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
Single

Single

Definition(s)

Single

One joint of drill pipe, rod, or other tubular goods. 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  
Single Operator Action

Single Operator Action

Definition(s)

Single Operator Action

A procedure achieved by no more than one hard-key or soft-key action, excluding any necessary cursor movements, or voice actuation using programmed codes. Source: IMO Resolution MSC.302(87), Performance standards for bridge alert management, 17 May 2010, International Maritime Organization. Regulatory Guidance
Single Point Mooring

Single Point Mooring

Definition(s)

Single Point Mooring

Mooring system that allows the floating structure to which it is connected to vary its heading (weathervane). EXAMPLE One example of a single point mooring is a turret mooring system where a number of mooring lines are attached to a turret, which includes bearings to allow the structure to rotate. Source: ISO 19901-7:2013, Petroleum and natural gas industries – Specific requirements for offshore structures – Part 7: Stationkeeping systems for floating offshore structures and mobile offshore units. Global Standards
Single Point Safety Switch

Single Point Safety Switch

Definition(s)

Single Point Safety Switch

A single keylock safety switch with a properly secured single key which isolates all power from the wireline prior to attachment of an explosive device. Source: API RP 67, Recommended Practice for Oilfield Explosives Safety, Upstream Segment, Second Edition, May 2007. Global Standards
Single Seal

Single Seal

Definition(s)

Single Seal

One barrier or multiple barriers that cannot be physically differentiated in their function. Source: API RP 5C5, Recommended Practice on Procedures for Testing Casing and Tubing Connections, Third Edition, July 2003 (Reaffirmed August 2010). Global Standards
Single Stage Pump

Single Stage Pump

Definition(s)

Single Stage Pump

One impeller and single stage of pressurization. Source: IADC UBO / MPD Glossary, December 2011. 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
Sistema de Barreras

Sistema de Barreras

Definition(s)

Sistema de Barreras

Una combinación de barreras actuando en conjunto para prevenir un flujo involuntario de fluidos desde el pozo. Los sistemas de barreras pueden incluir tanto barreras fisicas como operacionales.

Source: Resolución Número 40687 de 18 Jul 2017 Por la cual se establecen los criterios técnicos para proyectos de perforación exploratoria de hidrocarburos costa afuera en Colombia. Columbia Ministerio de Minas y Energia, Regulations
SIT

SIT

Definition(s)

SIT

System integration test. 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    
Site

Site

Definition(s)

Site

Location where piping system is installed. 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

Site

A unique location of a business operation. (GEMI, 2012) Source: Identifying and assessing water sources: Guidance document for the onshore oil and gas industry, International Petroleum Industry Environmental Conservation Association (IPIECA), 2014. Global Standards
Site Clearance

Site Clearance

Definition(s)

Site Clearance

Final cleanup of seafloor debris. Source: API RP 2SIM, Structural Integrity Management of Fixed Offshore Structures, First Edition, November 2014. Global Standards
Site Closing Certificate

Site Closing Certificate

Definition(s)

Site closing certificate

Site closing certificate means a certificate issued under section 392. Source: Offshore Petroleum and Greenhouse Gas Storage Act 2006, Australia, amended 2012. Legislation  
Site Plan

Site Plan

Definition(s)

Site plan

Site plan, in relation to an identified greenhouse gas storage formation, has the meaning given by section 24. Source: Offshore Petroleum and Greenhouse Gas Storage Act 2006, Australia, amended 2012. Legislation  
Site Response Analysis

Site Response Analysis

Definition(s)

Site Response Analysis

Upward wave propagation analysis from underlying bedrock to seafloor permitting the evaluation of the effect of local geological and soil conditions on the design ground motions at a given site. NOTE The site response analysis results can include amplitude, frequency content, and duration. Source:API RP 2EQ, Seismic Design Procedures and Criteria for Offshore Structures, First Edition, November 2014. Global Standards
SITHP

SITHP

Definition(s)

SITHP

Shut-in tubing head pressure. Source: API RP 17A, Design and Operation of Subsea Production Systems—General Requirements and Recommendations, Fourth Edition, Reaffirmed 2011. Global Standards  
SITP

SITP

Definition(s)

SITP

Shut-in tubing pressure. Source: API Standard 2RD, Dynamic Risers for Floating Production Systems, Second Edition, September 2013. Global Standards
Situational Awareness

Situational Awareness

Definition(s)

Situational Awareness

Comprehending information about the current and developing security posture and risks, based on information gathered, observation and analysis, and knowledge or experience. Extended Definition: In cybersecurity, comprehending the current status and security posture with respect to availability, confidentiality, and integrity of networks, systems, users, and data, as well as projecting future states of these. Adapted from: CNSSI 4009, DHS personnel, National Response Framework. Source: NICCS™ Portal Cybersecurity Lexicon, National Initiative for Cybersecurity Careers and Studies (https://niccs.us-cert.gov/glossary) as of 11 November 2015, Global Standards
Situations of Hazard and Accident

Situations of Hazard and Accident

Definition(s)

Situations of Hazard and Accident

The situations of hazard and accident also include situations of hazard and accident other than the defined, complex situations of hazard and accident, stress situations and situations where key personnel are incapacitated or are unable to carry out their duties. Source: Guidance Notes on Petroleum and Natural Gas (Safety in Offshore Operations) Rules, 2008, Oil Industry Safety Directorate (India), 2012. Regulatory Guidance
Size

Size

Definition(s)

Size

Relevant dimensional characteristics of the equipment as defined by the manufacturer. Source: API SPEC 14A, Specification for Subsurface Safety Valve Equipment, Eleventh Edition, October 2005 (Reaffirmed June 2012). Global Standards
Size Class

Size Class

Definition(s)

Size Class

Designation of the dimensional interchangeability of equipment specified herein. Source: API SPEC 7K, Drilling and Well Servicing Equipment Upstream Segment, Fifth Edition, June 2010 (August 2010). Global Standards Source:API SPECIFICATION 7K, Drilling and Well Servicing Equipment, Sixth Edition, December 2015. Global Standards  

Size Class

Designation by which dimensionally-interchangeable equipment of the same maximum load rating is identified. Source: API SPEC 8C, Drilling and Production Hoisting Equipment (PSL 1 and PSL 2), Fifth Edition, April 2012. Global Standards
Size Range

Size Range

Definition(s)

Size Range

Range of tubular diameters to which an assembly is applicable. Source: API SPEC 7K, Drilling and Well Servicing Equipment Upstream Segment, Fifth Edition, June 2010 (August 2010). Global Standards Source:API SPECIFICATION 7K, Drilling and Well Servicing Equipment, Sixth Edition, December 2015. Global Standards  

Size Range

Range of tubular diameters covered by an assembly. Source: API SPEC 8C, Drilling and Production Hoisting Equipment (PSL 1 and PSL 2), Fifth Edition, April 2012. Global Standards
Sizing Agent

Sizing Agent

Definition(s)

Sizing Agent

Coating on glass fibres used to promote bonding of glass-reinforcement to resin. 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
SJA

SJA

Definition(s)

SJA

Safe job analysis Source: Rules for Classification and Construction, IV Industrial Services, 6 Offshore Technology, 9 Guideline for Personnel Transfers by Means of Lifting Appliances, Edition 2011, Germanischer Lloyd SE, Global Standards
Skelp

Skelp

Definition(s)

Skelp

Coil or strip of metal produced to a certain thickness, width, and edge configuration from which welded pipe is made. Source: API RP 5A5, Field Inspection of New Casing, Tubing, and Plain-end Drill Pipe, Reaffirmed August 2010. Global Standards  

Skelp

Hot-rolled steel strip used for manufacturing EW pipe. Source: API SPEC 5CT, Specification for Casing and Tubing, Upstream Segment, Ninth Edition, July 2011 (Errata September 2012). Global Standards
Skid Rail

Skid Rail

Definition(s)

Skid Rail

Structural steelwork that provides smooth flat surfaces for the drilling equipment set to move in an X-Y planes to allow access over all well slots
  • Note: 1 to entry: The upper skid rail is the slide skid rail of the upper substructure of the drilling rig; the lower skid rail is that of the lower substructure.
Source: ISO 18647:2017, Petroleum and natural gas industries — Modular drilling rigs for offshore fixed platforms, First Edition, August 2017. Global Standards
Skid System

Skid System

Definition(s)

Skid System

Storage, transportation, lifting, and testing frames to facilitate movement of the ROT systems and the modules and components to be replaced or installed. NOTE Skids are used in combination with a skidding system. Source: API Recommended Practice 17H, Remotely Operated Tools and Interfaces on Subsea Production Systems, Second Edition, June 2013 (Addendum 1, October 2014). Global Standards
Skidding System

Skidding System

Definition(s)

Skidding System

Equipment that can include the skid rails, skid shoe, fwd/aft skidding claws, skidding cylinders, locking claws, skidding hydraulic power unit (HPU), locking and control unit, used for horizontal movement of the DES, covering the well slot area.
  • Note: 1 to entry: Alternative rig skidding systems can be used as well.
Source: ISO 18647:2017, Petroleum and natural gas industries — Modular drilling rigs for offshore fixed platforms, First Edition, August 2017. Global Standards
Skill

Skill

Definition(s)

Skill

An employee’s ability to perform the job tasks consistently, precisely, and reliably. Skills can be assessed.

Source: International Association of Drilling Contractors, Competence Assurance-Guidelines for Building a Successful Program Revision April 2015. IADC Guidelines  

Skill

ability to perform a task or activity with a specific intended outcome acquired through education, training, experience or other means Source: ISO/IEC TS 17027:2014, Conformity assessment – Vocabulary related to competence of persons used for certification of persons, Global Standards
Skilled Personnel

Skilled Personnel

Definition(s)

Skilled Personnel

Persons whose training has included instruction on the various types of protection and installation practices, the requirements of this standard, the relevant national regulations/company rules applicable to the installation and on the general principles of area classification. Source: IEC 60079-17:2013, Explosive atmospheres – Part 17: Electrical installations inspection and maintenance, Edition 5.0, November 2013. Global Standards