Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
Protection, Special
Definition(s)
Protection, Special
An IEC protection technique other than those that have been standardized. This type of protection is referred to by IEC 60079-0 as “s.”. 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 StandardsProtection, Type of
Definition(s)
Protection, Type of
The specific measures applied to electrical apparatus to avoid ignition of a surrounding explosive atmosphere. Examples are “e” and “n.” 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 StandardsProtective (Intermediate) Casing
Definition(s)
Protective (intermediate) casing
See casing. Source: API RP 54, Recommended Practice for Occupational Safety for Oil and Gas Well Drilling and Servicing Operations, Third Edition, August 1999 (2007). Global StandardsProtective Extra-low Voltage System (PELV)
Definition(s)
Protective Extra-low Voltage System (PELV)
Electric system in which the voltage cannot exceed the value of extra-low voltage:- under normal conditions, and
- under single fault conditions, except earth faults in other electric circuits.
Protective Measure
Definition(s)
Protective Measure
NOTE Protective measures include risk reduction by inherently safe design, protective devices, personal protective equipment, information for use and installation, and training. Source: ISO/IEC Guide 51:1999, Safety aspects – Guidelines for their inclusion in standards, Global StandardsProtector
Definition(s)
Protector, Box or Pin
A cap or cover used to protect the box or pin from damage during storage and handling. 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 StandardsProtector, Box
Cap or cover used to protect the box or pin from damage during storage and handling. 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 StandardsProtector, Pin
Cap or cover used to protect the box or pin from damage during storage and handling. 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 StandardsProtector, Pin or Box
Definition(s)
Protector, Pin or Box
Cap or cover used to protect the box or pin from damage during storage and handling.
Source: API Specification 16Q, Design, Selection, Operation, and Maintenance of Marine Drilling Riser Systems, Second Edition, April 2017. Global StandardsPrototype Rope
Definition(s)
Prototype Rope
A rope fully complying with the rope design specification made for the purpose of testing either before an order is placed or before regular rope production begins for an order.
Source: API RP 2SM Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, Second Edition, July 2014. Global StandardsPrototype Test
Definition(s)
Prototype Test
Test carried out in order to establish or verify a principal performance characteristic for a particular design, which may be a new or established design. Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global StandardsPrototype Test
Test to establish or verify a principal performance characteristic for a particular pipe design, which may be a new or established design. Source: API RP 17B, Recommended Practice for Flexible Pipe, Fourth Edition, July 2008. Global StandardsProven Technology
Definition(s)
Proven Technology
In the field, proven technology has a documented track record for a defined environment. Such documentation shall provide confidence in the technology from practical operations, with respect to the ability of the technology to meet the specified requirements (see DNV RP-A203). Source: API SPEC 17E, Specification for Subsea Umbilicals, Upstream Segment, Fourth Edition, October 2010. Global StandardsProximity
Definition(s)
Proximity
Closeness in distance. NOTE 1 Mooring systems are considered to be in proximity to a surface installation (or facility) if any part of the other installation lies within a contour described by the set of offsets coinciding with each line reaching 100 % MBS in the intact or redundancy check condition, whichever is larger. NOTE 2 Mooring systems are considered to be in proximity to a sea floor installation (or facility) if any part of the other installation lies within a polygon formed by the anchor locations. 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 StandardsPRT
Definition(s)
PRT
Profile radiographic 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 StandardsPRV
Definition(s)
PRV
Pressure-relief valve. Source: ABS Guide for Classification and Certification of Managed Pressure Drilling Systems, September 2017. Global Standards Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global StandardsPRV
A flow-control device installed as part of the circulating system able to open and shut in response to operating conditions in order to maintain preset limits for pressure applied to parts of the circulating system to prevent over pressurization.
Source: ABS Guide for Classification and Certification of Managed Pressure Drilling Systems, September 2017. Global StandardsPrying
Definition(s)
Prying
Magnification of an external load by a pseudo-lever action when the load is an eccentric tensile load. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global StandardsPS
Definition(s)
PS
Process safety. Source: OGP Report No. 456, Process Safety – Recommended Practice on Key Performance Indicators, International Association of Oil & Gas Producers, November 2011. Global StandardsPSA
Definition(s)
PSA
Petroleum Safety Authority. Source: Norwegian Oil and Gas Association, Guideline No. 135, Recommended Guidelines for Classification and categorization of well control incidents and well integrity incidents, Rev. 4, 27 June 2017, National or Regional Standards Source: 117 OLF, Norwegian Oil and Gas Association recommended guidelines for Well Integrity, No. 117, Revision No. 4, June 2011. Global StandardsPSA
Petroleum Safety Authority Norway. 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: NORSOK D-002, Well intervention equipment, Rev. 2, June 2013. Global StandardsPSD
Definition(s)
PSD
Production shut-down. Source: API RP 17A, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, Fourth Edition, Reaffirmed 2011. Global StandardsPSD
Production shutdown. Source: API SPEC 17F, Specification for Subsea Production Control Systems, Second Edition, December 2006 (Reaffirmed April 2011). Global StandardsPSE
Definition(s)
Process Safety Event (PSE)
For consistency with API RP 754 definitions, an incident is referred to as a Process Safety Event (PSE). Source: OGP Report No. 456, Process Safety – Recommended Practice on Key Performance Indicators, International Association of Oil & Gas Producers, November 2011. Global StandardsProcess Safety Event (PSE)
A Loss of Primary Containment (LOPC) from a process that meets the Tier 1 or Tier 2 definitions in this guide. A PSE is a Key Performance Indicator (KPI) and is recordable For the purpose of recording a PSE: drilling facilities are considered to be part of a process when operations are ‘in-hole’; land or marine vessels (trucks and ships) are considered to be part of a process when physically connected to a production facility. Source: OGP Report No. 456, Process Safety – Recommended Practice on Key Performance Indicators, International Association of Oil & Gas Producers, November 2011. Global StandardsPSER
Definition(s)
Process Safety Event Rate (PSER)
The number of process safety events per 1,000,000 (1 million) work hours (production and drilling work hours only). Source: OGP Report No. 456, Process Safety – Recommended Practice on Key Performance Indicators, International Association of Oil & Gas Producers, November 2011. Global StandardsPSHA
Definition(s)
PSHA
Probabilistic seismic hazard analysis. Source:API RP 2EQ, Seismic Design Procedures and Criteria for Offshore Structures, First Edition, November 2014. Global StandardsPSHA
Framework permitting the identification, quantification, and rational combination of uncertainties in earthquakes' intensity, location, rate of recurrence, and variations in ground motion characteristics. Source:API RP 2EQ, Seismic Design Procedures and Criteria for Offshore Structures, First Edition, November 2014. Global StandardsPSI
Definition(s)
PSI
Pounds per square inch. Source: API RP 59, Recommended Practice for Well Control Operations, Second Edition, May 2006. Global Standards Source: API RP 64, Recommended Practice for Diverter Systems Equipment and Operations, Second Edition, November 2001 (March 1, 2007). Global Standards Source: API STD 65 – Part 2, Isolating Potential Flow Zones During Well Construction, Upstream Segment, Second Edition, December 2010. Global Standards Source: Deepwater Well Control Guidelines. IADC GuidelinesPSI
"Psi" means pounds per square inch. Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. RegulationsPSI
“Psi” means pounds per square inch. Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. RegulationsPSIA
Definition(s)
PSIA
"Psia" means pounds per square inch absolute. Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. RegulationsPSIA
Pounds per square in. absolute. Source: API RP 64, Recommended Practice for Diverter Systems Equipment and Operations, Second Edition, November 2001 (March 1, 2007). Global StandardsPSIG
Definition(s)
PSIG
"Psig" means pounds per square inch gauge. Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. RegulationsPSIG
Pounds per square in. gauge. Source: API RP 64, Recommended Practice for Diverter Systems Equipment and Operations, Second Edition, November 2001 (March 1, 2007). Global StandardsPSIIP
Definition(s)
PSIIP
Project specific in-service inspection programme. Source: ISO 19905-1:202, Petroleum and natural gas industries – Site-specific assessment of mobile offshore units – Part 1: Jack-ups. Global StandardsPSL
Definition(s)
PSL
Categories of design requirements based on the application.
Source: API Standard 2CCU, Offshore Cargo Carrying Units, First Edition, August 2017. Global Standards