Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
Tank Test
Definition(s)
Tank Test
Tank test means model towing tests, model self-propulsion tests and model propeller open water tests. Numerical calculations may be accepted as equivalent to model propeller open water tests or used to complement the tank tests conducted (e.g. to evaluate the effect of additional hull features such as fins, etc., on ship's performance), with approval of the verifier. Source: Resolution MEPC.214(63), 2012 Guidelines on survey and certification of the Energy Efficiency Design Index (EEDI), 2 March 2012, International Maritime Organization. Regulatory GuidanceTarget Group(s)
Definition(s)
Target Groups
Target groups as mentioned in the third subsection, means e.g. decision-makers, employees and their elected representative. Source: Guidelines Regarding the Management Regulations, Norway, updated December 2012. Regulatory GuidanceTask Analysis
Definition(s)
Task Analysis
Task analysis enables the systematic examination of all occupations and tasks to establish the effectiveness of work procedures and practices and to identify hazards associated with any of the sequential steps. The process involves: • Inventory of the tasks. • Identify the critical tasks and concentrate on these. Consider such factors as: — the severity of the potential losses; — the frequency with which the task is performed; — the probability of loss when the task is performed. • Break down the work into significant steps or critical activities. • Identify what could go wrong. Consider people, equipment, materials, environment. • Is it being done the best way? Consider cost, production, quality and safety. • Develop controls: specific actions and precautions to prevent loss from occurring. • Write down the procedure: a step-by-step description of how to proceed, what to do, why, in a simple, easy-to-follow format or practice. • Put to work task instruction, skill training, etc. Documentation and followup of progress is important. Two basic approaches are: — analysis by observation and discussion; Ñ analysis by discussion alone. Source: Approved Code of Practice for Managing Hazards to Prevent Major Industrial Accidents, Health and Safety in Employment Act 1992, Department of Labour, New Zealand, July 1994. Regulatory GuidanceTask Station
Definition(s)
Task Station
Multifunction display with dedicated controls providing the possibility to display and operate any tasks. A task station is part of a workstation. Source: IMO Resolution MSC.302(87), Performance standards for bridge alert management, 17 May 2010, International Maritime Organization. Regulatory GuidanceTC
Definition(s)
TC
Thermal cycle. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global StandardsT&C
Threaded and coupled. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsTC
Test coupon. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsTC
To contain. Source: API SPEC 13A, Specification for Drilling Fluids Materials, Eighteenth Edition, February 2010. Global StandardsTC
Transport Canada. Source: Offshore Physical Environmental Guidelines, The Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada-Nova Scotia Offshore Petroleum Board, and National Energy Board, Canada, September 2008. Regulatory GuidanceTechnical File
Definition(s)
Technical File
A Technical File is a record containing all details of parameters, including components and settings of an engine, which may influence the NOx emission of the engine, in accordance with 2.4 of this Code. Source: Resolution MEPC.177(58), amendments to the Technical Code on Control of Emission of Nitrogen Oxides from Marine Diesel Engines, 10 October 2008, International Maritime Organization. Regulatory GuidanceTEMPSC
Definition(s)
TEMPSC
Totally Enclosed Motor Propelled Survival Craft. Source: International Association of Drilling Contractors, Appendix 2 to Health, Safety and Environment Case Guidelines for Offshore Drilling Contractors, Issue 3.3.2, February 2010. IADC Guidelines Source: ISO 13702:2015, Petroleum and natural gas industries — Control and mitigation of fires and explosions on offshore production installations — Requirements and guidelines, Second Edition, August 2015. Global Standards Source: Prevention of Fire and Explosion, and Emergency Response on Offshore Installations, Offshore Installations (Prevention of Fire and Explosion, and Emergency Response) Regulations 1995, Approved Code of Practice and guidance (UK HSE L65), Second Edition, 1997. Regulatory GuidanceTermination
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. RegulationsTerritorial Sea
Definition(s)
Territorial Sea
“Territorial sea” means the territorial sea adjacent to Great Britain and “within the territorial sea” includes on, over and under it. Source: The Health and Safety at Work etc. Act 1974 (Application outside Great Britain) Order 2001, UK S.I. 2013/214, 2013. RegulationsTerritorial Sea
Territorial sea means territorial sea as defined by Section 2 of Part II of the United Nations Convention on the Law of the Sea. Source: IMO Resolution MSC.255(84), Code of the International Standards and Recommended Practices for a Safety Investigation into a Marine Casualty or Marine Incident (Casualty Investigation Code), 16 May 2008, International Maritime Organization. Regulatory GuidanceTest Expiry Date
Definition(s)
Test Expiry Date
Test expiry date means the last date on which the given test procedure may be used to test and subsequently approve any product under the Convention. Source: IMO Resolution MSC.307(88), International Code for Application of Fire Test Procedures, 2010 (2010 FTP Code), 3 December 2010, International Maritime Organization. Regulatory GuidanceTesting Ashore
Definition(s)
Testing Ashore
Testing ashore – testing carried out on a sewage treatment plant prior to installation e.g. in the factory. Source: Resolution MEPC.159(55), Revised Guidelines on Implementation of Effluent Standards and Performance Tests for Sewage Treatment Plants, 13 October 2006, International Maritime Organization Regulatory GuidanceTesting Establishment
Definition(s)
Testing Establishment
Testing establishment means an establishment accepted by the Administration having the equipment and the qualifications necessary for the testing and approval of liferaft release hooks. Source: IMO Resolution MSC.81(70), Revised Recommendation on Testing of Life-Saving Appliances, 11 December 1998, International Maritime Organization. Regulatory GuidanceTesting Onboard
Definition(s)
Testing Onboard
Testing onboard – testing carried out on a sewage treatment plant that has been installed upon a ship. Source: Resolution MEPC.159(55), Revised Guidelines on Implementation of Effluent Standards and Performance Tests for Sewage Treatment Plants, 13 October 2006, International Maritime Organization Regulatory GuidanceThe 1974 Act
Definition(s)
The 1974 Act
The Health and Safety at Work etc Act 1974 (Application outside Great Britain) Order 1995 [Note: The Health and Safety at Work etc Act 1974 (Application outside Great Britain) Order 1995 SI 1995/263] revoked and re-enacted the 1989 Order with modifications. References in OFAR to the 1989 Order should be construed as referring to the appropriate parts of the 1995 Order. Source: Health Care and First Aid on Offshore Installations and Pipeline Works, Offshore Installations and Pipeline Works (First-Aid) Regulations 1989, Approved Code of Practice and Guidance (UK HSE L123), Second Edition, 2000. Regulatory GuidanceThe 1974 Act
“The 1974 Act” means the Health and Safety at Work etc. Act 1974. Note: 1974 c. 37. Source: The Offshore Installations (Safety Representatives and Safety Committees) Regulations 1989, UK S.I. 1989/971, 1989. RegulationsThe 1974 Act
“The 1974 Act” means the Health and Safety at Work etc. Act 1974. Source: The Offshore Installations and Pipeline Works (First-Aid) Regulations 1989, UK S.I. 1989/1671, 1989. Regulations Source: The Health and Safety at Work etc. Act 1974 (Application outside Great Britain) Order 2001, UK S.I. 2013/214, 2013. RegulationsThe 1989 Order
Definition(s)
The 1989 Order
“The 1989 Order” means the Health and Safety at Work etc. Act 1974 (Application outside Great Britain) Order 1989. Note: S.I. 1989/840. Source: The Offshore Installations and Pipeline Works (First-Aid) Regulations 1989, UK S.I. 1989/1671, 1989. Regulations. Regulatory GuidanceThe 1989 Order
In regulation 2 (interpretation) of the Offshore Installations (Safety Case) Regulations 1992 (Note: S.I. 1992/2885.) (“the 1992 Regulations”) in paragraph (1) (definitions) for the definition of “the 1989 Order” there shall be substituted the following definition: ““the 1995 Order” means the Health and Safety at Work etc. Act 1974 (Application outside Great Britain) Order 1995”. Source: The Offshore Installations and Pipeline Works (Management and Administration) Regulations 1995, UK S.I. 1995/738, 1995. RegulationsThe 1995 Regulations
Definition(s)
The 1995 Regulations
The abbreviation MAR is generally used for these Regulations in the text of this publication. Source: Prevention of Fire and Explosion, and Emergency Response on Offshore Installations, Offshore Installations (Prevention of Fire and Explosion, and Emergency Response) Regulations 1995, Approved Code of Practice and guidance (UK HSE L65), Second Edition, 1997. Regulatory GuidanceThe 1995 Regulations
For the Mineral Workings (Offshore Installations) Act 1971, in Section 12(1), before the definition of “controlled waters” there shall be inserted the following definition: ““the 1995 Regulations” means the Offshore Installations and Pipeline Works (Management and Administration) Regulations 1995”. Source: The Offshore Installations and Pipeline Works (Management and Administration) Regulations 1995, UK S.I. 1995/738, 1995. RegulationsThe 1995 Regulations
In regulation 2 (interpretation) of the Offshore Installations (Safety Representatives and Safety Committees) Regulations 1989 (Note: S.I. 1989/971; amended by S.I. 1992/2885.) (“the 1989 Regulations”): after the definition of “the 1974 Act” there shall be inserted the following definition: ““the 1995 Regulations” means the Offshore Installations and Pipeline Works (Management and Administration) Regulations 1995”. Source: The Offshore Installations and Pipeline Works (Management and Administration) Regulations 1995, UK S.I. 1995/738, 1995. RegulationsThe 1995 Regulations
In regulation 2 (interpretation) of the Offshore Installations (Emergency Pipe-line Valve) Regulations 1989 (Note: S.I. 1989/1029.) before the definition of “associated installation” there shall be inserted the following definition: ““the 1995 Regulations” means the Offshore Installations and Pipeline Works (Management and Administration) Regulations 1995”. Source: The Offshore Installations and Pipeline Works (Management and Administration) Regulations 1995, UK S.I. 1995/738, 1995. RegulationsThe 1995 Regulations
In regulation 2 (interpretation) of the Offshore Installations and Pipeline Works (First-Aid) Regulations 1989 (Note: S.I. 1989/1671.) after the definition of “the 1989 Order” there shall be inserted the following definition: ““the 1995 Regulations” means the Offshore Installations and Pipeline Works (Management and Administration) Regulations 1995”. Source: The Offshore Installations and Pipeline Works (Management and Administration) Regulations 1995, UK S.I. 1995/738, 1995. RegulationsThe 1995 Regulations
“The 1995 Regulations” means the Offshore Installations and Pipeline Works (Management and Administration) Regulations 1995. Note: S.I. 1995/738. Source: The Offshore Installations (Prevention of Fire and Explosion, and Emergency Response) Regulations 1995, S.I. 1995/743, 1995. RegulationsThe Ballast Water Management Plan
Definition(s)
The Ballast Water Management Plan
The Ballast Water Management Plan is the document referred to in regulation B-1 of the Convention describing the ballast water management process and procedures implemented on board individual ships. Source: Resolution MEPC.174(58), revised Guidelines for approval of ballast water management systems (G8), 10 October 2008, International Maritime Organization. Regulatory GuidanceThe Executive
Definition(s)
The Executive
‘The Executive’ is the statutory three-person Health and Safety Executive. Previous references to the Secretary of State are to be construed as references to the Executive, by the Offshore Safety (Repeals and Modifications) Regulations 1993. Source: Health Care and First Aid on Offshore Installations and Pipeline Works, Offshore Installations and Pipeline Works (First-Aid) Regulations 1989, Approved Code of Practice and Guidance (UK HSE L123), Second Edition, 2000. Regulatory GuidanceThe Executive
“The Executive” means the Health and Safety Executive. Source: The Offshore Installations (Prevention of Fire and Explosion, and Emergency Response) Regulations 1995, S.I. 1995/743, 1995. Regulations Source: The Borehole Sites and Operations Regulations 1995, UK S.I. 1995/2038, 1995. Regulations Source: The Offshore Installations (Safety Case) Regulations 2005, UK S.I. 2005/3117, 2005. RegulationsThe Regulations
Definition(s)
The Regulations
‘The Regulations’ means the Offshore Installations and Pipeline Works (First-Aid) Regulations 1989. Source: Health Care and First Aid on Offshore Installations and Pipeline Works, Offshore Installations and Pipeline Works (First-Aid) Regulations 1989, Approved Code of Practice and Guidance (UK HSE L123), Second Edition, 2000. Regulatory GuidanceThe Standard Time-Temperature Curve
Definition(s)
The Standard Time-Temperature Curve
The standard time-temperature curve means the time-temperature curve defined by the formula: T = 345 log10(8t + 1) + 20 where: T is the average furnace temperature (°C) t is the time (min). Source: IMO Resolution MSC.307(88), International Code for Application of Fire Test Procedures, 2010 (2010 FTP Code), 3 December 2010, International Maritime Organization. Regulatory GuidanceThemed Audit
Definition(s)
Themed audit
A particular form of inspection, described in the relevant regulatory process. Source: NOPSEMA Guideline – Glossary – Regulatory Operations, N-09000-GL0326, Australia, Revision 5, December 2011. Regulatory GuidanceThermotolerant Coliforms
Definition(s)
Thermotolerant Coliforms
Thermotolerant coliforms – the group of coliform bacteria which produce gas from lactose in 48 hours at 44.5ºC. These organisms are sometimes referred to as “faecal coliforms”; however, the term “thermotolerant coliforms” is now accepted as more appropriate, since not all of these organisms are of faecal origin. Source: Resolution MEPC.159(55), Revised Guidelines on Implementation of Effluent Standards and Performance Tests for Sewage Treatment Plants, 13 October 2006, International Maritime Organization Regulatory GuidanceThreshold Level
Definition(s)
Threshold Level
"Threshold level" is defined as the concentration value in homogeneous materials. Source: Resolution MEPC.197(62), 2011 Guidelines for the development of the Inventory of Hazardous Materials, 15 July 2011, International Maritime Organization. Regulatory GuidanceThruster System
Definition(s)
Thruster System
All components and systems necessary to supply the DP system with thrust force and direction. The thruster system includes:- thrusters with drive units and necessary auxiliary systems including piping, cooling, hydraulic, and lubrication systems, etc.
- main propellers and rudders if these are under the control of the DP system
- thruster control system(s)
- manual thruster controls
- associated cabling and cable routing.
Thruster System
Thruster system means all components and systems necessary to supply the DP system with thrust force and direction. The thruster system includes:- thrusters with drive units and necessary auxiliary systems including piping, cooling, hydraulic, and lubrication systems, etc.;
- main propellers and rudders if these are under the control of the DP system;
- thruster control system(s);
- manual thruster controls; and
- associated cabling and cable routeing.
Time to Safely Terminate (operations)
Definition(s)
Time to Safely Terminate (operations)
The amount of time required in an emergency to safely cease operations of the DP vessel.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceTime to Safely Terminate (operations)
Time to safely terminate (operations) means the amount of time required in an emergency to safely cease operations of the DP vessel.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance