Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
Stack Connector
Definition(s)
Stack Connector
Hydraulically operated connector that joins the BOP stack to the subsea wellhead. Source: ISO 13624-1:2009, Petroleum and natural gas industries – Drilling and production equipment – Part 1:Design and operation of marine drilling riser equipment. Global StandardsStorm Configuration
Definition(s)
Storm Configuration (Riser Hang-Off)
The riser is hung off (disconnected) near the wellhead in a severe storm with the LMRP in the riser string. Source: ISO 13624-1:2009, Petroleum and natural gas industries – Drilling and production equipment – Part 1:Design and operation of marine drilling riser equipment. Global StandardsSurvey
Definition(s)
Survey
A specific visual or nondestructive examination of one or more platform components. Source: API RP 2SIM, Structural Integrity Management of Fixed Offshore Structures, First Edition, November 2014. Global StandardsSurvey
An examination of a piece of equipment or a vessel in accordance with the appropriate Classification Society rules, guides, standards or other criteria of the Classification Society / Certifying Authority or in accordance with other specific standards. The examination may be required under classification or certification, or requested as a result of damage sustained by the piece of equipment or vessel. 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 GuidelinesSurvey
Signifies a systematic and independent examination of a vessel, materials, components or systems in order to verify compliance with the rules and/or statutory requirements. Surveys will be carried out on the vessel, at the construction or repair site as well as at sub-suppliers and other locations at the discretion of the Society, which also decides the extent and method of control. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global StandardsSummary of Operation Boundaries
Definition(s)
Summary of Operation Boundaries (SOOB)
A summary of defeating factors (either single or in combination) that have the potential to exceed the tolerability limits of safe operations. These defeating factors are qualitatively determined using experience and establish the boundaries in which operations are carried out. Other Related Terms and Definitions: Shell EP95-0010 (Revision 1 – 25 Jan 2001) – (Manual of Permitted Operations – MOPO) – Manual of Permitted Operations defines the limits of safe operation when barrier effectiveness is reduced. The limit of safe operation permitted during periods of escalated risk in either likelihood or consequence. The limit of safe operations if the barriers are reduced, removed, or purposely defeated. 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 GuidelinesSource Identification
Definition(s)
Source Identification
Process to find, list and characterize sources. Other Related Terms and Definitions: ISO Guide 73 – Process to find, list and characterize sources. 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 GuidelinesScreening Criteria
Definition(s)
Screening Criteria
Values, targets or performance standards used to evaluate or compare the significance of an identified hazard, event or associated risk to determine the tolerability. They may be defined both in quantitative and qualitative terms. Screening Criteria includes (but is not limited to): regulatory requirements, industry standards, client requirements, internal company requirements (based on company values and experience). Other Related Terms and Definitions: ISO-17776 – Target or standard used to judge the tolerability of an identified hazard or effect. IADC HSE Case Guidelines Issue 02 – (Acceptance Criteria) – The limits within which risks are acceptable. 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 GuidelinesScreening criteria
The values or standards against which the significance of the identified hazard or effect can be judged. They should be based on sound scientific and technical information and may be developed by the company and industry bodies, or provided by the regulators. Source: OGP Report No. 6.36/210, Guidelines for the Development and Application of Health, Safety and Environmental Management Systems, International Association of Oil & Gas Producers, July 1994. Global StandardsSafety Committee
Definition(s)
Safety Committee
A committee of management and staff representatives with the remit to advise on and assess the adequacy of preventive measures affecting health, safety and environment. 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 GuidelinesSSoM
Definition(s)
SSoM
State Supervision of Mines, Netherlands. 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 GuidelinesSOOB
Definition(s)
SOOB
Summary of Operation Boundaries. 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 GuidelinesSummary of Operation Boundaries (SOOB)
A summary of defeating factors (either single or in combination) that have the potential to exceed the tolerability limits of safe operations. These defeating factors are qualitatively determined using experience and establish the boundaries in which operations are carried out. Other Related Terms and Definitions: Shell EP95-0010 (Revision 1 – 25 Jan 2001) – (Manual of Permitted Operations – MOPO) – Manual of Permitted Operations defines the limits of safe operation when barrier effectiveness is reduced. The limit of safe operation permitted during periods of escalated risk in either likelihood or consequence. The limit of safe operations if the barriers are reduced, removed, or purposely defeated. 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 GuidelinesSHIDAC
Definition(s)
SHIDAC
Structured Hazard Identification, Assessment & Control. 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 GuidelinesSHIDAC
Structured Hazard Identification, Assessment and Control (SHIDAC) Process incorporating the basics of fault-tree and event-tree, implementing measures to control hazards and to recover in case of barrier failure. A key deliverable is the identification or determination of Critical Activities or Tasks that ensure the identified Barriers are established, maintained and effective. The steps are:- Identify the hazards
- Assess the potential consequences, their likelihoods and their associated risks
- Identify hazard Control Barriers to prevent release, and
- Identify Defence Barriers to protect people, assets, environment and reputation in the event of such a hazard release.
Supporting Structure
Definition(s)
Supporting structure
Strengthening of the vessel structure, e.g. a deck, in order to accommodate loads and moments from a heavy or loaded object. Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global StandardsSubmerged Zone
Definition(s)
Submerged Zone
The part of the unit which is below the splash zone, including buried parts. Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global StandardsSubmerged Zone
That part of the external structure below the maximum design operating draught . Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 8, Corrosion Controls, June 2013, Lloyd’s Register, Global StandardsStructural Safety
Definition(s)
Structural safety
Reliability, or structural safety, is defined as the probability that failure will not occur or that a specified criterion will not be exceeded. Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global StandardsSpecified Value
Definition(s)
Specified value
Minimum or maximum value during the period considered. This value may take into account operational requirements, limitations and measures taken such that the required safety level is obtained. Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global StandardsSlamming
Definition(s)
Slamming
Impact load on an approximately horizontal member from a rising water surface as a wave passes. The direction of the impact load is mainly vertical. Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global StandardsService Temperature
Definition(s)
Service temperature
Service temperature is a reference temperature on various structural parts of the unit used as a criterion for the selection of steel grades. Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global StandardsSCE
Definition(s)
SCE
Part of a facility, including computer programs, whose purpose is to prevent or limit the consequences of a major accident, or whose failure could cause or contribute substantially to a major accident Note 1 to entry: Safety critical elements include measures for prevention, detection, control and mitigation (including personnel protection) of hazards. [SOURCE: EU Directive 2013/30/EU, modified]. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global StandardsSCE
Saturated calomel electrode. Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global StandardsSCE
Safety-critical element. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards Source: API RP 2FB, Recommended Practice for the Design of Offshore Facilities Against Fire and Blast Loading, First Edition, April 2006. 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: Oil & Gas UK, Guidelines on subsea BOP systems, Issue 1, July 2012, Global StandardsSCE
Safety Critical Element. Source: NOGEPA Industrial Guideline No. 43, Surface BOP Review, Best Practices Checklist, Netherlands, Version 0, December 2011. Global StandardsSurface-oriented Diving Technique
Definition(s)
Surface-oriented Diving Technique
“Surface-oriented diving technique” means a diving procedure in which the use of a diving bell or diving submersible is not required (technique de la plongée avec soutien en surface). 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. RegulationsSecondary Petroleum Production Licence
Definition(s)
Secondary petroleum production licence
Secondary petroleum production licence means a petroleum production licence granted as a result of an application under any of the following provisions:- subclause 2(6) of this Schedule;
- subclause 4(6) of this Schedule;
- subsection 40(3) or 40B(4) of the repealed Petroleum (Submerged Lands) Act 1967.