Su_undisturbed

Su_undisturbed

Definition(s)


Su_undisturbed

Undisturbed undrained shear strength.

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

Sutop

Definition(s)


Sutop

Undrained shear strength of the top strong clay.

Source: ABS Guidance Notes on Geotechnical Performance of Spudcan Foundations, January 2017. Global Standards
Su,plugbase

Su,plugbase

Definition(s)


Su,plugbase

Undrained shear strength corresponding to the level of the sand plug base.

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

Sum

Definition(s)


Sum

Shear strength intercept at the layer’s surface.

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

SuH

SuH

Definition(s)


SuH

Shear strength at the back flow depth hc.

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

Su_footprint

Definition(s)


Su_footprint

Footprint undrained shear strength.

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

Subs

Definition(s)


Subs

Shear strength intercept at the clay layer’s surface in strong overlying soft soil.

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

Sua

Sua

Definition(s)


Sua

Undrained shear strength averaged from (h ht) to (h + hplug).

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

Stomping

Definition(s)


Stomping

A process where a spudcan is initially emplaced away from the center of an old footprint and then the spudcan is used to displace soil towards the old footprint at desired positions to widen the disturbed region. In soft to stiff clay, stomping is very effective in mitigating spudcan footprint interaction.

Source: ABS Guidance Notes on Geotechnical Performance of Spudcan Foundations, January 2017. Global Standards
Soil Sampling

Soil Sampling

Definition(s)


Soil Sampling

A suitably stored, small amount of soil for visual inspection and laboratory testing for the determination of the soil unit geological provenance, characteristics and geotechnical engineering design parameters.

Source: ABS Guidance Notes on Geotechnical Performance of Spudcan Foundations, January 2017. Global Standards
Simultaneous Preloading

Simultaneous Preloading

Definition(s)


Simultaneous Preloading

During preloading the hull is held with minimal draft or air gap and the preload is incrementally increased on all the legs simultaneously.

Source: ABS Guidance Notes on Geotechnical Performance of Spudcan Foundations, January 2017. Global Standards
Suspended well

Suspended well

Definition(s)


Suspended well

Well that has been temporarily isolated from the producing reservoir
  • Note: 1 to entry: Components above the isolation device are no longer considered flow-wetted.
Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
SPM

SPM

Definition(s)


SPM

Side Pocket Mandrel. Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards
SSD

SSD

Definition(s)


SSD

Safety Shutdown System. Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
Superimposed Backpressure

Superimposed Backpressure

Definition(s)


Superimposed Backpressure

Static pressure that exists at the outlet of a pressure-relief device at the time the device is required to operate.
  • NOTE: It is the result of pressure in the discharge system coming from other sources and can be constant or variable.
Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
Storage Vessel

Storage Vessel

Definition(s)


Storage Vessel

Fixed tank or vessel that is not part of the processing unit in petrochemical facilities, refineries, gas plants, oil and gas production facilities, and other facilities.
  • NOTE: 1 See process tank (3.1.61).
  • NOTE: 2 These tanks or vessels are often located in tank farms.
Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
Storage Tank

Storage Tank

Definition(s)


Storage Tank

Fixed tank or vessel that is not part of the processing unit in petrochemical facilities, refineries, gas plants, oil and gas production facilities, and other facilities.
  • NOTE: 1 See process tank (3.1.61).
  • NOTE:  2 These tanks or vessels are often located in tank farms.
Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
Stoichiometric Air/Fuel Ratio

Stoichiometric Air/Fuel Ratio

Definition(s)


Stoichiometric Air/Fuel Ratio

Chemically correct ratio of air to fuel capable of perfect combustion with no unused fuel or air.

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

SIS

Definition(s)


SIS

Safety instrumented system. Source:  DNVGL-RP-G108, Cyber security in the oil and gas industry based on IEC 62443, DNV GL, September 2017. Global Standards Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards 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

SIS

System composed of sensors, logic solvers, and final control elements for the purpose of taking the process to a safe state when predetermined conditions are met.
  • NOTE: Other terms commonly used for a SIS include emergency shutdown system (ESD, ESS), safety shutdown system (SSD), and safety interlock system (see E.3.3.1).
Source: API STD 521, Pressure-relieving and Depressuring Systems, Sixth Edition, January 2014. Global Standards
Security Risk Assessment

Security Risk Assessment

Definition(s)


Security Risk Assessment (SRA)

An assessment for the purposes of determining security risk.

Source: API RP 781 Security Plan Methodology for the Oil and Natural Gas Industries.1st Ed. September 2016. Global Standards

Security Risk Assessment

A SRA is a risk assessment for the purposes of determining security risk.

Source:API STANDARD 780, Security Risk Assessment Methodology for the Petroleum and Petrochemical Industries, First Edition, May 2013. Global Standards
Security Risk

Security Risk

Definition(s)


Security Risk

The likelihood of a threat successfully exploiting vulnerability and the resulting degree of damage or impact.

Source:API STANDARD 780, Security Risk Assessment Methodology for the Petroleum and Petrochemical Industries, First Edition, May 2013. Global Standards
Security Plan

Security Plan

Definition(s)


Security Plan

A document that describes an owner's/operator's plan to address security issues and related events, including security assessment and mitigation options. This includes security alert levels and response measures to security threats.

Source:API STANDARD 780, Security Risk Assessment Methodology for the Petroleum and Petrochemical Industries, First Edition, May 2013. Global Standards
Security Layers of Protection

Security Layers of Protection

Definition(s)


Security Layers of Protection

Also known as concentric "rings of protection," a concept of providing multiple independent and overlapping layers of protection in depth. For security purposes, this may include various layers of protection such as countersurveillance, counterintelligence, physical security, and cyber security. A second consideration is the balance of the security measures such that equivalent risk exists regardless of the threat's pathway or method.

Source:API STANDARD 780, Security Risk Assessment Methodology for the Petroleum and Petrochemical Industries, First Edition, May 2013. Global Standards
Scenario

Scenario

Definition(s)


Scenario

Hypothetical situation comprised of an intentional act, an assumed threat, a set of consequences, and associated countermeasures to address the scenario.

Source:API STANDARD 780, Security Risk Assessment Methodology for the Petroleum and Petrochemical Industries, First Edition, May 2013. Global Standards
Safeguard

Safeguard

Definition(s)


Safeguard

Device, system, or action that either would likely interrupt the chain of events following an initiating event or that would mitigate the consequences. Source: API RP 781 Security Plan Methodology for the Oil and Natural Gas Industries.1st Ed. September 2016. Global Standards

Safeguard

Any device, system, or action that either would likely interrupt the chain of events following an initiating event or that would mitigate the consequences.

Source:API STANDARD 780, Security Risk Assessment Methodology for the Petroleum and Petrochemical Industries, First Edition, May 2013. Global Standards
Surface Treatment

Surface Treatment

Definition(s)


Surface Treatment

Process designed to alter the surface of a material to achieve a desired property such as hardness or corrosion resistance.

Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global Standards
Subassembly

Subassembly

Definition(s)


Subassembly

Subordinate unit consisting of two or more components assembled for incorporation as an integral portion of a tool, which may be independently performance tested before its integration.

Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global Standards
Stress Relieving

Stress Relieving

Definition(s)


Stress Relieving

Controlled heating of material to a predetermined temperature for the purpose of reducing any residual stresses.

Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global Standards
Stick-up

Stick-up

Definition(s)


Stick-up

Distance between the rotary table and the lower most part of the surface test tree.

Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global Standards
Service Center

Service Center

Definition(s)


Service Center

A location where equipment is inspected, repaired, and tested to maintain supplier/manufacturer’s specifications.

Source:API SPECIFICATION 19TT, Specification for Downhole Well Test Tools and Related Equipment, First Edition, October 2016. Global Standards