Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
QRA
Definition(s)
QRA
Quantitative Risk Analysis. Source: ISO 17776:2016, Petroleum and natural gas industries — Offshore production installations — Major accident hazard management during the design of new installations, Second Edition, December 2016. Global Standards Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards Source: 117 OLF, Norwegian Oil and Gas Association recommended guidelines for Well Integrity, No. 117, Revision No. 4, June 2011. Global Standards Source: API RP 17A, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, Fourth Edition, Reaffirmed 2011. Global Standards Source: NOPSEMA Guidance Note: ALARP, N-04300-GN0166, Australia, Revision 4, December 2012. Regulatory Guidance Source: NOPSEMA Guidance note: Risk Assessment, N-04300-GN0165, Australia, Revision 4, December 2012. Regulatory Guidance Source: Verification of Lifting Appliances for the Oil and Gas Industry, DNV-OSS-308, October 2010, Det Norske Veritas AS, Global StandardsQRA
Quantitative Risk Assessment. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards 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 GuidelinesQuantitative Risk Assessment (QRA)
The evaluation of the extent of risk arising, with incorporation of calculations based upon the frequency and magnitude of hazardous events. 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 GuidelinesQSP
Definition(s)
QSP
Quality survey plan. Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global StandardsQT
Definition(s)
QT
Quenched and tempered. Source: API SPEC 5CRA, Specification for Corrosion Resistant Alloy Seamless Tubes for Use as Casing, Tubing and Coupling Stock, Upstream Segment, First Edition, February 2010 (Errata August 2011). Global StandardsQTC
Definition(s)
QTC
Qualification test coupon. 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 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 Standards Source: API SPEC 17D, Design and Operation of Subsea Production Systems—Subsea Wellhead and Tree Equipment, Upstream Segment, Second Edition May 2011 (Errata September 2011). Global StandardsQualification
Definition(s)
Qualification
Process of demonstrating that a component is in accordance with the requirements of ISO 14692-2. Source: ISO 14692-1:2017, Petroleum and natural gas industries — Glass-reinforced plastics (GRP) piping — Part 1: Vocabulary, symbols, applications and materials, Second Edition, August 2017. Global StandardsQualification
Demonstrated education, training and work experience, where applicable [SOURCE: ISO/IEC 17024:2012, 3.7]. Source: ISO/IEC TS 17027:2014, Conformity assessment – Vocabulary related to competence of persons used for certification of persons, Global StandardsQualification Test
Definition(s)
Qualification Test
A one-time (prototype) test program performed on a newly designed or significantly redesigned control system or component to validate conformance with design specifications. Source: API SPEC 16D, Specification for Control Systems for Drilling Well Control Equipment and Control Systems for Diverter Equipment, Upstream Segment, Second Edition, July 2004. Global StandardsQualified
Definition(s)
Qualified
A person who, by possession of a recognized degree, certificate of professional standing, or who by extensive knowledge, training, and experience, has successfully demonstrated the ability to solve or resolve problems relating to the subject matter and work. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global StandardsQualified
Qualified:- in relation to a medical practitioner — means qualified or entitled, under a law of a State or Territory, to practise as a medical practitioner; and
- in relation to a nurse — means qualified or entitled, under a law of a State or Territory, to practise as a nurse; and
- in relation to a pharmacist — means qualified or entitled, under a law of a State or Territory, to practise as a pharmacist.
Qualified
"Qualified" means one who by possession of a recognized degree, certificate, or professional standing, or who by extensive knowledge, training and experience has successfully demonstrated ability to solve or resolve problems relating to the subject matter, the work, or the project. Source: State of Wyoming Occupational Safety and Health Rules and Regulations for Oil and Gas Well Drilling, Revised January 8, 2013. RegulationsQualified Crane Inspector
Definition(s)
Qualified Crane Inspector
A person who conducts the necessary inspection of cranes based on usage, condition, and performance to ensure conformance with manufacturer’s specifications, regulatory requirements (as applicable), any other pertinent criteria, and the provisions of this RP. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global StandardsQualified Crane Operator
Definition(s)
Qualified Crane Operator
A person who performs the act or process of raising or lowering a load using a mechanical or nonmechanical crane. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global StandardsQualified Crane Operator
A person so designated by the employer who has appropriate offshore experience and training. Such appropriate experience and training must comprise minimum amounts of classroom-type sessions and hands-on field training, on cranes specific to the type of crane to be operated by the qualifying Crane Operator. These minimum requirements are outlined in detail in 3.1.2 and Appendix A1, Crane Operator Training. This RP should be followed to qualify Crane Operators of two crane types: 1) operation of non-mechanical cranes and/or 2) operation of mechanical cranes (those with freefall capability). With this minimum training, qualifying Crane Operators should be qualified to safely operate the crane(s) on which they have been trained. Also, with this minimum training, the qualifying Crane Operator should also be sufficiently qualified to perform the crane inspections outlined in 4.1.2, with the exception of the Initial, Quarterly, and Annual Inspections. Crane Operators will remain qualified to operate the cranes on which they have been trained, provided they successfully complete the refresher training requirements outlined in 3.1.2d. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global StandardsQualified Inspector
Definition(s)
Qualified Inspector
A person so designated by the employer who by reason of appropriate experience and training, has successfully completed classroom-type training on crane maintenance and troubleshooting; on hoist troubleshooting and overhaul; and on the structural aspects of offshore cranes, which gives a knowledge of structurally critical components and critical inspection areas. These minimum training requirements are outlined in Appendix A2. Additionally, individuals recognized by regulatory authorities (“Authorized Surveyors” or “certifying authorities”) may conduct inspections of cranes pursuant to this edition, provided they meet the requirements of Appendix A2. With successful completion of this minimum training supplemented with requalification at a minimum of every four (4) years, the inspector is considered qualified to perform the Initial, Pre-use, Monthly, Quarterly, and Annual Inspections. The scope of these inspections is outlined in 4.1.2. It is not a requirement for a Qualified Inspector to also be a Qualified Crane Operator. However, a Qualified Inspector is not a Qualified Crane Operator unless they have also completed the requirements of a Qualified Crane Operator (see 3.1.2), including the physical outlined in 3.1.2b and Appendix A1. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global StandardsQualified Inspector
An inspector as defined in the Unfired Pressure Safety Orders, and who holds a valid certificate of competency issued by the Division. Source: Petroleum Safety Orders--Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. RegulationsQualified Instructor
Definition(s)
Qualified Instructor
in respect of a specified course, a person who, because of his knowledge, training and experience, is qualified to provide instruction that is consistent with the objectives of the course. Source: Atlantic Canada Offshore Petroleum Industry, Standard Practice for the Training and Qualifications of Personnel, 2013, Canadian Association of Petroleum Producers, Global StandardsQualified Person
Definition(s)
Qualified Person
An individual or individuals with competencies gained through training and experience as measured against established requirements, such as standards or tests that enable the individual to perform a required function.
Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global StandardsQualified Person
A person designated by the employer who, by possession of a recognized degree, certificate, or professional standing, or by extensive knowledge, training and experience, has successfully demonstrated ability to identify and solve or resolve problems relating to the subject matter, the work, or the project and, when required, is properly licensed in accordance with federal, state, or local laws and regulations. API RP 2201, Safe Hot Tapping Practices in the Petroleum & Petrochemical Industries, Fifth Edition, July 2003 (Reaffirmed October 2010), Global Standards Source:API RP 2009 (2002) Safe welding, cutting and hot work practices in the petroleum and petrochemical industries. Global StandardQualified Person
in respect of a specified duty, a person who, because of his knowledge, training and experience, is qualified to perform that duty safely and properly. Source: Atlantic Canada Offshore Petroleum Industry, Standard Practice for the Training and Qualifications of Personnel, 2013, Canadian Association of Petroleum Producers, Global StandardsQualified Person
A person who, by possession of a recognized degree, certificate, or professional standing, or who by knowledge, training, or experience, has successfully demonstrated the ability to solve or resolve problems relating to the subject matter or the work. Source: API Standard 2CCU, Offshore Cargo Carrying Units, First Edition, August 2017. Global Standards Source: API RP 54, Recommended Practice for Occupational Safety for Oil and Gas Well Drilling and Servicing Operations, Third Edition, August 1999 (2007). Global Standards Source: API RP 74, Recommended Practice for Occupational Safety for Onshore Oil and Gas Production Operation, First Edition, October 2001 (March 2007). Global StandardsQualified
A person who, by possession of a recognized degree, certificate of professional standing, or who by extensive knowledge, training, and experience, has successfully demonstrated the ability to solve or resolve problems relating to the subject matter and work. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global StandardsQualified Person
“Qualified person” means, in respect of a specified duty, a person who, because of his knowledge, training and experience, is qualified to perform that duty safely and properly (personne qualifiée). Source: Canada Oil and Gas Occupational Safety and Health Regulations, SOR/87-612, February 2013. Regulations Source: Oil and Gas Occupational Safety and Health Regulations, SOR/87-612, Canada, current to April 29, 2013. RegulationsQualified Person
A person designated by the employer who by reason of training and experience has demonstrated the ability to safely perform his duties and, where required, is licensed in accordance with federal, state, or local laws and regulations. Source: Petroleum Safety Orders--Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. RegulationsQualified Person
Individual with characteristics or abilities gained through training or experience, or both, as measured against established requirements, such as standards or tests that enable the individual to perform a required function effectively. Source: API SPEC 11D1, Packers and Bridge Plugs, Upstream Segment, Second Edition, July 2009. Global StandardsQualified Person
“Qualified person” means a person who is- qualified because of the person’s knowledge, training and experience to do the assigned work in a manner that will ensure the health and safety of every person in the workplace, and
- knowledgeable about the provisions of the Accord Acts and Requirements that apply to the assigned work, and about hazards associated with the assigned work.
Qualified Person
“Qualified person” means, in respect of a specified duty, a person who, because of his knowledge, training and experience, is qualified to perform that duty safely and properly. Source: Nova Scotia Offshore Petroleum Occupational Health & Safety Requirements, Canada-Nova Scotia Offshore Petroleum Board, Canada, December 2000. RegulationsQualified Person
person trained or experienced with knowledge required for performing duties related to a specific task. Source: Rules for Classification and Construction, IV Industrial Services, 6 Offshore Technology, 9 Guideline for Personnel Transfers by Means of Lifting Appliances, Edition 2011, Germanischer Lloyd SE, Global StandardsQualified Personnel
Definition(s)
Qualified Personnel
Individuals with characteristics or abilities gained through theory and training and/or experience as measured against the manufacturer’s established requirements. Source: API RP 17G, Recommended Practice for Completion/Workover Risers, Second Edition, July 2006 (Reaffirmed April 2011). Global StandardsQualified Personnel
Individual with characteristics or abilities gained through training, experience, or both, as measured against the established requirements of the manufacturer/purchaser/this International Standard. Source: API SPEC 6A, Specification for Wellhead and Christmas Tree Equipment, Twentieth Edition, October 2010 (Addendum November 2012). Global StandardsQualified Personnel
Individual with characteristics or abilities gained through training, experience or both, as measured against the manufacturer's established requirements. Source: API SPEC 16A, Specification for Drill-through Equipment, Third Edition, June 2004 (Errata/Supplement November 2004). Global StandardsQualified Personnel
Individuals with characteristics or abilities gained through training, experience, or both, as measured against the manufacturer/user/API established requirements. Source: API SPEC 16C, Specification for Choke and Kill Systems, First Edition, January 1993 (Reaffirmed 2001). Global StandardsQualified Rigger
Definition(s)
Qualified Rigger
Anyone who attaches or detaches loads or loose gear to lifting devices. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global StandardsQualified Rigger
A rigger is anyone who attaches or detaches lifting equipment to loads or lifting devices. In order to be considered a Qualified Rigger, the person shall have successfully completed a rigger-training program in accordance with Appendix A3. The minimum requirements for a Qualified Rigger are outlined in detail in 3.1.4 and Appendix A3. A Qualified Crane Operator is also a Qualified Rigger. Riggers will remain qualified provided they successfully complete the refresher training requirements outlined in 3.1.4. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global StandardsQuality
Definition(s)
Quality
Conformance to specified requirements. Source: API SPEC 17J, Specification for Unbonded Flexible Pipe, Third Edition, July 2008. Global StandardsQuality
A relative judgement on whether the features and characteristics of something- such as a product, service, asset, activity or project- meet stated needs or requirements. Source: IOGP Report No. 510, Operating Management System Framework for controlling risk and delivering high performance in the oil and gas industry, International Association of Oil & Gas Producers, June 2014. Global StandardsQuality Assurance
Definition(s)
Quality Assurance
All planned, systematic, and preventative actions required to determine if materials, equipment, or services will meet specified requirements so that the piping will perform satisfactorily in-service. Quality assurance plans will specify the necessary quality control activities and examinations.- NOTE: The contents of a quality assurance inspection management system for piping systems are outlined in 4.3.1.
Quality Assurance
All planned, systematic, and preventative actions specified to determine if materials, equipment, or services will meet specified requirements so that equipment will perform satisfactorily in service. The minimum contents of a QA inspection manual for in-service inspection are outlined in 4.1.2.
Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global StandardsQuality Assurance
All planned, systematic, and preventative actions required to determine if materials, equipment, or services will meet specified requirements so that equipment will perform satisfactorily in service. The contents of a quality assurance inspection manual are outlined in 4.2.1. Source: API 510, Pressure Vessel Inspection Code: In-Service Inspection, Rating, Repair, and Alteration Downstream Segment, Ninth Edition, June 2006. Global StandardsQuality assurance
Planned, systematic, and preventive actions that are required to ensure that materials, products, or services meet specified requirements. Source: API SPEC 17J, Specification for Unbonded Flexible Pipe, Third Edition, July 2008. Global StandardsQuality assurance
All activities and functions concerned with the attainment of quality including documentary evidence to confirm that such attainment is met. Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 4, Steel Unit Structures, June 2013, Lloyd’s Register, Global StandardsQuality Assurance Manual
Definition(s)
Quality Assurance Manual
A document which completely describes the manufacturer's quality control and assurance program. Source: API RP 2SM Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, Second Edition, July 2014. Global Standards Source: API RP 2SM, Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, First Edition, July 2014. Global StandardsQuality Assurance Supervisor
Definition(s)
Quality Assurance Supervisor
An employee of the manufacturer who is responsible for ensuring the manufacturer adheres to quality assurance procedures. Source: API RP 2SM Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, Second Edition, July 2014. Global Standards Source: API RP 2SM, Design, Manufacture, Installation, and Maintenance of Synthetic Fiber Ropes for Offshore Mooring, First Edition, July 2014. Global StandardsQuality Audit
Definition(s)
Quality Audit
A systematic and independent examination to determine whether established work processes and quality systems are adhered to quality system signifies both the quality management system and established production and control procedures Source: Rules for Classification – Offshore units, DNVGL-OU-0101, Offshore drilling and support units, DNV GL, July 2015. Global StandardsQuality Control
Definition(s)
Quality Control
Those physical activities that are conducted to check conformance with specifications in accordance with the quality assurance plan (e.g. NDE techniques, hold point inspections, material verifications, checking certification documents, etc.). 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 StandardsQuality Control
Those physical activities that are conducted to check conformance with specifications in accordance with the QA plan.
Source: API 510, Pressure Vessel Inspection Code: In-service Inspection, Rating, Repair, and Alteration, Tenth Edition, May 2014, with Addendum May 2017. Global Standards