Qualification Test

Qualification Test

Definition(s)

Qualification Test

A one-time (prototype) test program performed on a newly designed or significantly redesigned control system or component to validate conformance with design specifications. 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 Standards  
Pressure Biased Control System

Pressure Biased Control System

Definition(s)

Pressure Biased Control System

A discrete hydraulic control system utilizing a means to maintain an elevated pressure level (less than control valve actuation pressure) on pilot lines such that hydraulic signal transmission time is reduced. 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 Standards
Precharge

Precharge

Definition(s)

Precharge

See accumulator precharge. 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 Standards
Power Fluid

Power Fluid

Definition(s)

Power Fluid

Pressurized fluid dedicated to the direct operation of functions. 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 Standards
Potable Water

Potable Water

Definition(s)

Potable Water

Water that is fit to drink.
  • Note: 1 to entry: In most developed countries, water supplied to commerce and industry is fit to drink even though a small amount is actually consumed or used in food preparation.
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

Potable Water

A water supply that is acceptably pure for human consumption. Note: On an offshore rig, it is usually produced by watermakers and used as supply water for mixing control fluid for a subsea control system. 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 Standards
Pop-Up Display/Control Dialog Box

Pop-Up Display/Control Dialog Box

Definition(s)

Pop-Up Display/Control Dialog Box

A display or control that appears on a computer screen to allow increased access to a control item. An auxiliary display of data, a message, or a supplemental operational request, either as a result of a command given to a control system by an operator, or a system alarm notification. 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 Standards
Pipe Rams

Pipe Rams

Definition(s)

Pipe Rams

Rams whose ends are contoured to seal around pipe to close the annular space. 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 Standards
Pipe Ram BOP

Pipe Ram BOP

Definition(s)

Pipe Ram BOP

A hydraulically operated assembly typically having two opposed ram assemblies that move inward to close on pipe in the wellbore and seal the annulus. 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 Standards
Pilot Line

Pilot Line

Definition(s)

Pilot Line

A line that transmits pilot fluid to operate a control valve. 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 Standards  
Pilot Fluid

Pilot Fluid

Definition(s)

Pilot Fluid

Control fluid that is dedicated to the pilot supply system. 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 Standards  
Paging

Paging

Definition(s)

Paging

A computer display method of conveying or mapping between displays or screens to allow increased information or control utilizing multiple screens, but not displayed simultaneously. 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 Standards
Non-Retrievable Control Pod

Non-Retrievable Control Pod

Definition(s)

Non-Retrievable Control Pod

A pod that is fixed in place on the LMRP and not retrievable independently. 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 Standards
Multiplex (MUX) Control System

Multiplex (MUX) Control System

Definition(s)

Multiplex (MUX) Control System

A system utilizing electrical or optical conductors in an armored subsea umbilical cable such that, on each conductor, multiple distinct functions are independently operated by dedicated serialized coded commands. Note: Solenoid-operated valves in turn activate pilot-operated valves assigned to functions. 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 Standards
Mixing System

Mixing System

Definition(s)

Mixing System

A system that mixes a measured amount of water soluble lubricant and, optionally, glycol to feed water and delivers it to a storage tank or reservoir. 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 Standards
Limit Switch

Limit Switch

Definition(s)

Limit Switch

A hydraulic, pneumatic or electrical switch that indicates the motion or position of a device. 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 Standards
Lower Marine Riser Package (LMRP)

Lower Marine Riser Package (LMRP)

Definition(s)

LMRP (Lower Marine Riser Package)

The upper section of a two-section subsea BOP stack consisting of the hydraulic connector, annular BOP(s), flex/ball joint, riser adapter, flexible choke and kill lines, and subsea control pods. Note: This interfaces with the lower subsea BOP stack. 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 Standards
Junction Box (J-Box) (Hydraulic or Pneumatic)

Junction 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 Standards
Junction Box (J-Box) (Electrical)

Junction 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 Standards
Hydrophone

Hydrophone

Definition(s)

Hydrophone

A mechanical connector that is activated hydraulically and connects the BOP stack to the wellhead or the LMRP to the BOP stack. 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 Standards
Hydraulic Conduit

Hydraulic Conduit

Definition(s)

Hydraulic Conduit

An auxiliary line on a marine drilling riser used for transmission of control fluid between the surface and the subsea BOP stack. 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 Standards
Hose Bundle

Hose Bundle

Definition(s)

Hose Bundle

See control hose bundle. 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 Standards
Electro-Hydraulic (EH) Control System

Electro-Hydraulic (EH) Control System

Definition(s)

Electro-Hydraulic (EH) Control System

A system utilizing electrical conductor wires in an armored subsea umbilical cable to transmit command signals to solenoid-operated valves which in turn activate pilot operated control valves assigned to functions. Note: One pair of wires is dedicated to each function. 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 Standards
Electric Pump

Electric Pump

Definition(s)

Electric Pump

An electrically driven hydraulic pump, usually a three-plunger (triplex) pump. 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 Standards
Dynamic Positioning (Automatic Station Keeping)

Dynamic Positioning (Automatic Station Keeping)

Definition(s)

Dynamic Positioning (Automatic Station Keeping)

A computerized means of maintaining a vessel on location by selectively driving thrusters. 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 Standards
“Dunking” Transducer

“Dunking” Transducer

Definition(s)

“Dunking” Transducer

A portable hydrophone. 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 Standards
Disconnect

Disconnect

Definition(s)

Disconnect

1. Unlatch and separation of the LMRP connector from its mandrel. 2. Unlatch and separation of the BOP stack connector from the wellhead. 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 Standards
Disarm

Disarm

Definition(s)

Disarm

To disable the operation of a critical function or functions. 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 Standards
Dedicated

Dedicated

Definition(s)

Dedicated

An element or system that is exclusively used for a specific purpose. 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 Standards
Control Valve (Subsea Control System)

Control Valve (Subsea Control System)

Definition(s)

Control Valve (Subsea Control System)

A pilot operated valve in the subsea control pod that directs power fluid to operate a function. 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 Standards
Control Valve (Surface Control System)

Control Valve (Surface Control System)

Definition(s)

Control Valve (Surface Control System)

A valve mounted on the hydraulic manifold which directs hydraulic power fluid to the selected function (such as annular BOP close) while simultaneously venting the opposite function (annular BOP open). 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 Standards