Area

Area

Definition(s)

Area

Subset of a site’s physical, geographic, or logical group of assets.
  • NOTE: An area may contain manufacturing lines, process cells, and production units. Areas may be connected to each other by a site local area network and may contain systems related to the operations performed in that area.
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

Area

'Area' means the sea-bed and ocean floor and subsoil thereof, beyond the limits of national jurisdiction Source: United Nations Convention on the Law of the Sea (UNCLOS), 1982, Legislation 
Dilution Method

Dilution Method

Definition(s)

Dilution Method

Dilution method – a process by which replacement ballast water is filled through the top of the ballast tank intended for the carriage of ballast water with simultaneous discharge from the bottom at the same flow rate and maintaining a constant level in the tank through out the ballast exchange operation. Source: Resolution MEPC.124(53), Guidelines for ballast water exchange (G6), 22 July 2005, International Maritime Organization. Regulatory Guidance Source: Resolution MEPC.149(55), Guidelines for ballast water exchange design and construction standards (G11), 13 October 2006, International Maritime Organization. Regulatory Guidance
Flow-through Method

Flow-through Method

Definition(s)

Flow-through Method

Flow-through method – a process by which replacement ballast water is pumped into a ballast tank intended for the carriage of ballast water, allowing water to flow through overflow or other arrangements. Source: Resolution MEPC.124(53), Guidelines for ballast water exchange (G6), 22 July 2005, International Maritime Organization. Regulatory Guidance Source: Resolution MEPC.149(55), Guidelines for ballast water exchange design and construction standards (G11), 13 October 2006, International Maritime Organization. Regulatory Guidance
Sequential Method

Sequential Method

Definition(s)

Sequential Method

Sequential method – a process by which a ballast tank intended for the carriage of ballast water is first emptied and then refilled with replacement ballast water to achieve at least a 95 per cent volumetric exchange. Source: Resolution MEPC.124(53), Guidelines for ballast water exchange (G6), 22 July 2005, International Maritime Organization. Regulatory Guidance Source: Resolution MEPC.149(55), Guidelines for ballast water exchange design and construction standards (G11), 13 October 2006, International Maritime Organization. Regulatory Guidance
Wye Spool

Wye Spool

Definition(s)

Wye Spool

Spool between the master and swab valves of a TFL tree, that allows the passage of TFL tools from the flowlines into the bores of the tree. 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 Standards
Wellhead Housing Pressure Boundary

Wellhead Housing Pressure Boundary

Definition(s)

Wellhead Housing Pressure Boundary

Wellhead housing from the top of the wellhead to where the lowermost seal assembly seals. 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 Standards
Valve Block

Valve Block

Definition(s)

Valve Block

Integral block containing two or more valves. 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 Standards  
Ballast Water Tank

Ballast Water Tank

Definition(s)

Ballast Water Tank

“Ballast Water Tank” – means any tank, hold, or space used for the carriage of ballast water. Source: Resolution MEPC.124(53), Guidelines for ballast water exchange (G6), 22 July 2005, International Maritime Organization. Regulatory Guidance Source: Resolution MEPC.127(53), Guidelines for ballast water management and development of ballast water management plans (G4), 22 July 2005, International Maritime Organization. Regulatory Guidance Source: Resolution MEPC.149(55), Guidelines for ballast water exchange design and construction standards (G11), 13 October 2006, International Maritime Organization. Regulatory Guidance  

Ballast Water Tank

“Ballast Water Tank” – means any tank, hold or space used for the carriage of ballast water as defined in Article 1 of the Convention. Source: Resolution MEPC.149(55), Guidelines for sediment reception facilities (G1), 13 October 2006, International Maritime Organization. Regulatory Guidance Source: Resolution MEPC.209(63), 2012 Guidelines on design and construction to facilitate sediment control on ships (G12), 2 March 2012, International Maritime Organization. Regulatory Guidance
Tree-Side Outlet

Tree-Side Outlet

Definition(s)

Tree-Side Outlet

Point where a bore exits at the side of the tree block. 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 Standards
Tree Guide Frame

Tree Guide Frame

Definition(s)

Tree Guide Frame

Structural framework that may be used for guidance, orientation and protection of the subsea tree on the subsea wellhead/tubing head, and that also provides support for tree flowlines and connection equipment, control pods, anodes and counterbalance weights. 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 Standards
Tree Connector

Tree Connector

Definition(s)

Tree Connector

Mechanism to join and seal a subsea tree to a subsea wellhead or tubing head. 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 Standards
Tree Cap

Tree Cap

Definition(s)

Tree Cap

Pressure-containing environmental barrier installed above production swab valve in a vertical tree or tubing hanger in a horizontal tree. 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 Standards
Tieback Adapter

Tieback Adapter

Definition(s)

Tieback Adapter

Device used to provide the interface between mudline suspension equipment and subsea completion equipment. 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 Standards
Surface BOP (SBOP)

Surface BOP (SBOP)

Definition(s)

Surface BOP

Blowout preventer designed for use on a surface facility such as a fixed platform, jackup or floating drilling on intervention unit. 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 Standards  
Subsea Wireline/Coiled Tubing BOP

Subsea Wireline/Coiled Tubing BOP

Definition(s)

Subsea Wireline/Coiled Tubing BOP

Subsea BOP that attaches to the top of a subsea tree to facilitate wireline or coiled tubing intervention. 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 Standards  
Subsea Wellhead Housing

Subsea Wellhead Housing

Definition(s)

Subsea Wellhead Housing

Pressure-containing housing that provides a means for suspending and sealing the well casing strings. 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 Standards  
Subsea Completion Equipment

Subsea Completion Equipment

Definition(s)

Subsea Completion Equipment

Specialized tree and wellhead equipment used to complete a well below the surface of a body of water. 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 Standards  
Antarctic Area

Antarctic Area

Definition(s)

Antarctic Area

Antarctic Area means the sea area south of latitude 60°S. <Annex II, Chapter 5, Regulation 8>. Source: Resolution MEPC.118(52), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Revised Annex II of MARPOL 73/78), 15 October 2004, International Maritime Organization. Legislation Source: Resolution MEPC.201(62), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Revised MARPOL Annex V), 15 July 2011, International Maritime Organization. Legislation
Subsea Casing Hanger

Subsea Casing Hanger

Definition(s)

Subsea Casing Hanger

Device that supports a casing string in the wellhead at the mudline. 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 Standards  
Low-Viscosity Substance

Low-Viscosity Substance

Definition(s)

Low-Viscosity Substance

Low-Viscosity Substance means a noxious liquid substance, which is not a High-Viscosity Substance.  <Annex II, Chapter 1, Regulation 1>. Source: Resolution MEPC.118(52), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Revised Annex II of MARPOL 73/78), 15 October 2004, International Maritime Organization. Legislation
Subsea BOP

Subsea BOP

Definition(s)

Subsea BOP

Blowout preventer designed for use on subsea wellheads, tubing heads or trees. 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 Standards  
High-Viscosity Substance

High-Viscosity Substance

Definition(s)

High-Viscosity Substance

High-Viscosity Substance means a noxious liquid substance in Category X or Y with a viscosity equal to or greater than 50 mPa.s at the unloading temperature.  <Annex II, Chapter 1, Regulation 1>. Source: Resolution MEPC.118(52), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Revised Annex II of MARPOL 73/78), 15 October 2004, International Maritime Organization. Legislation
NLS Tanker

NLS Tanker

Definition(s)

NLS Tanker

NLS tanker means a ship constructed or adapted to carry a cargo of Noxious Liquid Substances in bulk and includes an “oil tanker” as defined in Annex I of the present Convention when certified to carry a cargo or part cargo of Noxious Liquid Substances in bulk.  <Annex II, Chapter 1, Regulation 1>. Source: Resolution MEPC.118(52), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Revised Annex II of MARPOL 73/78), 15 October 2004, International Maritime Organization. Legislation
Reverse Differential Pressure

Reverse Differential Pressure

Definition(s)

Reverse Differential Pressure

Condition during which differential pressure is applied to a choke valve in a direction opposite to the specified operating direction. NOTE This can be in the operating or closed-choke position. 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 Standards
Non-solidifying Substance

Non-solidifying Substance

Definition(s)

Non-solidifying Substance

Non-solidifying Substance means a noxious liquid substance, which is not a Solidifying Substance.  <Annex II, Chapter 1, Regulation 1>. Source: Resolution MEPC.118(52), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Revised Annex II of MARPOL 73/78), 15 October 2004, International Maritime Organization. Legislation
Solidifying Substance

Solidifying Substance

Definition(s)

Solidifying Substance

Solidifying Substance means a noxious liquid substance which: 1 in the case of a substance with a melting point of less than 15°C which is at a temperature of less than 5°C above its melting point at the time of unloading; or 2 in the case of a substances with a melting point of equal to or greater than 15°C which is at a temperature of less than 10°C above its melting point at the time of unloading.  <Annex II, Chapter 1, Regulation 1>. Source: Resolution MEPC.118(52), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Revised Annex II of MARPOL 73/78), 15 October 2004, International Maritime Organization. Legislation
Similar Stage of Construction

Similar Stage of Construction

Definition(s)

Similar Stage of Construction

Similar stage of construction means the stage at which: 1 construction identifiable with a specific ship begins; and 2 assembly of that ship has commenced comprising at least 50 tons or one per cent of the estimated mass of all structural material, whichever is less.  <Annex II, Chapter 1, Regulation 1> Source: Resolution MEPC.118(52), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Revised Annex II of MARPOL 73/78), 15 October 2004, International Maritime Organization. Legislation Source: Resolution MEPC.176(58), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships (Revised MARPOL Annex VI), 10 October 2008, International Maritime Organization. Legislation
Ship Constructed

Ship Constructed

Definition(s)

Ship Constructed

Ship constructed means a ship the keel of which is laid or which is at a similar stage of construction. A ship converted to a chemical tanker, irrespective of the date of construction, shall be treated as a chemical tanker constructed on the date on which such conversion commenced. This conversion provision shall not apply to the modification of a ship, which complies with all of the following conditions: 1 the ship is constructed before 1 July 1986; and 2 the ship is certified under the Bulk Chemical Code to carry only those products identified by the Code as substances with pollution hazards only.  <Annex II, Chapter 1, Regulation 1> Source: Resolution MEPC.118(52), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Revised Annex II of MARPOL 73/78), 15 October 2004, International Maritime Organization. Legislation  

Ships Constructed

Ships constructed means ships the keels of which are laid or which are at a similar stage of construction. Source: Resolution MEPC.176(58), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships (Revised MARPOL Annex VI), 10 October 2008, International Maritime Organization. Legislation
Residue/Water Mixture

Residue/Water Mixture

Definition(s)

Residue/Water Mixture

Residue/water mixture means residue to which water has been added for any purpose (e.g. tank cleaning, ballasting, bilge slops).  <Annex II, Chapter 1, Regulation 1> Source: Resolution MEPC.118(52), amendments to the Annex of the Protocol of 1978 relating to the International Convention for the Prevention of Pollution from Ships, 1973 (Revised Annex II of MARPOL 73/78), 15 October 2004, International Maritime Organization. Legislation
Permanent Guidebase

Permanent Guidebase

Definition(s)

Permanent Guidebase

Structure that sets alignment and orientation relative to the wellhead system and provides entry guidance for running equipment on or into the wellhead assembly. Source: API STD 65 – Part 2, Isolating Potential Flow Zones During Well Construction, Upstream Segment, Second Edition, December 2010. Global Standards