Cut

Cut

Definition(s)

Cut (Noun)

Gouge or distortion in two or more thread crests in a line, either parallel to the pipe axis or at an angle across the threads. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Cut

Incision without removal of metal caused by a sharp object. Source: API RP 7G-2, Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition, August 2009. Global Standards  
Crest

Crest

Definition(s)

Crest

Top of a thread. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Couplant

Couplant

Definition(s)

Couplant

Material (usually a liquid) used between an ultrasonic transducer and the test specimen to assist transmission of ultrasonic sound waves between them. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Shutdown

Shutdown

Definition(s)

Shutdown

Shutdown of machinery refers to the situation when the machinery is shut down from normal operating condition to full stop. Two types of shutdown exist: trip and shutdown. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  
Contour-Grind

Contour-Grind

Definition(s)

Contour-Grind or Radius-Grind (verb)

Grind to remove sharp edges and/or abrupt changes in the wall thickness around imperfections or areas of exploratory grinding. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Contour

Contour

Definition(s)

Contour (verb)

Taper gradually by filing or grinding to remove abrupt changes in the wall thickness. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Classification

Classification

Definition(s)

Classification

Action taken to categorize a length of new OCTG based on conformance with the contracted inspection requirements. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Classification

A service provided by Classification Societies which establishes and administers standards, known as Rules, for the design, construction and periodic survey of merchant ships and other marine and offshore structures. Classification certifies adherence to these Rules, and means that a vessel possesses the structural and mechanical fitness required for its intended service. 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  

Classification

A service which comprises the development of independent technical standards for vessels - class rules and standards, and to verify compliance with the rules and standards throughout the vessels' life. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards
WO

WO

Definition(s)

WO

Work order. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  
Circular Magnetization

Circular Magnetization

Definition(s)

Circular Magnetization or Circumferential Magnetization

Production of a magnetic field in a pipe wall or coupling such that the magnetic field is oriented circumferentially. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Circular Magnetic Field

Circular Magnetic Field

Definition(s)

Circular Magnetic Field or Circumferential Magnetic Field

Magnetic field in or surrounding a current-carrying conductor, or OCTG, such that the magnetic field is oriented circumferentially within the wall of the OCTG. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
TTR

TTR

Definition(s)

TTR

Top Tension Factor Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards

TTR

Top Tensioned Riser Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards

TTR

Time to repair. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards  
Chock

Chock

Definition(s)

Chock

Block or wedge used beneath a length of pipe so that it cannot roll. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Chatter

Chatter

Definition(s)

Chatter

Wavy surface of the thread flank, root, crest, or chamfer, caused by a vibrating cutter insert. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Chamfer

Chamfer

Definition(s)

Chamfer

Conical surface at the end of pipe having round or buttress threads. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Central Conductor

Central Conductor

Definition(s)

Central Conductor

Conductor that is passed through the bore of OCTG in order to create a circular or circumferential magnetic field in the OCTG. NOTE This does not imply that the current rod is necessarily centred in the bore of the OCTG. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Box

Box

Definition(s)

Box

Female member of a riser coupling or an external line stab assembly.

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

Box

Internally-threaded end of integral-joint OCTG, or the coupling end of threaded-and coupled OCTG. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Box

The female member of a riser coupling, C&K line stab assembly or auxiliary line stab assembly. 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
Borescope

Borescope

Definition(s)

Borescope

Optical instrument with an illuminating lamp, used for inspecting the inside surface of OCTG. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Black Light

Black Light

Definition(s)

Black Light

Long-wave ultraviolet light (UV-A) with a wavelength between 320 nm and 400 nm. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Black-Crested Thread

Black-Crested Thread

Definition(s)

Black-Crested Thread

Non-full-crested thread whose original (black) mill surface has not been completely removed. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Black-Crested Thread

Non-full-crested threads have historically been, and continue to be, referred to as black crested threads because the original mill surface has not been removed. The term black crested thread is a useful descriptive term, however, it should be understood that there can also be non-full-crested threads that are not black. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Back-Wall Reflection

Back-Wall Reflection

Definition(s)

Back-Wall Reflection

Ultrasonic signal received from the back surface of the pipe wall. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
TEG

TEG

Definition(s)

TEG

Triethylene glycol. Source: API STD 689, Collection and Exchange of Reliability and Maintenance Data for Equipment, First Edition, July 2007. Global Standards Equipment, systems, and methods which, following initiation, can be used to control, mitigate, and extinguish fires. 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
Arc

Arc

Definition(s)

Arc (verb)

Create intense heat and light by passing an electric current across a gap. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Ampere-Turn

Ampere-Turn

Definition(s)

Ampere-Turn

Unit of magnetomotive force which is the product of the number of turns in a coil and the quantity of amperes of current flowing through it, representing the magnetizing strength of the coil. EXAMPLE 800 A in a 6-turn coil gives 4 800 ampere-turns. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
Agency

Agency

Definition(s)

Agency

Agency means— (a) a government department: (b) a Crown entity within the meaning of section 2(1) of the Public Finance Act 1989: (c) the New Zealand Police: (d) the New Zealand Defence Force Source: Health and Safety in Employment Act 1992, Public Act 1992 No 96, New Zealand, as of 1 July 2011. Legislation

Agency

Entity contracted to inspect new OCTG using the methods and criteria specified. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Agency

Entity contracted to inspect used drill stem elements using the methods and criteria specified. Source: API RP 7G-2, Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition, August 2009. Global Standards  

Agency

“Agency” means the Canadian Environmental Assessment Agency established by section 61; Agence. Source: Canadian Environmental Assessment Act, 1992, c. 37, Canada, as consolidated November 2003. Legislation

AC-Field

AC-Field

Definition(s)

AC-Field

Magnetic field induced by alternating current. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  
A-Scan

A-Scan

Definition(s)

A-Scan

Data presentation utilizing a horizontal base line that indicates distance, or time, and a vertical deflection from the base line that indicates amplitude. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

A-Scan

Ultrasonic instrument display where distance is represented on the horizontal axis and signal strength on the vertical axis. Source: API RP 7G-2, Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition, August 2009. Global Standards
Action

Action

Definition(s)

Action

External load applied to the structure (direct action) or an imposed deformation or acceleration (indirect action). EXAMPLE An imposed deformation can be caused by fabrication tolerances, settlement, temperature change or moisture variation. NOTE An earthquake typically generates imposed accelerations. [ISO 19900:2002, 2.1] Source: API RP 2MOP, Marine Operations, Upstream Segment, First Edition, July 2010.  Global Standards Source: ISO 19900:2013, Petroleum and natural gas industries – General requirements for offshore structures. Global Standards    

Action

External load applied to the structure (direct action) or an imposed deformation or acceleration (indirect action). EXAMPLE An imposed deformation can be caused by fabrication tolerances, settlement, temperature change or moisture variation. NOTE An earthquake typically generates imposed accelerations. [ISO 19900:2002] Source: ISO 19901-7:2013, Petroleum and natural gas industries – Specific requirements for offshore structures – Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units. Global Standards  

Action

External load applied to the structure (direct action) or an imposed deformation or acceleration (indirect action). EXAMPLE An imposed deformation can be caused by fabrication tolerances, settlement, temperature change or moisture variation. NOTE An earthquake typically generates imposed accelerations. [ISO 19900:2002, definition 2.1]. Source: ISO 19905-1:202, Petroleum and natural gas industries – Site-specific assessment of mobile offshore units – Part 1: Jack-ups. Global Standards
RM

RM

Definition(s)

Rm

Specified minimum tensile strength at room temperature. Source: API Standard 2CCU, Offshore Cargo Carrying Units, First Edition, August 2017. Global Standards

RM

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

Rm

Ultimate tensile strength. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global Standards  
RCM

RCM

Definition(s)

RCM

Reliability-centred maintenance. 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: Rules and Regulations for the Classification of Mobile Offshore Units, Part 1, Regulations, June 2013, Lloyd’s Register, Global Standards  

RCM

Reliability cantered maintenance. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global Standards
RAM(S)

RAM(S)

Definition(s)

RAM(S)

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