Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
PPE
Definition(s)
PPE
Personal Protective Equipment. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards Source: A Guide to the Offshore Installations and Pipelines Works (Management and Administration) Regulations 1995, Guidance on Regulations (UK HSE L70), Second Edition, 2002. Regulatory Guidance Source: API RP 74, Recommended Practice for Occupational Safety for Onshore Oil and Gas Production Operation, First Edition, October 2001 (March 2007). Global Standards Source: API RP 98, Personal Protective Equipment Selection for Oil Spill Responders, First Edition, August 2013. Global Standards Source:API RP T-1, Creating Orientation Programs for Personnel Going Offshore, Fifth Edition, November 2016. Global Standards 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: Rules for Classification and Construction, IV Industrial Services, 6 Offshore Technology, 9 Guideline for Personnel Transfers by Means of Lifting Appliances, Edition 2011, Germanischer Lloyd SE, Global StandardsPPE
Clothing and equipment designed to protect responders from serious workplace injuries or illnesses resulting from contact with chemical, radiological, physical, electrical, mechanical, or other workplace hazards. NOTE Besides face shields, safety glasses, hard hats, and safety shoes, protective equipment includes a variety of devices and garments such as goggles, coveralls, gloves, vests, earplugs, and respirators Source: API RP 98, Personal Protective Equipment Selection for Oil Spill Responders, First Edition, August 2013. Global StandardsModel
Definition(s)
Model
Tool design with unique components and operating characteristics, which differentiate it from other tool designs of the same type.
Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global StandardsModel
SSSV equipment with unique components and operating characteristics which differentiate it from other SSSV equipment of the same type. NOTE The same model can have any of a variety of end connections. Source: API SPEC 14A, Specification for Subsurface Safety Valve Equipment, Eleventh Edition, October 2005 (Reaffirmed June 2012). Global StandardsModel
A model is defined as a physical, mathematical, or otherwise logical representation of a system, entity, phenomenon, or process [81]. Source: API TR 1PER15K-1, Protocol for Verification and Validation of High-pressure High-temperature Equipment, First Edition, March 2013. Global StandardsModel
Approximation, representation, or idealization of selected aspects of the structure, behavior, operation, or other characteristics of a real-world process, concept, or system Sample Usage: To assess risk for over 400 events, analysts created a model based on only the most important factors. Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory GuidanceMAR
Definition(s)
MAR
Offshore Installations and Pipeline Works (Management and Administration) Regulations 1995. Source: A Guide to the Offshore Installations and Pipelines Works (Management and Administration) Regulations 1995, Guidance on Regulations (UK HSE L70), Second Edition, 2002. Regulatory GuidanceMAR
Management and Administration Regulations, UK. 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 GuidelinesMAR
Offshore Installations and Pipeline Works (Management and Administration) Regulations 1995. 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 GuidanceLength (L)
Definition(s)
Length (L)
Length (L) means 96% of the total length on a waterline at 85% of the least moulded depth measured from the top of the keel, or the length from the foreside of the stem to the axis of the rudder stock on that waterline, if that be greater. In ships designed with a rake of keel, the waterline on which this length is measured shall be parallel to the designed waterline. The length (L) shall be measured in metres. 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.141(54), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Amendments to regulation 1, addition to regulation 12A, consequential amendments to the IOPP Certificate and amendments to regulation 21 of the revised Annex I of MARPOL 73/78), 24 March 2006, International Maritime Organization. LegislationLength (L)
Length (L) is the length as defined in the International Convention on Load Lines in force. <Chapter II-1, regulation 2>. Source: IMO Resolution MSC.216(82), amendments to the International Convention for the Safety of Life at Sea, 1974, as amended, 8 December 2006, International Maritime Organization. LegislationLength (L)
“Length (L)” means 96% of the total length on a waterline of 85% at the least moulded depth measured from the top of the keel, or the length from the foreside of the stem to the axis of the rudder stock on that waterline, if that be greater. In ships designed with a rake of keel, the waterline on which this length is measured should be parallel to the designed waterline. The length (L) should be measured in metres. Source: IMO Resolution MSC.266(84), Code of Safety for Special Purpose Ships, 2008 (2008 SPS Code), 13 May 2008, International Maritime Organization. Regulatory GuidanceLength
Definition(s)
Length (or Joint)
Complete section of pipe. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global StandardsLength
Piece of pipe that may be plain-end, threaded, or threaded and coupled, that is in accordance with the range requirements in Table C.27 or Table E.27 of this Standard. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global StandardsLength
“Length” means the length as defined in the International Convention on Load Lines, 1966, as modified by the Protocol of 1988 relating thereto, or any successor Convention. Source: International Convention on the Control of Harmful Anti-fouling Systems on Ships,2001. LegislationLength
Length (L) has the same meaning as defined in regulation 3 of the 1988 LL Protocol. Source: IMO Resolution A.1023(26), Code for the Construction and Equipment of Mobile Offshore Drilling Units (2009 MODU Code), 2009. Global StandardsLength
Length of a ship means its length overall. <Chapter V, regulation 2>. Source: Resolution MSC.142(77), amendments to the International Convention for the Safety of Life at Sea, 1974, as amended, 5 June 2003, International Maritime Organization, LegislationLength
"Length" means the length as defined in the International Convention on Load Lines, 1966, as modified by the Protocol of 1988 relating thereto, or any successor convention. Source: Resolution MEPC.195(61), 2010 Guidelines for Survey and Certification of Anti-fouling Systemson Ships, 1 October 2010, International Maritime Organization, Regulatory GuidanceLength
Length (a) The length (L) shall be taken as 96% of the total length on a waterline at 85% of the least moulded depth measured from the top of the keel, or as the length from the fore side of the stem to the axis of the rudder stock on that waterline, if that be greater. (b) For ships without a rudder stock, the length (L) is to be taken as 96% of the waterline at 85% of the least moulded depth. (c) Where the stem contour is concave above the waterline at 85% of the least moulded depth, both the forward terminal of the total length and the fore-side of the stem respectively shall be taken at the vertical projection to that waterline of the aftermost point of the stem contour (above that waterline) (see figure 3.1).
(d) In ships designed with a rake of keel the waterline on which this length is measured shall be parallel to the designed waterline at 85% of the least moulded depth Dmin, found by drawing a line parallel to the keel line of the vessel (including skeg) tangent to the moulded sheer line of the freeboard deck. The least moulded depth is the vertical distance measured from the top of the keel to the top of the freeboard deck beam at side at the point of tangency (see figure 3.2).
<Chapter I, regulation 3>.
Source: IMO Resolution MSC.143(77), amendments to Annex B to the 1988 Load Lines Protocol, 5 June 2003, International Maritime Organization. Legislation
Length
Length means the length overall. Source: IMO Resolution MSC.253(83), Recommendation on Performance Standards for Navigation Lights, Navigation Light Controllers and associated equipment, 8 October 2007, International Maritime Organization. Regulatory GuidanceLength
Length is 96% of the total length on a waterline at 85% of the least moulded depth measured from the top of the keel, or the length from the fore-side of the stem to the axis of the rudder stock on that waterline, if that be greater. In ships designed with a rake of keel the waterline on which this is measured shall be parallel to the designed waterline. <Chapter III, Part A, regulation 3>. Source: IMO Resolution MSC.47(66), adoption of amendments to the International Convention for the Safety of Life at Sea (SOLAS), 1974, 4 June 1996, International Maritime Organization. LegislationRecognized Organization
Definition(s)
Recognized Organization
Recognized organization means an organization recognized by an Administration in accordance with IMO resolutions A.739(18) and A.789(19). Source: IMO resolution A.1021(26), Guidelines for ships operating in polar waters, 18 January 2010, International Maritime Organization. Regulatory GuidanceRecognized Organization
An organization which meets the relevant conditions set forth by resolution A.739(18), as amended by resolution MSC.208(81), and resolution A.789(19), and has been authorized by the flag State Administration to provide the necessary statutory services and certification to ships entitled to fly its flag. Source: IMO resolution A.1052(27), Procedures for Port State Control, 2011, 201 December 2011, International Maritime Organization. Regulatory GuidanceHSE
Definition(s)
HSE
Health and Safety Executive. Source: DNVGL-RP-G108, Cyber security in the oil and gas industry based on IEC 62443, DNV GL, September 2017. 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 Guidance Source: A Guide to the Offshore Installations and Pipelines Works (Management and Administration) Regulations 1995, Guidance on Regulations (UK HSE L70), Second Edition, 2002. Regulatory Guidance Source: Commercial Diving Projects Offshore, Diving at Work Regulations 1997, Approved Code of Practice (UK HSE L103), First Edition, 1998. Regulatory Guidance Source: NOGEPA Guideline 14, Helideck Operations and Procedures Manual, Netherlands, Version 2, December 2011. Global Standards Source: NORSOK D-010, Well integrity in drilling and well operations, Rev. 3, August 2004. Global Standards Source: Oil & Gas UK, Guidelines on subsea BOP systems, Issue 1, July 2012, Global Standards Source: Rules for Classification and Construction, IV Industrial Services, 6 Offshore Technology, 9 Guideline for Personnel Transfers by Means of Lifting Appliances, Edition 2011, Germanischer Lloyd SE, Global StandardsHSE
Health, Safety and Environment. Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global Standards Source: API Bulletin 97, Well Construction Interface Document Guidelines, First Edition, December 2013. Global Standards Source: Deep Water Well Control Guidlines. IADC Guidelines 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: IOGP Report No. 510, Operating Management System Framework for controlling risk and delivering high performance in the oil and gas industry, International Association of Oil & Gas Producers, June 2014. Global Standards Source: 117 OLF, Norwegian Oil and Gas Association recommended guidelines for Well Integrity, No. 117, Revision No. 4, June 2011. Global Standards Source: Safety Plan Guidelines, The Canada-Newfoundland and Labrador Offshore Petroleum Board, Canada-Nova Scotia Offshore Petroleum Board, and National Energy Board, Canada, March 31, 2011. Regulatory GuidanceHSE
United Kingdom Health and Safety Executive. Source: NOPSEMA Guidance Note: ALARP, N-04300-GN0166, Australia, Revision 4, December 2012. Regulatory GuidanceHSE
Health and Safety Executive, UK. 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 GuidelinesHSE
Health, safety and environmental. Source: ISO 15544:2000, Petroleum and natural gas industries – Offshore production installations – Requirements and guidelines for emergency. Global StandardsHSE
Health, safety, environment. Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global StandardsESD
Definition(s)
ESD
Emergency Shutdown System. Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global StandardsESD
Emergency shutdown. Source: DNVGL-RP-G108, Cyber security in the oil and gas industry based on IEC 62443, DNV GL, September 2017. Global Standards Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards Source: ISO 17776:2016, Petroleum and natural gas industries — Offshore production installations — Major accident hazard management during the design of new installations, Second Edition, December 2016. Global Standards Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global StandardsESD
Shut down of the facility under emergency conditions during which the internal pressure in a production riser can increase above the normal operating pressure. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global StandardsESD
Emergency shut-down. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards Source: API RP 14G, Recommended Practice for Fire Prevention and Control on Fixed Open-type Offshore Production Platforms: Upstream Segment, Fourth Edition, April 2007. Global Standards Source: API RP 17A, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, Fourth Edition, Reaffirmed 2011. Global Standards Source: API SPEC 17F, Specification for Subsea Production Control Systems, Second Edition, December 2006 (Reaffirmed April 2011). Global Standards Source: 117 OLF, Norwegian Oil and Gas Association recommended guidelines for Well Integrity, No. 117, Revision No. 4, June 2011. Global Standards 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: ISO 15544:2000, Petroleum and natural gas industries – Offshore production installations – Requirements and guidelines for emergency. Global Standards Source: ISO 17776:2000, Petroleum and natural gas industries – Offshore production installations – Guidelines on tools and techniques for hazard identification and risk assessment. Global Standards Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards Source: NOPSEMA Guidance Note: Control Measures and Performance Standards, N-04300 GN0271, Australia, Revision 3, December 2011. Regulatory Guidance Source: NORSOK D-010, Well integrity in drilling and well operations, Rev. 3, August 2004. Global Standards Source: NORSOK D-002, Well intervention equipment, Rev. 2, June 2013. Global Standards Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global StandardsESD
Control actions undertaken to shut down equipment or processes in response to a hazardous situation. 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 StandardsESD
Emergency shutdown system. 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 Guidance Source: NORSOK D-001, Drilling facilities, Rev. 3, December 2012. Global StandardsEquipment
Definition(s)
Equipment
Components or assemblies to which this specification is applicable. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global StandardsEquipment
Any item or assembled equipment to which this International Standard is applicable. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsEquipment
Any single completed unit that can be used for its intended purpose without further processing or assembly. Source: API SPEC 16A, Specification for Drill-through Equipment, Third Edition, June 2004 (Errata/Supplement November 2004). Global StandardsEquipment
Any single completed unit that can be used for its intended purpose without further processing or assembly (e.g., a valve, choke, crone, tee, spool, etc.). Source: API SPEC 16C, Specification for Choke and Kill Systems, First Edition, January 1993 (Reaffirmed 2001). Global StandardsEquipment
“Equipment” means any plant, machinery, apparatus or system used, formerly used or intended to be used (whether on or from an offshore installation or on or from an attendant vessel) in the assembly, reconstruction, repair, dismantlement, operation, movement or inspection of an offshore installation or the inspection of the sea bed under or near an offshore installation. Source: The Offshore Installations (Inspectors and Casualties) Regulations 1973, UK S.I. 1973/1842, 1973. RegulationsEquipment
Equipment as mentioned in the first subsection, includes personnel winches, personnel baskets and the like. Source: Guidelines Regarding the Facilities Regulations, Norway, updated December 2012. Regulatory GuidanceEquipment
Equipment as mentioned in the second subsection, includes medication and first aid equipment, stretchers and medical rescue equipment. Source: Guidelines Regarding the Facilities Regulations, Norway, updated December 2012. Regulatory GuidanceEmergency
Definition(s)
Emergency
“Emergency” means an exceptional situation resulting from an accident or incident (urgence). Source: Canada Oil and Gas Diving Regulations, SOR/88-600, February 2013. Regulations Source: Nova Scotia Offshore Area Petroleum Diving Regulations, SOR/95-189, Canada, current to May 31, 2012. RegulationsEmergency
Hazardous event which cannot be handled by normal measures and requires immediate action to limit its extent, duration or consequences. Source: ISO 15544:2000, Petroleum and natural gas industries – Offshore production installations – Requirements and guidelines for emergency. Global StandardsEmergency
Emergency, in relation to a facility, means an urgent situation that presents, or may present, a risk of death or serious injury to persons at the facility. Source: Offshore Petroleum and Greenhouse Gas Storage (Safety) Regulations 2009 (Select Legislative Instrument 2009 No. 382 as amended), Australia, prepared on 1 January 2012. RegulationsEmergency
An emergency includes any unexpected event of whatever nature with the potential to cause harm and to require the evacuation, escape and rescue of one or more persons from the installation. 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 GuidanceEmergency
“Emergency” means an emergency of a kind which can require evacuation, escape or rescue. Source: The Offshore Installations (Prevention of Fire and Explosion, and Emergency Response) Regulations 1995, S.I. 1995/743, 1995. RegulationsEmergency
an unforeseen combination of circumstances or the resulting state that calls for immediate action NOTE: Action to safeguard the health and the safety of persons. Source: Rules for Classification and Construction, IV Industrial Services, 6 Offshore Technology, 9 Guideline for Personnel Transfers by Means of Lifting Appliances, Edition 2011, Germanischer Lloyd SE, Global StandardsDuty Holder
Definition(s)
Duty holder
The ‘duty holder’ is the operator in the case of a fixed installation (including fixed production and storage units); and the owner in the case of a mobile installation. Source: A Guide to the Offshore Installations (Safety Representatives and Safety Committees) Regulations 1989, Guidance on Regulations (UK HSE L110), Third Edition, 2012. Regulatory GuidanceDuty holder
The ‘duty holder’ is defined in regulation 2(1) of MAR. Detailed guidance is set out in the guidance to MAR, regulation 2. 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 GuidanceDuty holder
Any person with a duty under any listed OHS law. Source: NOPSEMA Guideline – Glossary – Regulatory Operations, N-09000-GL0326, Australia, Revision 5, December 2011. Regulatory GuidanceDuty holder
The duty holder structure for these Regulations is the same as that in SCR (the operator, in the case of a fixed installation, and the owner, in the case of a mobile installation). 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 GuidanceDuty holder
“Duty holder” means- in relation to a fixed installation, the operator; and
- in relation to a mobile installation, the owner.
Duty holder
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 “appropriate languages” there shall be inserted the following definition: ““duty holder” in relation to an offshore installation means the person who is the duty holder within the meaning of regulation 2(1) of the 1995 Regulations for the purpose of those Regulations”. Source: The Offshore Installations and Pipeline Works (Management and Administration) Regulations 1995, UK S.I. 1995/738, 1995. RegulationsDuty holder
“duty holder” means—- in relation to a production installation, the operator; and
- in relation to a non-production installation, the owner.
Duty holder
For S.I. 1995/738, in regulation 2(1) (interpretation) for the definition of “duty holder”, substitute ““duty holder” means—- in relation to a production installation, the operator; and
- in relation to a non-production installation, the owner.
Combined Operation
Definition(s)
Combined Operation
An operation carried out from one facility with another facility or facilities that materially affects safety of persons or the protection of the environment on any or all of the affected facilities [e.g. a lift boat or self-elevating mobile offshore drilling unit (MODU) working over a fixed platform]. on the basis of relevant available information and informed professional judgment.
Source: API Bulletin 97, Well Construction Interface Document Guidelines, First Edition, December 2013. Global Standards