Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
SDLC
Definition(s)
SDLC
Software Development Life-cycle. Source: ISO/IEC 27032:2015, Information technology — Security techniques — Guidelines for cybersecurity, First Edition, July 2012. Global StandardsSDOF
Definition(s)
SDOF
Single degree-of-freedom. Source: ISO 19905-1:202, Petroleum and natural gas industries – Site-specific assessment of mobile offshore units – Part 1: Jack-ups. Global StandardsSDS
Definition(s)
SDS
Safety data sheet [formerly known as material safety data sheet (MSDS)]. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global StandardsSDS
Safety Data Sheets. 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 StandardsSDV
Definition(s)
SDV
Shut-Down Valves. Source: NOPSEMA Guidance Note: Control Measures and Performance Standards, N-04300 GN0271, Australia, Revision 3, December 2011. Regulatory GuidanceSEA
Definition(s)
SEA
End area inspection (formerly called special end area inspection). Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global StandardsSEA (HSS-n)
Definition(s)
SEA (HSS-n)
Ship Event Analysis (Hull Surveillance Systems). Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 1, Regulations, June 2013, Lloyd’s Register, Global StandardsSea Area A1
Definition(s)
Sea Area A1
Sea area A1: an area within the radiotelephony range of at least one VHF radio coastal station, in which continuous DSC alarm signaling is available. Source: Mining Regulation of the Netherlands, WJZ 02063603, Netherlands,16 December 2002. RegulationsSea Area A2
Definition(s)
Sea Area A2
Sea area A2: an area, with the exception of sea area A1, within the radiotelephony range of at least one MF radio coastal station, in which continuous DSC alarm signaling is available. Source: Mining Regulation of the Netherlands, WJZ 02063603, Netherlands,16 December 2002. RegulationsSea Floor
Definition(s)
Sea Floor
Interface between the sea and the seabed. Source:API RP 2EQ, Seismic Design Procedures and Criteria for Offshore Structures, First Edition, November 2014. Global StandardsSea Floor
interface between the sea and the seabed. [ISO 19901-4:2003] Source: API RP 2MET, Derivation of Metocean Design and Operating Conditions, First Edition, November 2014. Global StandardsSea Floor
The term “sea floor” shall in this part also be understood to mean: the bottom of the surface water. Source: Mining Regulation of the Netherlands, WJZ 02063603, Netherlands,16 December 2002. RegulationsSea Floor Slide
Definition(s)
Sea Floor Slide
Failure of sea floor slopes. Source:API RP 2EQ, Seismic Design Procedures and Criteria for Offshore Structures, First Edition, November 2014. Global StandardsSea Ports and Oil Handling Facilities
Definition(s)
Sea Ports and Oil Handling Facilities
"Sea ports and oil handling facilities" means those facilities which present a risk of an oil pollution incident and includes, inter alia, sea ports, oil terminals, pipelines and other oil handling facilities. Source: International Convention on Oil Pollution Preparedness, Response and Co-operation, 1990. LegislationSea State
Definition(s)
Sea State
Condition of the sea during a period in which its statistics remain approximately constant. NOTE In a statistical sense the sea state does not change markedly within the period. The period during which this condition exists is usually assumed to be three hours, although it depends on the particular weather situation at any given time. [ISO 19901-1:2005, definition 3.26]. Source: ISO 19905-1:202, Petroleum and natural gas industries – Site-specific assessment of mobile offshore units – Part 1: Jack-ups. Global Standards Source: API RP 2MET, Derivation of Metocean Design and Operating Conditions, First Edition, November 2014. Global StandardsSeabed
Definition(s)
Seabed
Materials below the sea in which a structure is founded. NOTE The seabed can be considered as the half-space below the sea floor. Source:API RP 2EQ, Seismic Design Procedures and Criteria for Offshore Structures, First Edition, November 2014. Global StandardsSeabed
Materials below the sea in which a structure is founded, whether of soils such as sand, silt or clay, cemented material or of rock NOTE The seabed can be considered as the half-space below the sea floor. [ISO 19901-4:2003] Source: API RP 2MET, Derivation of Metocean Design and Operating Conditions, First Edition, November 2014. Global StandardsSeabed
Materials below the sea in which a structure is founded, whether of soils such as sand, silt or clay, cemented materials or of rock NOTE 1 The seabed can be considered as the half-space below the seafloor. NOTE 2 Offshore foundations are most commonly installed in soils, and the terminology in this part of ISO 19901 reflects this. However, the requirements equally apply to cemented seabed materials and rocks. Thus, the term “soil” does not exclude any other material at or below the seafloor. NOTE 3 As yet there are no universally accepted definitions of the various types of soil and rock, see A.6.4.3. Source: API RP 2GEO, Geotechnical Foundation Design Considerations, First Edition, April, 2011, Addendum 1, October 2014. Global Standards Source: API Recommended Practice 2GEO, Geotechnical and Foundation Design Considerations, First Edition, April 2015 (Addendum 1, October 2014). Global StandardsSeabed Connection
Definition(s)
Seabed connection
Connection between flexible riser end fitting and riser base. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsSeafarer
Definition(s)
Seafarer
Seafarer means any person who is employed or engaged in any capacity on board a seagoing ship. Source: IMO Resolution A.930(22), Guidelines on Provision of Financial Security in Case of Abandonment of Seafarers, 17 December 2001, International Maritime Organization. Regulatory Guidance Source: IMO Resolution A.931(22), Guidelines on Shipowners' Responsibilities in respect of Contractual Claims for Personal Injury to or Death of Seafarers, 17 December 2001, International Maritime Organization. Regulatory GuidanceSeafarer
A seafarer means any person who is employed or engaged or works in any capacity on board a ship. 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 GuidanceSeafloor
Definition(s)
Seafloor
Interface between the sea and the seabed. Source: API RP 2GEO, Geotechnical Foundation Design Considerations, First Edition, April, 2011, Addendum 1, October 2014. Global Standards Source: API Recommended Practice 2GEO, Geotechnical and Foundation Design Considerations, First Edition, April 2015 (Addendum 1, October 2014). Global StandardsSeafloor
“Seafloor” means the surface of all that portion of land under the sea (fond marin). 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. RegulationsSeagoing Condition
Definition(s)
Seagoing condition
Seagoing condition means the operating condition of the unit with the personnel, equipment, fluids, and ballast necessary for safe operation on the waters where the unit operates. For bottom-bearing mobile offshore drilling units (MODU), the term also applies in the bottom-bearing mode, but the lightest seagoing condition is considered to be the highest anticipated operating condition. Source: Mobile Offshore Drilling Units, 46 CFR 107-109 (2013). RegulationsSeal
Definition(s)
Seal
Component designed to prevent the passage of fluids. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global StandardsSeal
A device or approved method used to prevent tampering with royalty measurement components. Source: Oil and Gas and Sulphur Operations in the Outer Continental Shelf, 30 CFR 250 (2013). RegulationsSeal
Barrier to prevent the passage of fluids. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global Standards Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global StandardsSeal
Device providing a barrier to the passage of liquid and/or gas. Source: API SPEC 11D1, Packers and Bridge Plugs, Upstream Segment, Second Edition, July 2009. Global StandardsSeal Element
Definition(s)
Seal element
Part of an I/J-tube seal that provides the seal. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsSeal Ovality
Definition(s)
Seal Ovality
Maximum seal diameter minus the minimum seal diameter divided by the average seal diameter multiplied by 100. NOTE Seal ovality is expressed as a percentage. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global StandardsSeal, Environmental
Definition(s)
Seal, Environmental
A seal that uses O-rings, epoxy, molded elastomer, silicone compound, or potting compound to prevent corrosion due to moisture or vapors. Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards Source: API RP 14F, Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class 1, Division 1 and Division 2 Locations, Fifth Edition, July 2008. Global StandardsSeal, Explosion-proof Cable
Definition(s)
Seal, Explosion-proof Cable
A cable termination fitting filled with compound and designed to contain an explosion in the enclosure to which it is attached or to minimize passage of flammable gases or vapors from one location to another. An explosion-proof conduit seal may also be used in combination with a cable termination fitting as an explosion-proof cable seal. Source: API RP 14F, Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class 1, Division 1 and Division 2 Locations, Fifth Edition, July 2008. Global StandardsSeal, Explosion-proof Conduit
Definition(s)
Seal, Explosion-proof Conduit
A sealing fitting, filled with a poured potting compound, designed to contain an explosion in the enclosure to which it is attached and to minimize passage of flammable gases or vapors from one location to another. Source: API RP 14F, Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class 1, Division 1 and Division 2 Locations, Fifth Edition, July 2008. Global StandardsSeal, Explosionproof Cable
Definition(s)
Seal, Explosionproof Cable
A cable termination fitting filled with compound and designed to contain an explosion in the enclosure to which it is attached or to minimize passage of flammable gases or vapors from one location to another. An explosionproof conduit seal may also be used in combination with a cable termination fitting as an explosionproof cable seal.
Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global StandardsSeal, Explosionproof Conduit
Definition(s)
Seal, Explosionproof Conduit
A sealing fitting, filled with a poured potting compound, designed to contain an explosion in the enclosure to which it is attached and to minimize passage of flammable gases or vapors from one location to another.
Source: API Recommended Practice 14FZ, Recommended Practice for Design, Installation, and Maintenance of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations, Second Edition, May 2013. Global Standards