Functional Test

Functional Test

Definition(s)

Functional Test

Test process performed to confirm proper operation of a tool.

Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global Standards

Functional Test

Test performed to confirm proper operation of equipment. Source: API SPEC 14A, Specification for Subsurface Safety Valve Equipment, Eleventh Edition, October 2005 (Reaffirmed June 2012). Global Standards
Functionality

Functionality

Definition(s)

Functionality

Operational requirements of the system/structure/equipment in order to establish and maintain integrity. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards

Functionality

The ability of a system to perform its specified role.  This may be characterized and demonstrated by identifying critical functional parameters. 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  

Functionality

What a device or system is designed to do. Source: OGP Report No. 415, Asset integrity – the key to managing major incident risks, International Association of Oil & Gas Producers, December 2008. Global Standards
Functioning Analysis

Functioning Analysis

Definition(s)

Functioning Analysis

set of activities aiming to analyse how an item performs as required Note 1 to entry: This is the counterpart of the dysfunctioning analysis which aims to analyse how an item fails when the functioning analysis aims to analyse how an item works by, e.g. identifying, sorting out and characterizing the various functions related to the item. Note 2 to entry: The term “functional” analysis is often used as a synonym of “functioning” analysis. However, the term “functional analysis” which has several meanings is not used in this Technical Report to avoid confusion. Source: ISO/TR 12489:2013(E) Reliability modelling and calculation of safety systems. Global Standards
Fundamental

Fundamental

Definition(s)

Fundamental

In this report, a Fundamental is a characteristic of an operating management system that is essential to the effectiveness of every part of the system. 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
Fundamental Flow Equation

Fundamental Flow Equation

Definition(s)

Fundamental Flow Equation

Gas flow equation using a calculated friction factor. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Furnace Test

Furnace Test

Definition(s)

Furnace Test

The maximum uplift force during spud can extraction.

Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global Standards
Furring

Furring

Definition(s)

Furring

Build-up or bristling of dry magnetic particles at the ends of a longitudinally-magnetized length of OCTG, i.e. at its poles. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
FV

FV

Definition(s)

FV

Maximum vertical impact force.

Source: API Standard 2CCU, Offshore Cargo Carrying Units, First Edition, August 2017. Global Standards

FV

Leg vertical reaction.

Source: ABS Guidance Notes on Geotechnical Performance of Spudcan Foundations, January 2017. Global Standards
FW

FW

Definition(s)

FW

Firewall. Source:  DNVGL-RP-G108, Cyber security in the oil and gas industry based on IEC 62443, DNV GL, September 2017. Global Standards

Fw

CCU wall internal load.

Source: API Standard 2CCU, Offshore Cargo Carrying Units, First Edition, August 2017. Global Standards
FWAC

FWAC

Definition(s)

FWAC

Full-wave rectified alternating current. Source: API RP 7G-2, Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition, August 2009. Global Standards  
G

G

Definition(s)

g

Acceleration of gravity.

Source: ABS Guidance Notes on Geotechnical Performance of Spudcan Foundations, January 2017. Global Standards

G

Soil shear modulus.

Source: ABS Guidance Notes on Geotechnical Performance of Spudcan Foundations, January 2017. Global Standards

GA

GA

Definition(s)

GA

General arrangement. Source: API SPEC 17J, Specification for Unbonded Flexible Pipe, Third Edition, July 2008. Global Standards    
Gage And Test Port Connections

Gage And Test Port Connections

Definition(s)

Gage And Test Port Connections

Holes drilled and tapped into API Spec equipment through which internal pressure may be measured or through which pressure may be applied to test the sealing mechanism. Source: API SPEC 16C, Specification for Choke and Kill Systems, First Edition, January 1993 (Reaffirmed 2001). Global Standards
Gage Joint

Gage Joint

Definition(s)

Gage Joint

The heaviest wall casing in the well usually located just beneath the preventers or tree.. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Gain

Gain

Definition(s)

Gain

Sensitivity adjustment produced by an amplifier or circuit. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Gall

Gall

Definition(s)

Gall

Surface damage on threads and seals caused by localized friction. Source: API RP 7G-2, Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition, August 2009. Global Standards  
Galling

Galling

Definition(s)

Galling

Cold welding of contacting material surfaces followed by tearing of the metal during further sliding/rotation. NOTE 1 Galling results from the sliding of metallic surfaces that are under high bearing forces. Galling can generally be attributed to insufficient lubrication between the mating surfaces. The purpose of the lubricating medium is to minimize metal-to-metal contact and allow efficient sliding of the surfaces. Other ways to prevent galling are to reduce the bearing forces or reduce the sliding distance. NOTE 2 There are several degrees of galling used for repair and reporting purposes as defined in 3.1.5.1 to 3.1.5.3. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global Standards

Galling

Gradual removal of material from a surface due to repetitive relative motion with an adjacent surface. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global Standards  

Galling

Cold welding of contacting material surfaces followed by tearing of the materials during further sliding/rotation. NOTE Galling results from the sliding of metallic surfaces that are under high bearing forces. Galling can generally be attributed to inadequate lubrication between the surfaces. The purpose of the lubrication medium is to minimize the metal-to-metal contact and allow efficient sliding of the surfaces. Other ways to prevent galling are to reduce the bearing forces or reduce the sliding distance. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards  

Galling

Cold welding of contacting material surfaces followed by tearing of the materials during further sliding/rotation. NOTE Galling results from the sliding of metallic surfaces that are under high bearing forces. Galling can generally be attributed to insufficient lubrication between the surfaces. The purpose of the lubrication medium is to minimize the metal-to-metal contact and allow efficient sliding of the surfaces. Other ways to prevent galling are to reduce the bearing forces or reduce the sliding distance. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards
Galvanic Isolation

Galvanic Isolation

Definition(s)

Galvanic Isolation

Arrangement within an item of intrinsically safe apparatus or associated apparatus which permits the transfer of signals or power between two circuits without any direct electrical connection between the two. Source: IEC 60079-14:2013, Explosive atmospheres – Part 14: Electrical installations design, selection and erection, Edition 5.0, November 2013. Global Standards
Gamma-Ray

Gamma-Ray

Definition(s)

Gamma-Ray

High-energy, short wavelength, electromagnetic radiation emitted by a nucleus, which is penetrating and is best attenuated by dense material like lead or tungsten. NOTE The energy of gamma-rays is usually between 0,010 MeV and 10 MeV. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Gangway (assembly)

Gangway (assembly)

Definition(s)

Gangway (assembly)

System intended to transfer personnel and cargo between 2 offshore vessels, typically including a bridge and a pedestal.

Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards
Gangway Axis

Gangway Axis

Definition(s)

Gangway Axis

  • X axis: principal axis oriented along the length of the gangway.
  • Y axis: secondary axis, perpendicular to X axis, oriented across the length of the gangway and in the floor/walkway plane.
  • Z axis: secondary axis, perpendicular to the plane defined by X and Y axis.
Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards
Gantry

Gantry

Definition(s)

Gantry (also known as A-Frame or Mast)

A structural frame, extending above the upper-structure to which the boom support ropes are reeved. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards  

Gantry (also known as A-Frame or Mast)

A structural frame, extending above the machinery deck or upper-structure to which the boom support ropes are reeved. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global Standards  
Gas

Gas

Definition(s)

Gas

“Gas” means natural gas and includes all substances, other than oil, that are produced in association with natural gas. Source: Canada Oil and Gas Operations Act, R.S.C., 1985, c. O-7, Canada, current to April 29, 2013. Legislation Source:  Canada Petroleum Resources Act, R.S.C. 1985, c. 36 (2nd Supp.), current to April 29, 2013. Legislation 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  

Gas

“Gas” means natural gas and includes all substances, other than oil, that are produced in association with natural gas, but does not include coal-bed methane associated with the development or operation of a coal mine; gaz. Source: Canada-Nova Scotia Offshore Petroleum Resources Accord Implementation Act, S.C. 1988, c. 28, Canada, current to May 26, 2013. Legislation

Gas

"Gas" means and includes all natural gas and all other fluid hydrocarbons not hereinbelow defined as oil. Source: Control of Oil and Gas Resources, North Dakota Century Code, Title 38, Chapter 8, February 2013. Legislation  

Gas

"Gas" means any petroleum hydrocarbon existing in the gaseous phase.
  1. Casinghead gas means any gas or vapor, or both, indigenous to an oil stratum and produced from such stratum with oil.
  2. Dry gas or dry natural gas means any gas produced in which there are no appreciable hydrocarbon liquids recoverable by separation at the wellhead.
  3. Condensate gas means any gas which is produced with condensate as defined as "condensate".
Source: Corporation Commission, Oil and Gas Conservation, Oklahoma Administrative Code 165:10, February 2013. Regulations  

Gas

A fluid, such as air, that has neither independent shape nor volume, but tends to expand indefinitely. Source: CPetroleum Safety Orders--Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. Regulations  

Gas

“Gas” means all natural gas and all other fluid hydrocarbons not defined below as oil, including condensate. Source: Division of Mineral Resources Management - Oil and Gas, Ohio Administrative Code, Chapter 1501:9, January 2012. Regulations  

Gas

State of matter that has no definite shape or volume. Source: IADC UBO / MPD Glossary, December 2011. Global Standards  

Gas

“Gas” means all natural gas and all other fluid hydrocarbons not defined below as oil, including condensate. Source: National Energy Board Act, R.S.C., 1985, c. N-7, Canada, current to April 29, 2013. Legislation  

Gas

Person, Producer, Gas, and Products―shall have the meaning prescribed for each of said words as defined in R.S. 30:3. Source: Natural Resources, Office of Conservation – General Operations, Louisiana Administrative Code, Title 43, Part XIX, March 2013. Regulations  

Gas

The words POOL, PERSON, OWNER, PRODUCER, OIL, GAS, WASTE, CORRELATIVE RIGHTS and COMMON SOURCE OF SUPPLY are defined by the Act, and said definitions are hereby adopted in these Rules and Regulations. From C.R.S. 34-60-103 (2012): "Gas" means all natural gases and all hydrocarbons not defined in this section as oil. Source: Oil and Gas Conservation Commission, Practice and Procedure, Code of Colorado Regulations, 2 CCR 404-1, February 2013. Regulations  

Gas

“Gas”, also known as natural gas, means a combustible vapor composed chiefly of hydrocarbons occurring naturally in a pool the division has classified as a gas pool. Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. Regulations  

Gas

“Gas” means any substance which is gaseous at a temperature of 15°C and a pressure of 101.325 kPa (1013.25 mb). For the purposes of paragraphs (2) and (4), references to gas include any substance which consists wholly or mainly of gas. Source: The Health and Safety at Work etc. Act 1974 (Application outside Great Britain) Order 2001, UK S.I. 2013/214, 2013. Regulations  

Gas

In this section “gas” means any substance which is or (if it were in a gaseous state) would be gas within the meaning of Part I of the Gas Act 1986. Source: UK Offshore Safety Act 1992, 1992 c. 15 (February 2013). Legislation  
Gas Buster

Gas Buster

Definition(s)

Gas Buster

A slang term to denote a mud: gas separator. Source: API RP 59, Recommended Practice for Well Control Operations, Second Edition, May 2006. Global Standards  

Gas Buster

Slang for mud / gas separator. Source: IADC UBO / MPD Glossary, December 2011. Global Standards  
Gas Cut

Gas Cut

Definition(s)

Gas Cut

Gas entrained in a drilling fluid. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Gas Cut Drilling Fluid

Gas Cut Drilling Fluid

Definition(s)

Gas Cut Drilling Fluid

Drilling Fluid that has become entrained with gas from previously drilled gas bearing formation which in turn lowers the drilling fluid density and hydrostatic head of the drilling fluid column. Source: API RP 59, Recommended Practice for Well Control Operations, Second Edition, May 2006. Global Standards Source: API RP 64, Recommended Practice for Diverter Systems Equipment and Operations, Second Edition, November 2001 (March 1, 2007). Global Standards  
Gas Detection Instrument

Gas Detection Instrument

Definition(s)

Gas detection instrument

An assembly of electrical, mechanical, and chemical components designed to sense and respond continuously to the presence of chemical gases in atmospheric mixtures. Source: API RP 49, Recommended Practice for Drilling and Well Servicing Operations Involving Hydrogen Sulfide, Third Edition, May 2001. Global Standards
Gas Drilling

Gas Drilling

Definition(s)

Gas Drilling

See Aerated Fluid. Source: API RP 64, Recommended Practice for Diverter Systems Equipment and Operations, Second Edition, November 2001 (March 1, 2007). Global Standards  
Gas Explosions

Gas Explosions

Definition(s)

Gas Explosions

Gas explosions can be defined as the combustion of a premixed gas cloud containing fuel and an oxidizer that can result in a rapid rise in pressure. Source: API RP 2FB, Recommended Practice for the Design of Offshore Facilities Against Fire and Blast Loading, First Edition, April 2006. Global Standards  

Gas Explosions

Combustion of a flammable gas or mist which generates blast waves due to confinement of the combustion induced flow or the acceleration of the flame front by obstacles in the flame path 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
Gas Group

Gas Group

Definition(s)

Gas Groups (division classification method)

For purposes of testing, approval, and area classification, various air mixtures (not oxygen enriched) are grouped as shown below. 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 Standards  

Group A

Atmospheres that do or may contain acetylene. 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 Standards  

Group B

Atmospheres that do or may contain hydrogen, or other substances specified by NFPA 497. 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 Standards  

Group C

Atmospheres that do or may contain hydrogen sulfide (H2S), or other substances specified by NFPA 497. 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 Standards  

Group D

Atmospheres that do or may contain natural gas, hydrocarbons or other substances specified by NFPA 497. 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 Standards  

Gas, Group I

A term used by ANSI/ISA S12.24.01 (IEC 60079-10 MOD) to describe atmospheres containing firedamp (a mixture of gases, composed mostly of methane, found underground, usually in mines). Since this RP does not apply to installations underground in mines, this term is not used further. 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 Standards  

Gas, Group II

The group used to describe gases found aboveground and subdivided into IIC, IIB, and IIA, as noted below, according to the nature of the gas or vapor, for protection techniques "d," "ia," and "ib" and, where applicable, "n" and "o." 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 Standards  

Gas, Group IIA

Atmospheres containing acetone, ammonia, ethyl alcohol, gasoline, methane, propane, or flammable gas, flammable liquid produced vapor, or combustible liquid produced vapor mixed with air that may burn or explode having either a maximum experimental safe gap (MESG) value greater than 0.90 mm or a minimum igniting current ratio (MIC ratio) greater than 0.80, see NFPA 497. 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 Standards  

Gas, Group IIB

Atmospheres containing acetaldehyde, ethylene, or flammable gas, flammable liquid produced vapor, or combustible liquid produced vapor mixed with air that may burn or explode having either a MESG value greater than 0.50 mm and less than or equal to 0.90 mm or a MIC ratio greater than 0.45 and less than or equal to 0.80, see NFPA 497. 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 Standards  

Gas, Group IIC

Atmospheres containing acetylene, hydrogen, or flammable gas, flammable liquid produced vapor, or combustible liquid produced vapor mixed with air that may burn or explode, having either a MESG value less than or equal to 0.50 mm or a MIC ratio less than or equal to 0.45, see NFPA 497. 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 Standards