Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
IEU
Definition(s)
IEU
Internal-external upset. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsWelding Procedure Specification (WPS)
Definition(s)
Welding Procedure Specification (WPS)
Written welding procedure that is qualified to provide direction for welding in accordance with requirements of this standard and describing the specific essential, nonessential, and supplementary essential variables required for each welding process.- NOTE: These variables and their meanings are defined in ASME BPVC Section IX, Article II and Article IV.
Welding Procedure Specification
Document providing the required welding variables for a specific application to assure repeatability by properly trained welders and welding operators.- NOTE: These variables and their meanings are defined, respectively, in Article II of the ASME Boiler & Pressure Vessel Code, Section IX—Welding and Brazing Qualifications.
Welding Procedure Specification (WPS)
Written procedure that provides instructions to the welding operator for making production welds in accordance with the requirements of this International Standard.- NOTE: It includes all essential variables and non-essential variables for friction welding of tool joints to drill-pipe body. A WPS applies to all those welds, of which each element has the same specified dimensions and chemistry, that are grouped according to a documented procedure that ensures a predictable response to weld-zone treatment for a particular grade.
Welding Machine And Welding Operator Performance Qualification (WPQ)
Definition(s)
Welding Machine And Welding Operator Performance Qualification (WPQ)
Written procedure used to demonstrate that a welding machine and welding operator combination has the capability to use the WPS to produce a weld meeting the requirements of this International Standard. NOTE It includes records from the qualification tests. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsWeld Zone
Definition(s)
Weld Zone
Zone comprising the weld line and the heat-affected areas on either side of the weld line caused by the friction welding and subsequent heat-treatment processes. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsUpset Ovality
Definition(s)
Upset Ovality
Difference between the largest and smallest diameter in a plane perpendicular to the axis of the upset. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsTool-Joint Pin
Definition(s)
Tool-Joint Pin
Threaded connection on tool joints that has external threads. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsTool-Joint Manufacturer
Definition(s)
Tool-Joint Manufacturer
Firm, company or corporation that operates facilities for making tool joints and is responsible for compliance with the requirements of this International Standard applicable to the tool joint. See 8.14. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsTool Joint Box
Definition(s)
Tool Joint Box
Threaded connection on tool joints that has internal threads. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsSample
Definition(s)
Sample
One or more units of product selected from a lot to represent that lot. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsRotary Friction Welding
Definition(s)
Rotary Shouldered Connection
Solid state welding under compressive-force contact of work-pieces rotating relative to one another along a common axis to increase temperature and plastically displace material from the faying surfaces. NOTE Either direct drive or inertia friction welding is acceptable. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsProcedure Qualification Record (PQR)
Definition(s)
Procedure Qualification Record
Record of the welding data used to make the test weldment, containing the actual values or ranges of the essential and supplementary essential variables used in preparing the test weldments, including the test results. 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 StandardsProcedure Qualification Record (PQR)
Written documentation stating an assessment that a specific WPS produces welds in accordance with the requirements of this International Standard. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsAlert
Definition(s)
Alert
Alerts announce abnormal situations and conditions requiring attention. Alerts are divided in four priorities: emergency alarms, alarms, warnings and cautions. Source: IMO resolution A.1021(26), Code on Alarms and Indicators, 2009, 18 January 2010, International Maritime Organization, Regulatory GuidanceAlert
Alerts are announcing abnormal situations and conditions requiring attention. Alerts are divided in four priorities: emergency alarms, alarms, warnings and cautions. An alert provides information about a defined state change in connection with information about how to announce this event in a defined way to the system and the operator. Source: IMO Resolution MSC.302(87), Performance standards for bridge alert management, 17 May 2010, International Maritime Organization. Regulatory GuidanceAlert
A notification that a specific attack has been detected or directed at an organization’s information systems. Adapted from: CNSSI 4009 Source: NICCS™ Portal Cybersecurity Lexicon, National Initiative for Cybersecurity Careers and Studies (https://niccs.us-cert.gov/glossary) as of 11 November 2015, Global StandardsNon-Essential Variable
Definition(s)
Non-Essential Variable
Variable parameter in which a change may be made in the WPS without re-qualification. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsMean Hardness Number
Definition(s)
Mean Hardness Number
Result of averaging the hardness numbers for the single specimen or location being evaluated. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsLot Size
Definition(s)
Lot Size
Number of units in a lot. Source: API SPEC 5DP, Specification for Drill Pipe, First Edition, August 2009. Global StandardsIndication
Definition(s)
Indication
A response or evidence resulting from the application of a nondestructive evaluation technique.
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 StandardsIndication
Visual sign of cracks, pits, or other abnormalities found during nondestructive examination. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global StandardsIndication
Visual sign of cracks, pits, or other abnormalities found during nondestructive examination (NDE). Source: API STANDARD 16AR, Standard for Repair and Remanufacture of Drill-through Equipment, First Edition, April 2017. Global StandardsIndication
An identified discontinuity or flaw in a material determined by a nondestructive material inspection technique.
Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global Standards