipment within a well, the well pipe work, or relating to attempts to increase the rate of flow. Source: IADC UBO / MPD Glossary, December 2011. Global StandardsWorkover
“Workover” means a procedure the operator undertakes that is intended to increase production but is not routine maintenance and includes:- re-entry into the well to drill deeper, to sidetrack to a different location, to recomplete for production or to restore production from a zone that has been temporarily abandoned;
- recompletion by re-perforation of a zone from which gas or oil has been produced or by perforation of a different zone;
- repair or replacement of faulty or damaged casing or related downhole equipment;
- fracturing, acidizing or installing compression equipment; or
- squeezing, cementing or installing equipment necessary for removal of excessive water, brine or condensate from the well bore in order to establish, continue or increase production from the well.
Workover
an operation in which a well is re-entered for the purpose of maintaining or repairing it. Regulation 2, DCR. Source: Oil & Gas UK, Guidelines on subsea BOP systems, Issue 1, July 2012, Global StandardsWorkover
“Workover” means an operation on a completed well that requires removal of the Christmas tree or the tubing (reconditionnement. Source: Canada Oil and Gas Drilling and Production Regulations, SOR/2009-315, February 2013. Regulations Source: Drilling and Production Guidelines, The Canada-Nova Scotia Offshore Petroleum Board and Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada, March 31, 2011. Regulatory Guidance Source: Nova Scotia Offshore Petroleum Drilling and Production Regulations, SOR/2009-317, Canada, current to May 31, 2012. RegulationsTermination
Definition(s)
Termination
“Termination” means the abandonment, completion or suspension of a well’s operations (cessation). Source: Canada Oil and Gas Drilling and Production Regulations, SOR/2009-315, February 2013. Regulations Source: Drilling and Production Guidelines, The Canada-Nova Scotia Offshore Petroleum Board and Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada, March 31, 2011. Regulatory Guidance Source: Nova Scotia Offshore Petroleum Drilling and Production Regulations, SOR/2009-317, Canada, current to May 31, 2012. RegulationsTermination
“Termination” means the operator’s discontinuance of an EOR project. Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. RegulationsTermination
Occurs when the approved fluid injection program associated with an EOR project stops or is discontinued. Source: Oil and Gas Division, Texas Administrative Code, Title 16, Chapter 3, February 2013. RegulationsFlow System
Definition(s)
Flow System
“Flow system” means the flow meters, auxiliary equipment attached to the flow meters, fluid sampling devices, production test equipment, the master meter and meter prover used to measure and record the rate and volumes at which fluids are- produced from or injected into a pool;
- used as a fuel;
- used for artificial lift; or
- flared or transferred from a production installation (système d’écoulement).
Well-Bore
Definition(s)
Well-Bore
“Well-bore” means the hole drilled by a bit in order to make a well (trou de sonde). Source: Canada Oil and Gas Drilling and Production Regulations, SOR/2009-315, February 2013. Regulations Source: Drilling and Production Guidelines, The Canada-Nova Scotia Offshore Petroleum Board and Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada, March 31, 2011. Regulatory Guidance Source: Nova Scotia Offshore Petroleum Drilling and Production Regulations, SOR/2009-317, Canada, current to May 31, 2012. RegulationsWell-Bore
“Well-bore” means the interior surface of a cased or open hole through which drilling, production or injection operations are conducted. Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. RegulationsWell-Bore
“Wellbore” means the hole made by drilling or boring. [Mich. Admin. Code R 408 (2013)]. Source: Oil and Gas Drilling and Servicing Operations, Michigan Administrative Code R 408, February 8, 2013. RegulationsFlow Calculation Procedure
Definition(s)
Flow Calculation Procedure
“Flow calculation procedure” means the procedure to be used to convert raw meter output to a measured quantity of oil, gas or water (méthode de calcul du débit). Source: Canada Oil and Gas Drilling and Production Regulations, SOR/2009-315, February 2013. Regulations Source: Drilling and Production Guidelines, The Canada-Nova Scotia Offshore Petroleum Board and Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada, March 31, 2011. Regulatory GuidanceFlow Calculation Procedure
“Flow calculation procedure” means the procedure to be used to convert raw meter output to a measured quantity of petroleum or water; méthode de calcul du débit. Source: Nova Scotia Offshore Petroleum Drilling and Production Regulations, SOR/2009-317, Canada, current to May 31, 2012. RegulationsEnvironmental Protection Plan
Definition(s)
Environmental Protection plan
“Environmental protection plan” means the environmental protection plan submitted to the Board under section 6 (plan de protection de l’environnement). Source: Canada Oil and Gas Drilling and Production Regulations, SOR/2009-315, February 2013. Regulations Source: Drilling and Production Guidelines, The Canada-Nova Scotia Offshore Petroleum Board and Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada, March 31, 2011. Regulatory Guidance Source: Nova Scotia Offshore Petroleum Drilling and Production Regulations, SOR/2009-317, Canada, current to May 31, 2012. RegulationsDrilling Program
Definition(s)
Drilling Program
“Drilling program” means the program for the drilling of one or more wells within a specified area and time using one or more drilling installations and includes any work or activity related to the program (programme de forage). Source: Canada Oil and Gas Drilling and Production Regulations, SOR/2009-315, February 2013. Regulations Source: Drilling and Production Guidelines, The Canada-Nova Scotia Offshore Petroleum Board and Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada, March 31, 2011. Regulatory Guidance Source: Nova Scotia Offshore Petroleum Drilling and Production Regulations, SOR/2009-317, Canada, current to May 31, 2012. RegulationsCasing Liner
Definition(s)
Casing Liner
Casing string with its uppermost point inside a previous casing string and not in the wellhead.Source: ISO 16530-1:2017, Petroleum and natural gas industries - Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards