Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
Non-Exposed Bolting
Definition(s)
Non-Exposed Bolting
Bolting that is not directly exposed to sour environments and is not intended to be buried, insulated, equipped with flange protectors, or otherwise denied direct atmospheric exposure. Source: API RP 17A Addendum 1, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, December 2010. Global StandardsMultistage Cross-Over Spool
Definition(s)
Multistage Cross-Over Spool
Flanged or other connected equipment with more than one restricted-area sealing means to provide suitable capability to suspend and seal around multiple inner strings of casing or tubing at several stages. NOTE A multistage cross-over spool may have a top connector with a pressure rating above that of the lower connector. Source: API RP 17A Addendum 1, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, December 2010. Global StandardsMaterial Performance
Definition(s)
Material Performance
Capabilities that it is necessary to demonstrate, as a minimum, for material to satisfy the criteria of this International Standard. Source: API RP 17A Addendum 1, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, December 2010. Global StandardsMaster Valve
Definition(s)
Master Valve
Lowermost valve on the vertical bore of the christmas tree. NOTE Upper master valves and lower master valves are in general use. Upper master valves are sometimes called surface safety valves. Source: API RP 17A Addendum 1, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, December 2010. Global StandardsManufacturing Operation
Definition(s)
Manufacturing Operation
Activity involving, but not limited to, the machining, welding, heat treating or other processes utilized to produce a finished product. Source: API RP 17A Addendum 1, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, December 2010. Global StandardsMake-And-Break, Verb
Definition(s)
Make-And-Break, Verb
Connect and disconnect a connection. Source: API RP 17A Addendum 1, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, December 2010. Global StandardsLoose Flange
Definition(s)
Loose Flange
Flange, as-manufactured, that is not intended to be made integral with equipment compliant to this International Standard. EXAMPLES Types of flanges include blind, threaded, spacer, welding neck, studded or other connected adapter flanges. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsLoose Connector
Definition(s)
Loose Connector
Connector, as-manufactured, that is not intended to be made integral with another piece of wellhead and christmas tree equipment. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsLock Screw Or Tie-Down Screw
Definition(s)
Lock Screw Or Tie-Down Screw
Threaded pin extending through the wall of a casing-head or tubing-head connection used to lock down hangers or energize seals. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsLinear Indication
Definition(s)
Linear Indication
Liquid penetrant or magnetic particle examination indication whose length is equal to or greater than three times its width. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global StandardsLinear Indication
Surface NDE indication whose length is equal to or greater than three times its width. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsLinear Indication
An indication, revealed by NDE, having a length at least three times its width. Source: API SPEC 7K, Drilling and Well Servicing Equipment Upstream Segment, Fifth Edition, June 2010 (August 2010). Global Standards Source:API SPECIFICATION 7K, Drilling and Well Servicing Equipment, Sixth Edition, December 2015. Global Standards Source: API SPEC 8C, Drilling and Production Hoisting Equipment (PSL 1 and PSL 2), Fifth Edition, April 2012. Global StandardsLinear Indication
Indication in which the length is equal to or greater than three times its width. Source: API SPEC 16R, Specification for Marine Drilling Riser Couplings, Exploration and Production Department, First Edition, January 1997. Global StandardsJob-Lot Traceability
Definition(s)
Job-Lot Traceability
Ability to trace parts as originating from a job lot that identifies the included heat(s). Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsJob-Lot Traceability
Ability for parts to be traced as originating from a job lot which identifies the included heat(s). Source: API SPEC 16A, Specification for Drill-through Equipment, Third Edition, June 2004 (Errata/Supplement November 2004). Global StandardsHot Isostatic Pressing (HIP)
Definition(s)
Hot Isostatic Pressing (HIP)
Special forming process used to compact and metallurgically bond metal powder. NOTE This process takes place within a flexible, metal container whose contents are formed into the desired shape by subjecting the container to high temperature and pressure in an autoclave. It produces a fully wrought structure. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsHold Period
Definition(s)
Hold Period
Period of time that the product is subjected to pressure and isolated from the pressure source. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsHold Period
The period of time that the product is subjected to pressure and isolated from the pressure source. Source: API SPEC 16C, Specification for Choke and Kill Systems, First Edition, January 1993 (Reaffirmed 2001). Global StandardsHeat-Sensitive Lock-Open Device
Definition(s)
Heat-Sensitive Lock-Open Device
Device installed on a surface safety valve (SSV) actuator to maintain the SSV valve in a full open position until exposed to sufficient heat to cause the device to release and allow the SSV valve to close. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsHeat-Affected Zone (HAZ)
Definition(s)
Heat-affected Zone (HAZ)
Region around a weld that has been affected by welding. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global StandardsHeat-affected Zone (HAZ)
Portion of the base metal that has not been melted, but whose mechanical properties or microstructure has been altered by the heat of welding or cutting. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsHeat-Affected Zone (HAZ)
That portion of the base metal which has not been melted, but whose mechanical properties or microstructure has been altered by the heat of welding or cutting. Source: API SPEC 16A, Specification for Drill-through Equipment, Third Edition, June 2004 (Errata/Supplement November 2004). Global Standards Source: API SPEC 16C, Specification for Choke and Kill Systems, First Edition, January 1993 (Reaffirmed 2001). Global Standards Source: API SPEC 16RCD, Specification for Drill Through Equipment—Rotating Control Devices, Upstream Segment, First Edition, February 2005. Global StandardsHeat Treatment Or Heat Treating
Definition(s)
Heat Treatment Or Heat Treating
Specified, timed sequence of controlled heating and cooling of materials for the purpose of changing physical or mechanical properties. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsHeat Treatment Or Heat Treating
Alternate steps of controlled heating and cooling of materials for the purpose of changing mechanical properties. Source: API SPEC 14A, Specification for Subsurface Safety Valve Equipment, Eleventh Edition, October 2005 (Reaffirmed June 2012). Global StandardsHeat Treatment Or Heat Treating
Alternate steps of controlled heating and cooling of materials for the purpose of changing physical or mechanical properties. Source: API SPEC 16A, Specification for Drill-through Equipment, Third Edition, June 2004 (Errata/Supplement November 2004). Global StandardsHeat-Treat Lot 〈Continuous Furnaces〉
Definition(s)
Heat-Treat Lot 〈Continuous Furnaces〉
Group of pieces of material with the same nominal size that is moved sequentially through the heat treatment process using the same process parameters. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsHeat-Treat Lot 〈Batch Furnaces〉
Definition(s)
Heat-Treat Lot 〈Batch Furnaces〉
Material placed on loading or carry devices and moved as a batch through one heat treat cycle. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsHanger 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 StandardsForm
Definition(s)
Form
Essential shape of a product including all its component parts. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global Standards Source: API SPEC 14A, Specification for Subsurface Safety Valve Equipment, Eleventh Edition, October 2005 (Reaffirmed June 2012). Global StandardsForm
The essential shape of a product including its component parts. Source: API SPEC 16C, Specification for Choke and Kill Systems, First Edition, January 1993 (Reaffirmed 2001). Global StandardsForm
“Form” means form given in the First Schedule. Source: The Petroleum Rules, 1976, India, 1976. Regulations Source: The Petroleum Rules, 2002, India, 13th March 2002. RegulationsForging, Noun
Definition(s)
Forging, (noun)
Shaped metal part formed by the forging method. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global Standards Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global Standards Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global Standards Source: API SPEC 16A, Specification for Drill-through Equipment, Third Edition, June 2004 (Errata/Supplement November 2004). Global StandardsForge, Verb
Definition(s)
Forge, Verb
Deform metal plastically into desired shapes with compressive force. NOTE Forging is usually a hot process. The use of dies is optional. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsForge, Verb
Plastically deform metal, usually hot, into desired shapes with compressive force, with open or closed dies. Source: API SPEC 16A, Specification for Drill-through Equipment, Third Edition, June 2004 (Errata/Supplement November 2004). Global StandardsFlange
Definition(s)
Flange
Protruding rim, with holes to accept bolts and having a sealing mechanism, used to join pressure-containing equipment with dimensions specified in this specification. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global StandardsFlange
Protruding rim, with holes to accept bolts and having a sealing mechanism, used to join pressure-containing equipment with dimensions specified in this standard.
Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global Standards