Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
LMP
Definition(s)
LMP
Larsen-Miller parameter. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global StandardsLP1
Definition(s)
LP1
Limit load test path 1. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global StandardsLP2
Definition(s)
LP2
Limit load test path 2. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global StandardsLP3
Definition(s)
LP3
Limit load test path 3. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global StandardsLP4
Definition(s)
LP4
Limit load test path 4. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global StandardsLP5
Definition(s)
LP5
Limit load test path 5. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global StandardsLP6
Definition(s)
LP6
Limit load test path 6. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global StandardsLP7
Definition(s)
LP7
Limit load test path 7. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global StandardsLP8
Definition(s)
LP8
Limit load test path 8. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global StandardsISR
Definition(s)
ISR
Intermediate stress relief. 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 StandardsISR
Activity carried out to reduce residual stresses and diffuse hydrogen from completed highly stressed weld joints so that the risk of cracking is minimized upon the weld joint cooling to ambient temperature.- NOTE: Intermediate stress relief (ISR) may be used to reduce the risk of decreasing the base material properties when multiple welding operations are performed on a component. For example, a flange may receive an ISR after the seal groove inlay, then receive the final PWHT after the flange has been circumferentially welded to its mating component.
Heat Treating
Definition(s)
Heat Treating
Specified, timed sequence of controlled heating and cooling of materials for the purpose of changing physical or mechanical properties. 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 StandardsFCAW
Extended Range
Definition(s)
Extended Range
Range outside the rated range in which the manufacturer defines the operational characteristics based on test data. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global StandardsEquipment, Oil-Immersed
Definition(s)
Equipment, Oil-Immersed
Equipment immersed in electrical insulating oil for the purpose of preventing an ignitable or corrosive gas or vapor from coming in physical contact with the equipment or for the purpose of reducing arcing of circuit breaking devices. 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 StandardsDHT
Definition(s)
DHT
Dehydrogenization heat treatments. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global StandardsDHT
Activity carried out to diffuse hydrogen and minimize the risk of hydrogen cold cracking in completed or partially completed weld joints prior to the weld joint cooling to ambient temperature. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global StandardsDesign Validation Results
Definition(s)
Design Validation Results
Document or dataset created and maintained that provides objective evidence of activities performed, results achieved, or statements made during the design validation. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global StandardsCritical Dimension
Definition(s)
Critical Dimension
Dimension(s) identified by the manufacturer as requiring verification and documentation.
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 StandardsCSWIP
Definition(s)
CSWIP
Certification scheme for welding inspection personnel. 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 StandardCWI
Definition(s)
CWI
Certified welding inspector. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global StandardsCAWI
Definition(s)
CAWI
Certified associate welding inspector. Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global StandardsBSL
Definition(s)
BSL
Bolting specification level. Source: API Specification 20E, Alloy and Carbon Steel Bolting for Use in the Petroleum and Natural Gas Industries, Second Edition, February 2017. Global Standards Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global StandardsSTF
Definition(s)
STF
Stress transfer function(also known as a load to stress curve). Source: API Technical Report 17TR7, Verification and Validation of Subsea Connectors, First Edition, April 2017. Global StandardsM
Definition(s)
M
Applied bending moment. Source: API Technical Report 17TR7, Verification and Validation of Subsea Connectors, First Edition, April 2017. Global StandardsLVDT
Definition(s)
LVDT
The maximum uplift force during spud can extraction.
Source: API Specification 16A, Specification for Drill-through Equipment, Fourth Edition, April 2017. Global StandardsLVDT
Linear variable differential transformer (also called linear variable displacement transducer). Source: API Technical Report 17TR7, Verification and Validation of Subsea Connectors, First Edition, April 2017. Global StandardsL-C
Definition(s)
L-C
Longitudinally oriented specimen with a circumferential flaw. Source: API Technical Report 17TR7, Verification and Validation of Subsea Connectors, First Edition, April 2017. Global Standardsda/dN
Definition(s)
da/dN
Increment of crack growth for a given cycle. Source: API Technical Report 17TR7, Verification and Validation of Subsea Connectors, First Edition, April 2017. Global StandardsC-R
Definition(s)
C-R
Circumferentially oriented specimen with a radial flaw.
Source: API Technical Report 17TR7, Verification and Validation of Subsea Connectors, First Edition, April 2017. Global StandardsAg/AgCL
Definition(s)
Ag/AgCL
Silver/silver chloride. Source: API Technical Report 17TR7, Verification and Validation of Subsea Connectors, First Edition, April 2017. Global StandardsYield Capacity
Definition(s)
Yield Capacity
Maximum load(s) of the connector that cause the primary membrane stress to reach the specified minimum yield stress.
Source: API Technical Report 17TR7, Verification and Validation of Subsea Connectors, First Edition, April 2017. Global Standards