Gumbo

Gumbo

Definition(s)

Gumbo

Cuttings that agglomerate and form a sticky mass as they are circulated up the wellbore. Source: API RP 13C, Recommended Practice on Drilling Fluids Processing Systems Evaluation, Upstream Segment, Fourth Edition, December 2010. Global Standards  
Gunk Plug

Gunk Plug

Definition(s)

Gunk Plug

A volume of gunk slurry placed in the well bore. Source: API RP 59, Recommended Practice for Well Control Operations, Second Edition, May 2006. Global Standards  
Gunk Slurry

Gunk Slurry

Definition(s)

Gunk Slurry

A slang term to denote a mixture of diesel oil and bentonite. Source: API RP 59, Recommended Practice for Well Control Operations, Second Edition, May 2006. Global Standards
Gunk Squeeze

Gunk Squeeze

Definition(s)

Gunk Squeeze

Procedure whereby a gunk slurry is pumped into a subsurface zone. Source: API RP 59, Recommended Practice for Well Control Operations, Second Edition, May 2006. Global Standards  
Gust

Gust

Definition(s)

Gust

Brief rise and fall in wind speed lasting less than 1 min NOTE In some countries, gusts are reported in meteorological observations if the maximum wind speed exceeds approximately 8 m/s. Source: API RP 2MET, Derivation of Metocean Design and Operating Conditions, First Edition, November 2014. Global Standards
Gust Wind Speed

Gust Wind Speed

Definition(s)

Gust Wind Speed

Maximum value of the wind speed of a gust averaged over a short (3 s to 60 s) specified duration within a longer (1 min to 1 h) specified duration NOTE 1 For design purposes, the specified duration depends on the dimensions and natural period of the (part of the) structure being designed such that the structure is designed for the most onerous conditions; thus, a small part of a structure is designed for a shorter gust wind speed duration (and hence a higher gust wind speed) than a larger (part of a) structure. NOTE 2 In practice, for design purposes, the gust wind speeds for different durations (e.g. 3 s, 5 s, 15 s, 60 s) are derived from the wind spectrum. Source: API RP 2MET, Derivation of Metocean Design and Operating Conditions, First Edition, November 2014. Global Standards
Gutter

Gutter

Definition(s)

Gutter

Part of a subsea arch that the flexible pipe rests on and may be clamped to. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global Standards
Guyline

Guyline

Definition(s)

Guyline

Wire rope(s) that is attached to elevated structures, such as derricks or mast, and ground anchors for stability. See API Recommended Practices 4A, 4D, 4E, 4F, 4G, and 9B. Source: API RP 54, Recommended Practice for Occupational Safety for Oil and Gas Well Drilling and Servicing Operations, Third Edition, August 1999 (2007). Global Standards
Guyline Anchors

Guyline Anchors

Definition(s)

Guyline anchors

The ground components of the guyline system to which the wire rope(s) is attached. Source: API RP 54, Recommended Practice for Occupational Safety for Oil and Gas Well Drilling and Servicing Operations, Third Edition, August 1999 (2007). Global Standards
GVF

GVF

Definition(s)

GVF

Gas volume fraction. Source: API RP 17A, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, Fourth Edition, Reaffirmed 2011. Global Standards
GVI

GVI

Definition(s)

GVI

General visual inspection. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global Standards
GWT

GWT

Definition(s)

GWT

Guided wave examination. Source: API 570, Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems, Fourth Edition, February 2016, with Addendum May 2017. Global Standards
h

h

Definition(s)

h

Pad eye weld thickness. Source: API Standard 2CCU, Offshore Cargo Carrying Units, First Edition, August 2017. Global Standards
H2S

H2S

Definition(s)

H2S

Hydrogen sulfide. Source: API Specification 16Q, Design, Selection, Operation, and Maintenance of Marine Drilling Riser Systems, Second Edition, April 2017. Global Standards Source: API RP 49, Recommended Practice for Drilling and Well Servicing Operations Involving Hydrogen Sulfide, Third Edition, May 2001. Global Standards Source: API STD 53, Blowout Prevention Equipment Systems for Drilling Wells, Upstream Segment, Fourth Edition, November 2012. Global Standards Source: API RP 98, Personal Protective Equipment Selection for Oil Spill Responders, First Edition, August 2013. Global Standards  

H2S

An abbreviation for hydrogen sulfide. Source: API RP 59, Recommended Practice for Well Control Operations, Second Edition, May 2006. Global Standards  

H2S

Hydrogen Sulphide. Source: API RP 67, Recommended Practice for Oilfield Explosives Safety, Upstream Segment, Second Edition, May 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: OGP Report No. 476, Recommendations for enhancements to well control training, examination and certification, International Association of Oil & Gas Producers, October 2012. Global Standards  

H2S

Colorless, flammable, extremely hazardous gas with a “rotten egg” smell that occurs naturally in crude petroleum, natural gas, and hot springs and is produced by bacterial breakdown of organic materials and human and animal wastes (e.g. sewage). NOTE 1 Some common names for the gas include sewer gas, stink damp, swamp gas, and manure gas. NOTE 2 Industrial activities that can produce the gas include petroleum/natural gas drilling and refining, wastewater treatment, coke ovens, tanneries, and paper mills. Hydrogen sulfide can also exist as a liquid compressed gas. Source: API RP 98, Personal Protective Equipment Selection for Oil Spill Responders, First Edition, August 2013. Global Standards  

H2S

“H2S” means hydrogen sulfide. Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. Regulations  
H2S Trim

H2S Trim

Definition(s)

H2S Trim

All components, except external valve body, meeting the H2S service requirements of ISO 15156-2 and ISO 15156-3. NOTE For the purposes of this provision, NACE MR0175 is equivalent to ISO 15156–2 and ISO 15156–3. Source: API SPEC 7-1, Specification for Rotary Drill Stem Elements, First Edition, March 2006 (Addendum April 2011). Global Standards
Hacking

Hacking

Definition(s)

Hacking

Intentionally accessing a computer system without the authorization of the user or the owner. Source: ISO/IEC 27032:2015, Information technology — Security techniques — Guidelines for cybersecurity, First Edition, July 2012. Global Standards
Hactivism

Hactivism

Definition(s)

Hactivism

Hacking for a politically or socially motivated purpose. Source: ISO/IEC 27032:2015, Information technology — Security techniques — Guidelines for cybersecurity, First Edition, July 2012. Global Standards
Hand Lay-up

Hand Lay-up

Definition(s)

Hand Lay-up

Process for fabricating a composite structure in which discontinuous reinforcements, e.g. woven mats, chopped strand mats, are impregnated with a matrix material and are manually applied on a mandrel or mold. 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
Hand-Tight

Hand-Tight

Definition(s)

Hand-Tight

Threaded joint that has been made-up by hand without the aid of tongs. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Hand-Tight Standoff

Hand-Tight Standoff

Definition(s)

Hand-Tight Standoff

Length, at hand-tight engagement from the face of the coupling to the vanish point of the  threads for round threads and the base of the triangle for buttress threads. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Handling Damage

Handling Damage

Definition(s)

Handling Damage

Damage to the OCTG body, coupling or threads that occurred during loading, unloading, movements in transit, etc. EXAMPLES cuts, gouges, dents, flattened (mashed) thread crests or similar. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Handling Tight

Handling Tight

Definition(s)

Handling Tight

Sufficiently tight so that the coupling cannot be removed except by use of a wrench. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global Standards  
Handling Tool

Handling Tool

Definition(s)

Handling Tool (Running Tool)

A device that joins to the upper end of a riser joint to permit lifting and lowering of the joint and the assembled riser string in the derrick by the elevators. Source: API RP 16Q, Recommended Practice for Design, Selection, Operation and Maintenance of Marine Drilling Riser Systems, First Edition, November 1993 (Reaffirmed August 2001). Global Standards 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 Standards  
Hands on Proficiency

Hands on Proficiency

Definition(s)

Hands on Proficiency

“Hands On” proficiency is defined as a physical means of verifying the following: 1. Crane Operator’s dexterity and coordination. 2. Crane Operator’s familiarity with overall machine functions and characteristics. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards  
Hang-off

Hang-off

Definition(s)

Hang-Off

An action whereby the weight of that portion of the drill string below a ram BOP is supported by a tool joint resting on the closed pipe ram or through the use of a special hang-off tool that lands in the wellhead. Source: API STD 53, Blowout Prevention Equipment Systems for Drilling Wells, Upstream Segment, Fourth Edition, November 2012. Global Standards  

Hang-Off

Riser when disconnected from seabed. NOTE Hang-off is usually differentiated from disconnected. Disconnected is normally the condition directly after disconnecting the riser. Hang-off is normally associated with the riser suspended from the rotary table. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global Standards  
Hanger Mandrel

Hanger Mandrel

Definition(s)

Hanger Mandrel

Portion of a casing or tubing hanger that is attached by a threaded connection to the tubular string and forms the upper end of that tubular string. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global Standards
Hard Close-In

Hard Close-In

Definition(s)

Hard Close-In

To Close-in a well by closing a BOP with the choke and/or choke line valve closed. Source: API RP 59, Recommended Practice for Well Control Operations, Second Edition, May 2006. Global Standards  
Hard Hang-Off

Hard Hang-Off

Definition(s)

Hard Hang-Off (Riser Hang-Off)

The riser is effectively locked to the vessel and moves with it. Hard hang-off is applicable to either the deployment/retrieval configuration or the storm configuration. 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 Standards  
Hard Shut In

Hard Shut In

Definition(s)

Hard Shut In

To close in a well with the bop having the choke or choke line valve closed. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Hard-Banding

Hard-Banding

Definition(s)

Hard-Banding (or Hard-Facing)

Sacrificial or wear-resistant material applied to component’s surface to prevent wear of the component. Source: API RP 7G-2, Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition, August 2009. Global Standards  

Hard-Banding (or Hard-Facing)

Application of material onto tool joints to reduce external wear of the tool joint. NOTE Also known as hard facing. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global Standards