V

V

Definition(s)


V

Volts. Source: API RP 67, Recommended Practice for Oilfield Explosives Safety, Upstream Segment, Second Edition, May 2007. Global Standards  

V

Volume of the conical spudcan below mudline when z = ym.

Source: ABS Guidance Notes on Geotechnical Performance of Spudcan Foundations, January 2017. Global Standards
V-door

V-door

Definition(s)


V-door

The opening in the derrick leading from the derrick floor to the catwalk and pipe rack area. Source: API RP 54, Recommended Practice for Occupational Safety for Oil and Gas Well Drilling and Servicing Operations, Third Edition, August 1999 (2007). Global Standards  
V-door Ramp

V-door Ramp

Definition(s)


V-door ramp

A slide-like ramp used to pick up and lay down tools to and from the catwalk/pipe rack area. Also used to pick up drill pipe, drill collars or any other heavy equipment that could not be done safely because of the height of the substructure and close proximity to the blowout preventers, electric and hydraulic lines, and other equipment in the area. Source: API RP 54, Recommended Practice for Occupational Safety for Oil and Gas Well Drilling and Servicing Operations, Third Edition, August 1999 (2007). Global Standards  
VAC

VAC

Definition(s)


VAC

Volts alternating current. Source: API SPEC 17F, Specification for Subsea Production Control Systems, Second Edition, December 2006 (Reaffirmed April 2011). Global Standards    
Vacated Area

Vacated Area

Definition(s)


Vacated area

Vacated area has the meaning given by section 14. Source: Offshore Petroleum and Greenhouse Gas Storage Act 2006, Australia, amended 2012. Legislation  
Vacuum

Vacuum

Definition(s)


Vacuum

"Vacuum" means pressure below the prevailing pressure of the atmosphere. Source: Corporation Commission, Oil and Gas Conservation, Oklahoma Administrative Code 165:10, February 2013. Regulations
Vacuum Insulated Tubing

Vacuum Insulated Tubing

Definition(s)


Vacuum insulated tubing

VIT consists of a double tubing wall welded together on either the ID or OD of the joint. The vacuum between the two pipes achieves very low thermal conductivity to reduce heat transfer from the tubing to the surrounding annuli. Source: API RP 96, Deepwater Well Design and Construction, First Edition, March 2013. Global Standards  
VAD

VAD

Definition(s)


VAD

Vacuum arc degassing. Source: API SPEC 5CRA, Specification for Corrosion Resistant Alloy Seamless Tubes for Use as Casing, Tubing and Coupling Stock, Upstream Segment, First Edition, February 2010 (Errata August 2011). Global Standards
Vadose Zone

Vadose Zone

Definition(s)


Upstream Facility

“Vadose zone” means unsaturated earth material below the land surface and above ground water, or in between bodies of ground water. Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. Regulations
Valid

Valid

Definition(s)


Valid

In this part of ISO 10426, calibrating an instrument refers to assuring the accuracy of the measurement. Accuracy is the degree of conformity of a measurement of a quantity to its actual or true value. Accuracy is related to precision, or reproducibility, of a measurement. Precision is the degree to which further measurements or calculations will show the same or similar results. Precision is characterized in terms of the standard deviation of the measurement. The results of calculations or a measurement can be accurate, but not precise, precise but not accurate, neither or both. A result is valid if it is both accurate and precise. Source: API SPEC 10A, Specification for Cements and Materials for Well Cementing, Twenty-fourth Edition, December 2010. Global Standards
Valid Certificates

Valid Certificates

Definition(s)

Valid Certificates

Valid certificate means certificate issued by an independent party (including any member of the classification society) for a fixed time period. Source: Guidance Notes on Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, Oil Industry Safety Directorate (India), 2012. Regulatory Guidance

Valid Certificates

A certificate that has been issued directly by a Party to a relevant convention or on its behalf by a recognized organization and contains accurate and effective dates meets the provisions of the relevant convention and to which the particulars of the ship, its crew and its equipment correspond. Source: IMO resolution A.1052(27), Procedures for Port State Control, 2011, 201 December 2011, International Maritime Organization. Regulatory Guidance
Validation

Validation

Definition(s)


Validation

Confirmation that the operational requirements for a specific use or application have been fulfilled through the provision of objective evidence. NOTE Typically validation is achieved by qualification testing and/or system integration testing. Source: API Recommended Practice 17H, Remotely Operated Tools and Interfaces on Subsea Production Systems, Second Edition, June 2013 (Addendum 1, October 2014). Global Standards

Validation

A quality assurance process of establishing evidence that provides a high degree of assurance that a product, service, or system will accomplish its intended purpose. NOTE This often involves acceptance of fit-for-purpose with end users and other product stakeholders. NOTE 2 In this document, the related term “validation” is used only with respect to the initial design of equipment (i.e. capacity calculations and any performance confirmation tests in a lab rather than in the well). Source: API RP 96, Deepwater Well Design and Construction, First Edition, March 2013. Global Standards  

Validation

confirmation through the use of objective evidence that the requirements for a specific intended use or application have been fulfilled Source: ISO/IEC TS 17027:2014, Conformity assessment – Vocabulary related to competence of persons used for certification of persons, Global Standards  

Validation

Confirmation, through the provision of objective evidence, that the requirements for a specific intended use or application have been fulfilled [SOURCE: ISO 9000:2005]. Source: ISO/IEC 27000:2014, Information technology — Security techniques — Information security management systems — Overview and vocabulary, Third Edition, January 2014. Global Standards  

Validation

A validation of a proposed facility is a statement in writing by an independent validator in respect of the design, construction and installation (including instrumentation, process layout and process control systems) of the facility, to the extent that these matters are covered by the scope of the validation agreed between NOPSEMA and the operator. A validation of a proposed significant change to an existing facility is a statement in writing by an independent validator in respect of the proposed change, to the extent required by the scope of the validation agreed between NOPSEMA and the operator. Source: Offshore Petroleum and Greenhouse Gas Storage (Safety) Regulations 2009 (Select Legislative Instrument 2009 No. 382 as amended), Australia, prepared on 1 January 2012. Regulations
Validation Process

Validation Process

Definition(s)


Validation process

The validation process is the methodology to incorporate the basis of design in system testing and validate the results of the verification process. Source: API TR 1PER15K-1, Protocol for Verification and Validation of High-pressure High-temperature Equipment, First Edition, March 2013. Global Standards  
Validation Test

Validation Test

Definition(s)


Validation Test

Test performed to qualify a particular size, type and model of equipment for a specific class of service. NOTE See Annex B for details. Source: API SPEC 14A, Specification for Subsurface Safety Valve Equipment, Eleventh Edition, October 2005 (Reaffirmed June 2012). Global Standards
Validity

Validity

Definition(s)


Validity

evidence that the assessment measures what it is intended to measure, as defined by the certification scheme [SOURCE: ISO/IEC 17024:2012, 3.17, modified — Note to entry has been deleted.]. Source: ISO/IEC TS 17027:2014, Conformity assessment – Vocabulary related to competence of persons used for certification of persons, Global Standards
Value Chain

Value Chain

Definition(s)


Value Chain

Interlinked activities of the company, suppliers, customers and other stakeholders that convert inputs into beneficial outputs (i.e. products). Mapping a company's value chain can support understanding of risks and help set boundaries when considering impacts of activities. For an oil and gas company, the value chain refers to the full lifecycle of its products, including the processes of extraction, production, refining, marketing, consumption and disposal/recycling. Stakeholders in the input side of the value chain include suppliers and contractors- the "supply chain". Stakeholders in the output side include the "customer chain", which may include resellers, retailers and consumers. 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 Standards
Value of Statistical Life

Value of Statistical Life

Definition(s)


Value of Statistical Life

Amount people are willing to pay to reduce risk so that on average one less person is expected to die from the risk. Sample Usage: The analyst estimates the monetary value of the mortality risk reduction from the initiative by using the VSL estimate. Annotation:
  1. The VSL is not intended to value very large reductions in mortality risk or place a value on the lives of identified individuals. VSL measures the monetized value of small reductions in mortality risk for a large number of people. For example, a countermeasure that reduces the annual risk of death by one in a million for 20 million people will, on average, save 20 lives a year. If the VSL is estimated at $5 million, the value of this mortality risk reduction is $100 million (20 expected lives saved times $5 million per life).
  2. Most VSL estimates are based on studies of the wage compensation for occupational hazards or studies that elicit people’s willingness to pay for mortality risk reduction directly.
Source: DHS Risk Lexicon, U.S. Department of Homeland Security, 2010 Edition. September 2010 Regulatory Guidance
Valve

Valve

Definition(s)


Valve

Device used to stop or control the rate of flow in a line or vessel or to serve as an automatic or semiautomatic safety device. Common valves include the butterfly, gate, plug, globe, needle, check, and pressure relief. Source: IADC UBO / MPD Glossary, December 2011. Global Standards

Valve

A device for regulating or controlling the flow of material by means of a movable part or parts which open or close a passage. Source: Petroleum Safety Orders--Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. Regulations
Valve Actuators

Valve Actuators

Definition(s)


Valve Actuators

General - devices that, in response to a signal, automatically move the valve to the desired position using an outside power source. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Valve Actuators Hydraulic/Electro-hydraulic

Valve Actuators Hydraulic/Electro-hydraulic

Definition(s)


Valve Actuators Hydraulic/Electro-hydraulic

Hydraulic and electro-hydraulic valve actuators convert fluid pressure into motion.. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Valve Actuators Manual

Valve Actuators Manual

Definition(s)


Valve Actuators Manual

By definition, require no outside power source. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Valve Actuators Pneumatic

Valve Actuators Pneumatic

Definition(s)


Valve Actuators Pneumatic

Pneumatic valve actuators that convert air pressure into motion. Source: IADC UBO / MPD Glossary, December 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  
Valve Drilling Operation

Valve Drilling Operation

Definition(s)


Valve drilling operation

Drilling of a hole through the blocking element of a valve that is stuck in the closed position with pressure on the well side of the valve. The drilling is accomplished through a lubricator assembly that confines the pressure after the blocking element is penetrated. Source: API RP 54, Recommended Practice for Occupational Safety for Oil and Gas Well Drilling and Servicing Operations, Third Edition, August 1999 (2007). Global Standards  

Valve drilling operation

“Valve drilling operation” means the drilling of a hole through the blocking element of a valve that is struck in the closed position with pressure on the well side of the valve. [Mich. Admin. Code R 408 (2013)]. Source: Oil and Gas Drilling and Servicing Operations, Michigan Administrative Code R 408, February 8, 2013. Regulations  
Valve Flow Coefficient

Valve Flow Coefficient

Definition(s)


Valve Flow Coefficient

Specifies the friction coefficient for a valve. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Valve Position Indicators

Valve Position Indicators

Definition(s)


Valve Position Indicators

Are devices that show the position of the closure element. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Valve Positioners

Valve Positioners

Definition(s)


Valve Positioners

Valve positioners compare the control signal to the actuator's position and move the actuator accordingly. Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Valve Regulated Cell

Valve Regulated Cell

Definition(s)


Valve Regulated Cell

A secondary cell which is closed under normal conditions but has an arrangement which allows the escape of gas if the internal pressure exceeds a predetermined value. The cell cannot normally receive addition to the electrolyte. Source: IEC 61892-7, Mobile and fixed offshore units – Electrical installations – Part 7: Hazardous areas. Global Standards
Valve Regulated Lead Acid Battery

Valve Regulated Lead Acid Battery

Definition(s)


Valve Regulated Lead Acid Battery

secondary battery in which cells are closed but have a valve which allows the escape of gas if the internal pressure exceeds a predetermined value Note 1 to entry: The cell or battery cannot normally receive addition to the electrolyte. Note 2 to entry: This note applies to the French language only. [SOURCE IEC 60050-482:2004, 482.05.15]. Source: IEC 61892-6, Mobile and fixed offshore units – Electrical installations – Part 6: Installation, Third Edition, December  2013. Global Standards
Valve Station

Valve Station

Definition(s)


Valve station

Valve station means:
  1. a greenhouse gas valve station; or
  2. a petroleum valve station.
Source: Offshore Petroleum and Greenhouse Gas Storage Act 2006, Australia, amended 2012. Legislation