Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
Jack-Up
Definition(s)
Jack-Up
Mobile offshore unit with a buoyant hull and one or more legs that can be moved up and down relative to the hull. NOTE A jack-up reaches its operational mode by lowering the leg(s) to the seabed and then raising the hull to the required elevation. The majority of jack-ups have three or more legs, each of which can be moved independently and which are supported in the seabed by spudcans. Source: ISO 19905-1:202, Petroleum and natural gas industries – Site-specific assessment of mobile offshore units – Part 1: Jack-ups. Global Standards Source: ISO 19900:2013, Petroleum and natural gas industries – General requirements for offshore structures. Global StandardsJack-Up Owner
Definition(s)
Jack-Up Owner
Representative of the companies owning or chartering the jack-up. Source: ISO 19905-1:202, Petroleum and natural gas industries – Site-specific assessment of mobile offshore units – Part 1: Jack-ups. Global StandardsJack-up Unit
Definition(s)
Jack-up Unit
A self-elevating (or jack-up) unit is a floating unit which is designed to operate as a sea bed-stabilised unit in an elevated mode. These units have a buoyant hull (generally either triangular or pontoon shaped) with movable legs capable of raising its hull above the surface of the sea. The legs may be designed to penetrate the sea bed, or be attached to a mat or individual footings which rest on the sea bed. These unit types are generally not fitted with a propulsion system. Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 3, Functional Unit Types and Special Features, June 2013, Lloyd’s Register, Global StandardsJacket
Definition(s)
Jacket
A braided or plastic covering which is placed over the rope (or over individual strands) for protection and to hold the rope structure together. 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 StandardsJacking Gear Unit
Definition(s)
Jacking Gear Unit
The individual reduction gear assembly, comprising drive motor, coupling, enclosed reduction gearing and main pinion normally attached to the jack-house. Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 5, Main and Auxiliary Machinery, June 2013, Lloyd’s Register, Global StandardsJail
Definition(s)
Jail
JAIL shall mean those structures where the personal liberties of occupants are restrained, including but not limited to, mental hospitals, mental sanitariums, prisons, reformatories. Source: Oil and Gas Conservation Commission, Practice and Procedure, Code of Colorado Regulations, 2 CCR 404-1, February 2013. RegulationsJar
Definition(s)
Jar
Mechanical or hydraulic device used in the drill stem to deliver an impact load to another component of the drill stem, especially when that component is stuck. Source: API RP 7G-2, Recommended Practice for Inspection and Classification of Used Drill Stem Elements, First Edition, August 2009. Global StandardsJar
A tool used to deliver an axial impact load to the downhole string.
Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global StandardsJet Fire
Definition(s)
Jet Fire
Turbulent diffusion flame resulting from the combustion of a fuel continuously released with significant momentum in a particular direction. 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 StandardsJet Fire (JF)
Turbulent diffusion flame resulting from the combustion of a fuel continuously released with momentum in a particular direction. Source: ISO 13702:2015, Petroleum and natural gas industries — Control and mitigation of fires and explosions on offshore production installations — Requirements and guidelines, Second Edition, August 2015. Global StandardsJet Fire
Fire created when a leak from a pressurized system ignites and forms a burning jet.
Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global StandardsJet Fire
Fire created when a leak from a pressurized system ignites and forms a burning jet.- NOTE: A jet fire can impinge on other equipment, causing damage.
Jet-fire Test
Definition(s)
Jet-fire Test
A jet-fire test is used to determine how effective the passive fire protection materials are in withstanding an actual jet fire. The test is not intended to replace the hydrocarbon fire test. Some Administrations require fire protection materials to be assessed by this method and, where requested, LR can advise on the detailed requirements. Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 7, Safety Systems, Hazardous Areas and Fire, June 2013, Lloyd’s Register, Global StandardsJetting the Well in
Definition(s)
Jetting the Well in
Circulating a lower – density fluid to allow the well to go underbalance, either to drill in underbalance mode or to induce production from the formation. Source: IADC UBO / MPD Glossary, December 2011. Global StandardsJF (jet fire)
Definition(s)
JF
Jet Fire. Source: ISO 13702:2015, Petroleum and natural gas industries — Control and mitigation of fires and explosions on offshore production installations — Requirements and guidelines, Second Edition, August 2015. Global StandardsJF (jet fire)
Turbulent diffusion flame resulting from the combustion of a fuel continuously released with momentum in a particular direction. Source: ISO 13702:2015, Petroleum and natural gas industries — Control and mitigation of fires and explosions on offshore production installations — Requirements and guidelines, Second Edition, August 2015. Global StandardsJHA
Definition(s)
JHA
Safety management technique that is used to anticipate and identify hazards in order to make decisions to appropriately control the hazards associated with a process, job, or procedure. NOTE Any job that has actual or potential hazards is a candidate for a JHA. Source: API RP 98, Personal Protective Equipment Selection for Oil Spill Responders, First Edition, August 2013. Global StandardsJHA
Job Hazard 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 RP 98, Personal Protective Equipment Selection for Oil Spill Responders, First Edition, August 2013. Global Standards Source: NOPSEMA Guidance note: Risk Assessment, N-04300-GN0165, Australia, Revision 4, December 2012. Regulatory Guidance Source: NOPSEMA Guidance Note: Noise Management—Principles of Assessment and Control, N-09000-GN0401, Australia, Revision 3, December 2011. Regulatory Guidance 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 GuidelinesJHA/JSA
Definition(s)
JHA/JSA
Job Hazard Analysis / Job Safety Analysis. Source: NOPSEMA Guidance Note: Safety Management Systems, N04300-GN1052, Australia, Revision 0, December 2012. Regulatory GuidanceJib
Definition(s)
Jib (also known as Tip Extension)
An extension attached to the boom point to provide added boom length for lifting specified loads. Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Sixth Edition, May 2007. Global Standards Source: API RP 2D, Operation and Maintenance of Offshore Cranes, Seventh Edition, December 2014. Global StandardsJIP
Definition(s)
JIP
Joint industry project. Source: DNVGL-RP-G108, Cyber security in the oil and gas industry based on IEC 62443, DNV GL, September 2017. Global StandardsJob
Definition(s)
Job
One deployment of downhole tools to planned depth and retrieval through the rotary table.
Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global StandardsJob
An operating activity or any distinct task within it. 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 StandardsJob
Organization and sequence in time and space of an individual’s work tasks (2.17) or the combination of all human performance by one worker (2.4) within a work system (2.2). ISO 6385:2016(E) Source: ISO 6385:2016, Ergonomics principles in the design of work systems, Third Edition, September 2016. Global StandardsJob Analysis
Definition(s)
Job Analysis
method(s) used to identify the tasks and the associated competence Note 1 to entry: Methods generally involve analysis of the associated tasks, knowledge, skills or abilities that constitute competence as required by the scope of work. Note 2 to entry: Job analysis provides the basis for the validity of any assessments used in issuing credentials. Note 3 to entry: Other terms for job analysis are job-task analysis, practice analysis, performance analysis and role-delineation study. Source: ISO/IEC TS 17027:2014, Conformity assessment – Vocabulary related to competence of persons used for certification of persons, Global StandardsJob Hazard Analysis
Definition(s)
Job Hazard Analysis
Safety management technique that is used to anticipate and identify hazards in order to make decisions to appropriately control the hazards associated with a process, job, or procedure. NOTE Any job that has actual or potential hazards is a candidate for a JHA. Source: API RP 98, Personal Protective Equipment Selection for Oil Spill Responders, First Edition, August 2013. Global StandardsJob Lot
Definition(s)
Job Lot
Batch of material or components that have undergone the same process or series of processes; this may include more than one heat of metallic components.
Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global StandardsJob Lot
Batch of material or components that have undergone the same process or series of processes. Source: API SPEC 11D1, Packers and Bridge Plugs, Upstream Segment, Second Edition, July 2009. Global StandardsJob Safety Analysis (JSA)
Definition(s)
Job Safety Analysis
Job hazard analysis (JHA) accompanied by a risk assessment (RA), used to identify controls such as PPE requirements: JHA + RA = JSA Source: API RP 98, Personal Protective Equipment Selection for Oil Spill Responders, First Edition, August 2013. Global StandardsJob Safety Analysis (JSA)
A method that can be used to identify, analyze and record: (1) the steps involved in performing a specific job; (2) the existing or potential safety and health hazards associated with each step; and (3) the recommended action(s)/procedure(s) that will eliminate or reduce these hazards and the risk of an injury or illness. (Used interchangeably with the terms “Job Hazard Analysis”, but also refer to “Task Risk Analysis” for the purposes of this guideline.) 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 GuidelinesJob Transfer Case
Definition(s)
Job transfer case
A work-related injury/illness that, based on the recommendations of a physician or other licensed health care professional, the injured party is moved to a different job position or assignment. Source: API RP 75, Recommended Practice for Development of a Safety and Environmental Management Program for Offshore Operations and Facilities: Upstream Segment, Third Edition, May 2004. 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 StandardsJob-Lot Traceable 〈Parts〉
Definition(s)
Job-Lot Traceable 〈Parts〉
Identifiable as originating from a job lot that designates the included heat(s). Source: API SPEC 11D1, Packers and Bridge Plugs, Upstream Segment, Second Edition, July 2009. Global StandardsJoint
Definition(s)
Joint
Means of connecting two or more components- EXAMPLE: Plain pipe to a fitting, or plain pipe to plain pipe.