RA

RA

Definition(s)

Ra

Surface finish Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards  

Ra

Measurement of the average roughness of a surface. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards

RA

Component of a JSA, where a determination of the expected level (severity) of illness, injury, and/or property damage that an identified hazard can cause is coupled with the frequency (probability) of that level of hazard occurring.
  • NOTE: 1 This is then plotted on a matrix to determine the level of risk associated with that job.
  • NOTE: 2 If the level of risk is not acceptable, control measures are introduced to reduce the risk to an acceptable level.
Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  

RA

Risk assessment. Source: API RP 98, Personal Protective Equipment Selection for Oil Spill Responders, First Edition, August 2013. Global Standards

RA

Reliability and availability. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards
PSV

PSV

Definition(s)

PSV

Production swab valve. Source: API SPEC 17D, Design and Operation of Subsea Production Systems—Subsea Wellhead and Tree Equipment, Upstream Segment, Second Edition May 2011 (Errata September 2011). Global Standards

PSV

Process safety valve. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  
OPEX

OPEX

Definition(s)

OPEX

Operational expenditure. Source: API SPEC 17F, Specification for Subsea Production Control Systems, Second Edition, December 2006 (Reaffirmed April 2011). Global Standards Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards  
NDT

NDT

Definition(s)

 

NDT

Nondestructive testing. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards Source: API RP 7G-2, Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition, August 2009. Global Standards Source: API RP 8B, Recommended Practice for Procedures for Inspections, Maintenance, Repair and Remanufacture of Hoisting Equipment, Seventh Edition, March 2002 (Reaffirmed: August 2012). Global Standards Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards Source: API RP 2SIM, Structural Integrity Management of Fixed Offshore Structures, First Edition, November 2014. Global Standards Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards Source: API SPEC 7-1, Specification for Rotary Drill Stem Elements, First Edition, March 2006 (Addendum April 2011). Global Standards  

NDT

Non-destructive testing. 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: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global Standards Source: Oil & Gas UK, Guidelines on subsea BOP systems, Issue 1, July 2012, Global Standards Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 1, Regulations, June 2013, Lloyd’s Register, Global Standards Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards
MDT

MDT

Definition(s)

MDT

Mean down time. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards
MUT

MUT

Definition(s)

MUT

Mean up time. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  
MTTM

MTTM

Definition(s)

MTTM

Mean time to maintain. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  
MTTR

MTTR

Definition(s)

MTTR

Mean time to repair. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards Source: NORSOK D-001, Drilling facilities, Rev. 3, December 2012. Global Standards  

MTTR

Expectation of the time to restoration. Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards  
MTTF

MTTF

Definition(s)

MTTF

Mean time to failure. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards  

MTTF

Expectation of the time to failure [2]. NOTE The MTTF of an item can be longer or shorter than the design life of the system. Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards  
MTBF

MTBF

Definition(s)

MTBF

Mean time between failures. Source: API RP 17H, Remotely Operated Vehicle (ROV) Interfaces on Subsea Production Systems, First Edition, July 2004 (Reaffirmed January 2009). Global Standards Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards Source: NORSOK D-001, Drilling facilities, Rev. 3, December 2012. Global Standards  

MTBF

Expectation of the time between failures. NOTE The MTBF of an item can be longer or shorter than the design life of the system. Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards    
MI

MI

Definition(s)

MI

Maintainable item. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  
MEG

MEG

Definition(s)

MEG

Monoethylene glycol. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global Standards
LCC

LCC

Definition(s)

LCC

Life cycle cost. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards  
KPI

KPI

Definition(s)

KPI

Key performance indicators. 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 SPEC Q1, Specification for Quality Management System Requirements for Manufacturing Organizations for the Petroleum and Natural Gas Industry, Ninth Edition, June 2013 (Errata 2, March 2014). Global Standards Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards 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: OGP Report No. 456, Process Safety – Recommended Practice on Key Performance Indicators, International Association of Oil & Gas Producers, November 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  

KPI

Quantifiable measure that an organization uses to gauge or compare performance. Source: API SPEC Q1, Specification for Quality Management System Requirements for Manufacturing Organizations for the Petroleum and Natural Gas Industry, Ninth Edition, June 2013 (Errata 2, March 2014). Global Standards  

KPI

Key Performance Indicator, may also be called metrics. See References for detailed definition and asset integrity examples. Source: OGP Report No. 415, Asset integrity – the key to managing major incident risks, International Association of Oil & Gas Producers, December 2008. Global Standards
HIPPS

HIPPS

Definition(s)

HIPPS

High-integrity process-protection system. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  

HIPPS

High integrity pipeline protection system. Source: API RP 17H, Remotely Operated Vehicle (ROV) Interfaces on Subsea Production Systems, First Edition, July 2004 (Reaffirmed January 2009). Global Standards  
FMECA

FMECA

Definition(s)

FMECA

Failure modes effects criticality analysis. Source: API Technical Report 17TR7, Verification and Validation of Subsea Connectors, First Edition, April 2017. Global Standards

FMECA

Failure mode, effects and criticality analysis. 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 Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards Source: Oil & Gas UK, Guidelines on subsea BOP systems, Issue 1, July 2012, Global Standards  

FMECA

analysis usually performed after an FMEA (3.21) which can be based on the probability that the failure mode will result in system failure, or the level of risk associated with the failure mode, or a risk’s priority Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards  

FMECA

Failure mode effect and consequence analysis. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards

FMECA

Failure mode, effect and criticality analysis. Source: API RP 17H, Remotely Operated Vehicle (ROV) Interfaces on Subsea Production Systems, First Edition, July 2004 (Reaffirmed January 2009). Global Standards Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. 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: NOPSEMA Guidance note: Hazard Identification, N-04300-GN0107, Australia, Revision 5, December 2012. Regulatory Guidance
FTA

FTA

Definition(s)

FTA

Fault-tree analysis. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. 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  

FTA

Fault Tree Analysis. 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  

FTA

Tree-like diagram based upon the application of "and/or'' logic used to identify alternative sequences of hardware faults and human errors that result in system failures or hazardous events. NOTE When quantified, fault trees allow system-failure probability or frequency to be calculated. 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  
DHSV

DHSV

Definition(s)

DHSV

Down Hole Safety Valve. Source: Norwegian Oil and Gas Association, Guideline No. 135, Recommended Guidelines for Classification and categorization of well control incidents and well integrity incidents, Rev. 4, 27 June 2017, National or Regional Standards Source: NOGEPA Industrial Guideline No. 41, Well Construction Process Checklist, Drilling Best Practices, Netherlands, Version 0, December 2011. Global Standards

DHSV

Downhole safety valve. Source: 117 OLF, Norwegian Oil and Gas Association recommended guidelines for Well Integrity, No. 117, Revision No. 4, June 2011. Global Standards Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards 
CMMIS

CMMIS

Definition(s)

CMMIS

Computerized maintenance-management information system. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  
CM

CM

Definition(s)

CM

Hydrodynamic inertia coefficient. Source: API Specification 16Q, Design, Selection, Operation, and Maintenance of Marine Drilling Riser Systems, Second Edition, April 2017. Global Standards

CM

Condition monitoring. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  
CAPEX

CAPEX

Definition(s)

CAPEX

Capital expenditure. Source: API SPEC 17F, Specification for Subsea Production Control Systems, Second Edition, December 2006 (Reaffirmed April 2011). Global Standard Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards
Up Time

Up Time

Definition(s)

Up Time

Time interval during which an item is in an up state. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards

Taxonomy

Taxonomy

Definition(s)

Taxonomy

Systematic classification of items into generic groups based on factors possibly common to several of the items. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards

Tag Number

Tag Number

Definition(s)

Tag Number

Number that identifies the physical location of equipment. NOTE For more detailed definitions and interpretations, see Annex C. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards

Surveillance Period

Surveillance Period

Definition(s)

Surveillance Period

Interval of time (calendar time) between the start date and end date of RM data collection. NOTE For more detailed definitions and interpretations, see Annex C. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  
Subunit

Subunit

Definition(s)

Subunit

Assembly of items that provides a specific function that is required for the equipment unit within the main boundary to achieve its intended performance. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  
Required Function

Required Function

Definition(s)

Required Function

Function or combination of functions of an item that is considered necessary to provide a given service. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  

Required Function

Function, or combination of functions, of an item that is considered necessary to provide a given service. Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards

Reliability

Reliability

Definition(s)

Reliability

Ability of a component or system to perform its required function without failure during a specified time interval routine personnel transfer everyday routine personnel transfer, without specific supporting documentation (i.e. DNV GL approved personnel transfer procedure) Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards

Reliability

Ability of an item to perform a required function under given conditions for a given time interval. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. 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 Standards

Reliability

The ability of a component or a system to perform its required function under given conditions for a given time interval. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards  

Reliability

Indicator of the extent to which examination scores are consistent across different examination times and locations, different examination forms and different examiners [SOURCE: ISO/IEC 17024:2012, 3.18]. Source: ISO/IEC TS 17027:2014, Conformity assessment – Vocabulary related to competence of persons used for certification of persons, Global Standards

Reliability

Property of consistent intended behaviour and results. Source: ISO/IEC 27000:2014, Information technology — Security techniques — Information security management systems — Overview and vocabulary, Third Edition, January 2014. Global Standards  

Reliability 3.1.8

R(t) 〈measure〉 probability for an item to perform a required function under given conditions over a given time interval z S m = − Note 1 to entry: This is a time-dependent parameter. Note 2 to entry: This parameter is related on a continuous functioning from 0 to t. Note 3 to entry: For non-repairable items, Reliability and Availability are identical Note 4 to entry: In IEC 60500–191[14], the reliability is defined both as ability and as measure. Source: ISO/TR 12489:2013(E) Reliability modelling and calculation of safety systems. Global Standards  

Reliability

Ability of a structure or a structural component to fulfill the specified requirements. Source: ISO 19900:2013, Petroleum and natural gas industries – General requirements for offshore structures. Global Standards  

Reliability

The ability of a component or a system to perform its required function without failure during a specified time interval. Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global Standards  

Reliability

Proportion of occasions a barrier or equipment item will function as designed (%). Source: OGP Report No. 415, Asset integrity – the key to managing major incident risks, International Association of Oil & Gas Producers, December 2008. Global Standards  

Reliability

Ability of an item to perform a required function under given conditions for a given time interval.
  • NOTE: 1 The term “reliability” is also used as a measure of reliability performance and may also be expressed as a probability.
Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards  

Reliability

Ability of a system to perform a required function under stated conditions for a specified period of time.

Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard  

Reliability

Ability of an item to perform a required function under given conditions for a given time interval.
  • NOTE: 1 The term “reliability” is also used as a measure of reliability performance and can also be defined as a probability.
  • NOTE: 2 For more detailed definitions and interpretations, see Annex C.
Note that the definition of availability given in IEC 60050-191:1990, 3.1.1, can be misleading because it can lead one to think that “availability” and “reliability” are the same concepts. This is not true because the meaning of “over a given time interval” is not at all the same for the concepts of “availability” and “reliability”. Even if the definitions of “availability” and “reliability” seem very close, these concepts are completely different, specifically: availability: item working at a given instant (no matter what has happened before); reliability: item working continuously over a whole period of time. “Availability” characterizes a function that can be interrupted without any problem and “reliability,” a function that cannot be interrupted over a whole period of time. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards
Redundancy

Redundancy

Definition(s)

Redundancy

The ability of a component or system to maintain or restore its function when a single failure has occurred. Redundancy can be achieved, for instance, by the installation of multiple components, systems or alternative means of performing a function.

Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance  

Redundancy

Redundancy means the ability of a component or system to maintain or restore its function when a single failure has occurred. Redundancy can be achieved, for instance, by the installation of multiple components, systems or alternative means of performing a function.

Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance

Redundancy

Ability of a component or system to maintain its function when one failure has occurred. Redundancy can be achieved, for instance, by installation of multiple components, systems or alternative means of performing a function. Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards  

Redundancy

Additional or alternative systems, sub-systems, assets, or processes that maintain a degree of overall functionality in case of loss or failure of another system, sub-system, asset, or process. From: DHS Risk Lexicon. Source: NICCS™ Portal Cybersecurity Lexicon, National Initiative for Cybersecurity Careers and Studies (https://niccs.us-cert.gov/glossary) as of 11 November 2015, Global Standards  

Redundancy

The availability of alternate load paths in a platform following the failure of one or more structural components. Source: API RP 2SIM, Structural Integrity Management of Fixed Offshore Structures, First Edition, November 2014. Global Standards  

Redundancy

Existence of more than one means for performing a required function
  • Note: 1 to entry: The aim of redundancy is to provide backup in case of one or several failures of the means
performing a required function.
  • Note: 2 to entry: Redundancy definitions for passive (cold) standby, active (hot) standby and mixed are given in
ISO 14224[15], C.1.2.
  • Note: 3 to entry: Redundancy is sometimes (in IEC 61508[2] and IEC 61511[3]) called “fault tolerance”.
[SOURCE: ISO 14224] Source: ISO/TR 12489:2013(E) Reliability modelling and calculation of safety systems. Global Standards  

Redundancy

The ability of a component or system to maintain or restore its function when a failure of a member or connection has occurred. Redundancy may be achieved for instance by strengthening or introducing alternative load paths. Source: Offshore Standard DNV-OS-C101, Design of Offshore Steel Structures, General (LRFD Method, Det Norske Veritas, April 2011. Global Standards

Redundancy

Additional or alternative systems, sub-systems, assets, or processes that maintain a degree of overall functionality in case of loss or failure of another system, sub-system, asset, or process Sample Usage: A lack of redundancy in access control mechanisms is a vulnerability that can result in a higher likelihood of a successful attack. Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory Guidance  

Redundancy

Existence of more than one means for performing a required function. Source: ISO 20815:2008, Petroleum, petrochemical and natural gas industries – Production assurance and reliability management. Global Standards  

Redundancy

Existence of more than one means for performing a required function of an item. NOTE For more detailed definitions and interpretations, see C.1.2. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  

Redundancy

Ability of a structure to find alternative load paths following failure of one or more non-critical components, thus limiting the consequences of such failures.
  • NOTE: All structures having redundancy are statically indeterminate. [ISO 19902:2007, definition 3.39].
Source: ISO 19905-1:202, Petroleum and natural gas industries – Site-specific assessment of mobile offshore units – Part 1: Jack-ups. Global Standards