Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
Installer
Definition(s)
Installer
Party which carries out all or part of the construction and commissioning of composite piping installations and installation work for a project. 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 StandardsAuthority Having Jurisdiction
Definition(s)
Authority Having Jurisdiction
Third-party organization required to be satisfied with the standard of engineering proficiency and safety of a project- EXAMPLE: A classification society, verification body or government regulatory body.
Well Slot
Definition(s)
Well Slot
Opening provided for individual wells that allows a path from the underside of the drilling equipment set to the seabed- Note: 1 to entry: In general lateral supports are provided below each well slot from the platform structure through the topsides and through the water column to support the well tubular to withstand environmental forces and prevent excessive stress and displacements.
Well Logging Module
Definition(s)
Well Logging Module
Modularized facilities that include well logging winch, well logging room, wellhead lubricator and cable, used to provide well logging services. Source: ISO 18647:2017, Petroleum and natural gas industries — Modular drilling rigs for offshore fixed platforms, First Edition, August 2017. Global StandardsSkidding System
Definition(s)
Skidding System
Equipment that can include the skid rails, skid shoe, fwd/aft skidding claws, skidding cylinders, locking claws, skidding hydraulic power unit (HPU), locking and control unit, used for horizontal movement of the DES, covering the well slot area.- Note: 1 to entry: Alternative rig skidding systems can be used as well.
Skid Rail
Definition(s)
Skid Rail
Structural steelwork that provides smooth flat surfaces for the drilling equipment set to move in an X-Y planes to allow access over all well slots- Note: 1 to entry: The upper skid rail is the slide skid rail of the upper substructure of the drilling rig; the lower skid rail is that of the lower substructure.
Powder Tank Module
Definition(s)
Powder Tank Module
Modularized facilities that include bentonite tank, barite tank, cement tank, weighing equipment, control equipment, and manifold system, used to store powder materials for drilling fluid and cement slurry preparation. Source: ISO 18647:2017, Petroleum and natural gas industries — Modular drilling rigs for offshore fixed platforms, First Edition, August 2017. Global StandardsP-tank
Definition(s)
P-tank
Powder tank module. Source: ISO 18647:2017, Petroleum and natural gas industries — Modular drilling rigs for offshore fixed platforms, First Edition, August 2017. Global StandardsP-tank
Modularized facilities that include bentonite tank, barite tank, cement tank, weighing equipment, control equipment, and manifold system, used to store powder materials for drilling fluid and cement slurry preparation. Source: ISO 18647:2017, Petroleum and natural gas industries — Modular drilling rigs for offshore fixed platforms, First Edition, August 2017. Global StandardsMud Logging Module
Definition(s)
Mud Logging Module
Modularized facilities that include mud logging room, data acquisition system and display terminal, used to provide mud logging services. Source: ISO 18647:2017, Petroleum and natural gas industries — Modular drilling rigs for offshore fixed platforms, First Edition, August 2017. Global StandardsModular Drilling Rig
Definition(s)
Modular Drilling Rig
Modularized facilities for drilling from a fixed offshore platform consisting of drilling equipment set, drilling support, P-tank, cementing, well logging, mud logging and other equipment. Source: ISO 18647:2017, Petroleum and natural gas industries — Modular drilling rigs for offshore fixed platforms, First Edition, August 2017. Global StandardsMDR
Definition(s)
MDR
Modular Drilling Rig. Source: ISO 18647:2017, Petroleum and natural gas industries — Modular drilling rigs for offshore fixed platforms, First Edition, August 2017. Global StandardsMDR
Manufacturer's data reports. 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 StandardsMDR
Modularized facilities for drilling from a fixed offshore platform consisting of drilling equipment set, drilling support, P-tank, cementing, well logging, mud logging and other equipment. Source: ISO 18647:2017, Petroleum and natural gas industries — Modular drilling rigs for offshore fixed platforms, First Edition, August 2017. Global StandardsDrill Floor Clearance
Definition(s)
Drill Floor Clearance
Clear distance between the bottom of the rotary table support beam and the BOP deck of the platform. Source: ISO 18647:2017, Petroleum and natural gas industries — Modular drilling rigs for offshore fixed platforms, First Edition, August 2017. Global StandardsDrilling Equipment Set
Definition(s)
Drilling Equipment Set
Set of equipment that includes derrick/mast, substructure, drawworks, crown block, traveling block, hook, TDS, rotary table, BOP, driller’s cabin, drill floor equipment, choke and kill manifold and can also include shale shakers, degasser, desander, desilter, centrifuge, cuttings dryer, pipe handling system and BOP handling system etc., used to implement hoisting and rotating functions during drilling operations.- Note: 1 to entry: The drilling equipment set is generally movable by means of skid rails such that the centre can be positioned over one of a number of well slots.
Cementing Module
Definition(s)
Cementing Module
Modularized facilities that include cementing pump, mixing device and manifold system, used to provide cementing services. Source: ISO 18647:2017, Petroleum and natural gas industries — Modular drilling rigs for offshore fixed platforms, First Edition, August 2017. Global StandardsWorst-Case Failure (WCF)
Definition(s)
Worst Case Failure
Design intent refer to the minimum remaining capacity after any relevant single failure or common cause (for a given operational mode). Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global StandardsWorst-Case Failure (WCF)
The identified single fault in the DP system resulting in maximum detrimental effect on DP capability as determined through the FMEA.
Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceWorst-Case Failure (WCF)
Worst-Case Failure (WCF) means the identified single fault in the DP system resulting in maximum detrimental effect on DP capability as determined through the FMEA. Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory GuidanceWeight of One fully Kitted Person (including luggage/ tools)
Definition(s)
Weight of One fully Kitted Person (including luggage/ tools)
100 kg, to be used for establishing the live load (LL) of the gangway. Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global StandardsRedundancy Design Intent
Definition(s)
Redundancy Design Intent
High level description of systems and components distribution into redundant groups (e.g. narrative description of both the normal operation mode and the failed operation mode). Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global StandardsProduct Certificate (PC)
Definition(s)
Product Certificate (PC)
A compliance document validated and signed by the issuing organization: -identifying the product that the certificate applies to -confirming compliance with referred requirements. It is required that: -The tests and inspections have been performed on the certified product itself, or on samples taken from the certified product itself. -The tests were witnessed by a qualified representative of the organization issuing the certificate, or his authorized representative (see DNVGL-RU-SHIP Pt.1 Ch.3 Sec.5). Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global StandardsManned Personnel Transfer
Definition(s)
Manned Personnel Transfer
Engineered/marine personnel transferring operation (over a gangway) of short duration (usually less than 4 hours) covered by specific operational procedures personnel transfer procedure document describing in detail all phases of the personnel transferring operation.Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards
Landing and Transfer Coordinator
Definition(s)
Landing and Transfer Coordinator
Person in charge of the engineered personnel transferring operation, ensures that all aspects of the personnel transferring operation are according to the DNV GL approved personnel transfer procedure, shall possess a thorough knowledge and have experience with the actual operation live load (LL) for marking purposes, it shall represent allowable number of persons on the gangway at one moment.Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards
Inspection Certificate 3.2
Definition(s)
Inspection Certificate 3.2
A document prepared by both the manufacturer's authorized inspection representative, independent of the manufacturing department, and either the purchaser's authorized representative or the inspector designated by the official regulations and in which they declare that the products supplied are in compliance with the requirements of the order and in which tests results are supplied, see EN 10204 and ISO 10474.Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards
Inspection Certificate 3.1
Definition(s)
Inspection Certificate 3.1
A document issued by the manufacturer which contains the results of all the required tests It shall certify that the tests have been carried out by the manufacturer on samples taken from the delivered products direct, see EN 10204 and ISO 10474.
Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global StandardsGangway Axis
Definition(s)
Gangway Axis
- X axis: principal axis oriented along the length of the gangway.
- Y axis: secondary axis, perpendicular to X axis, oriented across the length of the gangway and in the floor/walkway plane.
- Z axis: secondary axis, perpendicular to the plane defined by X and Y axis.
Gangway (assembly)
Definition(s)
Gangway (assembly)
System intended to transfer personnel and cargo between 2 offshore vessels, typically including a bridge and a pedestal.
Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global StandardsFail-passive
Definition(s)
Fail-passive
A system that loses partly or completely its functionality (e.g. to actively motion compensate) in case of control system single failure The system can still be manually controlled.
Source: Offshore Gangways, DNVGL-ST-0358, DNV GL, September 2017. Global Standards