Well Control (Choke) Manifold

Well Control (Choke) Manifold

Definition(s)

Well Control (Choke) Manifold

Part of a specially-designed section of piping installed on a drilling rig for use during well control incidents and not for MPD. This manifold and any associated choke(s) are designed for lower flow rates and higher pressures than those used for drilling.

Source: ABS Guide for Classification and Certification of Managed Pressure Drilling Systems, September 2017. Global Standards
Winding Angle

Winding Angle

Definition(s)

Winding Angle

Shock load or high-pressure surge caused by sudden halting of flow in a pipeline or piping system. 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 Standards
WR

WR

Definition(s)

WR

Woven Roving. 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 Standards  

WR

Cloth reinforcement structure in which fibre bundle tows are woven together in a single plane to provide reinforcement which is usually orientated to provide strength in the orthogonal 0° and 90° directions. 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 Standards
Woven Roving

Woven Roving

Definition(s)

Woven Roving

Cloth reinforcement structure in which fibre bundle tows are woven together in a single plane to provide reinforcement which is usually orientated to provide strength in the orthogonal 0° and 90° directions. 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 Standards
Well Slot

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.
Source: ISO 18647:2017, Petroleum and natural gas industries — Modular drilling rigs for offshore fixed platforms, First Edition, August 2017. Global Standards
Well Logging Module

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 Standards
WCF

WCF

Definition(s)

WCF

Worst-Case Failure. Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance  

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 Guidance
WCFDI

WCFDI

Definition(s)

WCFDI

Worst-Case Failure Design Intent (WCFDI) means the specified minimum DP system capabilities to be maintained following the worst-case failure. The worst-case failure design intent is used as the basis of the design. This usually relates to the number of thrusters and generators that can simultaneously fail.

Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance
Worst-Case Failure Design Intent (WCFDI)

Worst-Case Failure Design Intent (WCFDI)

Definition(s)

Worst-Case Failure Design Intent (WCFDI)

The specified minimum DP system capabilities to be maintained following the worst-case failure. The worst-case failure design intent is used as the basis of the design. This usually relates to the number of thrusters and generators that can simultaneously fail.

Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance  

Worst-Case Failure Design Intent (WCFDI)

Worst-Case Failure Design Intent (WCFDI) means the specified minimum DP system capabilities to be maintained following the worst-case failure. The worst-case failure design intent is used as the basis of the design. This usually relates to the number of thrusters and generators that can simultaneously fail.

Source: IMO MSC.1/Circ.1580, GUIDELINES FOR VESSELS AND UNITS WITH DYNAMIC POSITIONING (DP) SYSTEMS, 16 June 2017, International Maritime Organization. Regulatory Guidance
Well Integrity Incident

Well Integrity Incident

Definition(s)

Well Integrity Incident

A well integrity incident is defined as a failure of barrier(s) or failure to activate barrier(s), resulting in an unintentional flow, leak or release of fluids to the environment or other formations.

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
Well Control Incident

Well Control Incident

Definition(s)

Well Control Incident

A well control incident is in drilling & completion and live well intervention defined as a failure of barrier(s) or failure to activate barrier(s), resulting in an unintentional1 flow of formation fluid –
  1. into the well
  2. into another formation or
  3. to the external environment.
  1. A planned flow is not a well control incident (for instance DST, mini DST etc.).
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
Worst-Case Failure (WCF)

Worst-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 Standards  

Worst-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 Guidance  

Worst-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 Guidance
Weight of One fully Kitted Person (including luggage/ tools)

Weight 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 Standards
WLAN

WLAN

Definition(s)

WLAN

Wireless local area network.

Source:  DNVGL-RP-G108, Cyber security in the oil and gas industry based on IEC 62443, DNV GL, September 2017. Global Standards

WPA

WPA

Definition(s)

WPA

Wi-Fi protected access. Source:  DNVGL-RP-G108, Cyber security in the oil and gas industry based on IEC 62443, DNV GL, September 2017. Global Standards
WSUS

WSUS

Definition(s)

WSUS

Windows server update services. Source:  DNVGL-RP-G108, Cyber security in the oil and gas industry based on IEC 62443, DNV GL, September 2017. Global Standards
WAN

WAN

Definition(s)

WAN

Wide Area Network. Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Wiretapping

Wiretapping

Definition(s)

Wiretapping

Attack that intercepts and accesses data and other information contained in a flow in a communication system [11].
  • NOTE: Although the term originally referred to making a mechanical connection to an electrical conductor that links two nodes, it is now used to refer to reading information from any sort of medium used for a link or even directly from a node, such as a gateway or subnetwork switch.
  • NOTE: "Active wiretapping" attempts to alter the data or otherwise affect the flow; "passive wiretapping" only attempts to observe the flow and gain knowledge of information it contains
Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
Wide Area Network

Wide Area Network

Definition(s)

Wide Area Network

Communications network designed to connect computers, networks and other devices over a large distance, such as across the country or world [12]. Source: ANSI/ISA–99.00.01–2007, Security for Industrial Automation and Control Systems, Part 1: Terminology, Concepts, and Models, 29 October 2007. National Standard
WLLmin

WLLmin

Definition(s)

WLLmin

Minimum working load limit. Source: API Standard 2CCU, Offshore Cargo Carrying Units, First Edition, August 2017. Global Standards
Weldment

Weldment

Definition(s)

Weldment

Portion or area of a component on which welding has been performed.
  • NOTE: A weldment includes the weld metal, the heat-affected zone (HAZ), and the base metal unaffected by the heat of welding.
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
WIMS

WIMS

Definition(s)

WIMS

Well integrity management system. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Well Stock

Well Stock

Definition(s)

Well Stock

Portfolio of wells for which the well operator has operating or well integrity assurance responsibility. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Well Status

Well Status

Definition(s)

Well Status

Well’s current operational function.
  • Note: 1 to entry: Functions include undergoing construction, in operation (i.e. producing, injecting, shut-in), undergoing intervention, suspended, or abandoned.
Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Well Operating Limits

Well Operating Limits

Definition(s)

Well Operating Limits

Combination of parameters established by the well operator within which the well should be operated to ensure that all component specifications, including their applicable design or safety factors and performance standards, are not violated throughout the well life cycle. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards  

Well Operating Limits

The well operating limits are defined as the combination of parameters within which the well should be operated to ensure that all component specifications, including their applicable design or safety factors and performance standards, are not violated. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Well Integrity Management

Well Integrity Management

Definition(s)

Well Integrity Management

Application of technical, operational and organizational methods to prevent the uncontrolled flow of fluids at the surface or across subsurface formations throughout the life cycle of the well. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Well Handover

Well Handover

Definition(s)

Well Handover

Act or process that formalises the transfer of a well, and operating responsibility, from one competent party to another, including the requisite data and documents. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Well Barrier Plan

Well Barrier Plan

Definition(s)

Well Barrier Plan

Well operator’s specific programme for barrier placement and verification in a well to prevent unplanned flow during each stage of well construction, operation, abandonment or decommissioning. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Well Abandonment

Well Abandonment

Definition(s)

Well Abandonment

Permanent subsurface isolation to prevent any undesired communication between any distinct zones and fluid movement out of a well using validated well barriers. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
Water Seal

Water Seal

Definition(s)

Water Seal

Device that directs the flow of relief gases through a liquid (normally water) on the path to the flare burner, used to protect the flare header from air infiltration or flashback, to divert flow, or to create backpressure for the flare header.

Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards