Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
Joystick System
Definition(s)
Joystick System
A system with centralized manual position control and manual or automatic heading control.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceJoystick System
Joystick system means a system with centralized manual position control and manual or automatic heading control.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceJIP
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 StandardsJumper Line (hose)
Definition(s)
Jumper Line (hose)
Flexible section of choke, kill, or auxiliary line that provides for continuous flow around a flex/ball joint while accommodating the angular motion at the flex/ball joint.
Source: API Specification 16Q, Design, Selection, Operation, and Maintenance of Marine Drilling Riser Systems, Second Edition, April 2017. Global StandardsJoint Probability
Definition(s)
Joint Probability
Joint probability is the probability of two events occurring in conjunction -that is, the probability that event A and event B both occur, written as ) or P(AB) and pronounced A intersect B. The probability of someone dying from the pandemic flu is equal to the joint probability of someone contracting the flu (event A) and the flu killing them (event B). Joint probabilities are regularly used in Probabilistic Risk Assessments and Event Trees. Sample Usage: The probability of developing a fever from influenza is equal to the joint probability of someone contracting influenza and developing a fever. Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory GuidanceJob
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 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 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 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 StandardsJet-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 StandardsJack-house
Definition(s)
Jack-house
The structure surrounding the leg chord into which multiple jacking units are installed. Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 5, Main and Auxiliary Machinery, June 2013, Lloyd’s Register, 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 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 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 StandardsJunction Box (J-Box) (Hydraulic or Pneumatic)
Definition(s)
Junction Box (J-Box) (Hydraulic or Pneumatic)
A bolt-on plate having multiple stab-type terminal fittings used for quick connection of the multi-hose bundle to a pod, hose reel or manifold. 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 StandardsJunction Box (J-Box) (Electrical)
Definition(s)
Junction Box (J-Box) (Electrical)
An enclosure used to house the termination points of electrical cables and components that may also contain electrical components required for system operation. 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 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 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 Standards