Glossary
Browse the IADC Lexicon alphabetically or by category. Get comprehensive definitions of drilling industry terms.
Stationary Internal Combustion Engine
Definition(s)
Stationary Internal Combustion Engine
An engine that is permanently attached to a fixed foundation. Source: Petroleum Safety Orders--Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. RegulationsStatic Electricity
Definition(s)
Static Electricity
The type of electrical charge resulting from the separation of materials, friction or similar causes. Source: Petroleum Safety Orders--Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. RegulationsStandpipe
Definition(s)
Standpipe
A vertical pipe which joins the rotary hose to the circulating system. Source: Petroleum Safety Orders--Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. RegulationsSource of Ignition
Definition(s)
Source of Ignition
Any flame, arc, spark, or heat capable of igniting flammable liquids, gases or vapors. Source: Petroleum Safety Orders--Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. RegulationsSlips
Definition(s)
Slips
The wedge-shaped pieces of metal with gripping elements used to prevent pipe from slipping down the well bore. Source: Petroleum Safety Orders--Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. RegulationsSecured
Definition(s)
Secured
The device or object referred to is so anchored that it will not become accidentally detached, displaced or removed under normal use or foreseen circumstances. Source: Petroleum Safety Orders--Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. RegulationsSamson Post
Definition(s)
Samson Post
The main upright post or column that supports the walking beam. Source: Petroleum Safety Orders--Drilling and Production, Definitions, California Code of Regulations, 8 CCR § 6505, December 2012. RegulationsSecondary Containment
Definition(s)
Secondary containment
An impermeable physical barrier specifically designed to prevent release into the environment of materials that have breached primary containment. Secondary containment systems include, but are not limited to, tank dykes, curbing around process equipment, drainage collection systems into segregated oily drain systems, the outer wall of double walled tanks etc. Source: OGP Report No. 456, Process Safety – Recommended Practice on Key Performance Indicators, International Association of Oil & Gas Producers, November 2011. Global StandardsSecondary containment
An impermeable physical barrier specifically designed to prevent release of materials into the environment that have already breached primary containment (i.e. an LOPC). Secondary containment systems include, but are not limited to, tank dykes, curbing around process equipment, drainage collection systems into segregated oily drain systems, the outer wall of double walled tanks, etc. Source: OGP Report No. 456, Process Safety – Recommended Practice on Key Performance Indicators, International Association of Oil & Gas Producers, November 2011. Global StandardsSOL
Definition(s)
SOL
Safe operating limits. Source: OGP Report No. 456, Process Safety – Recommended Practice on Key Performance Indicators, International Association of Oil & Gas Producers, November 2011. Global StandardsSIA
Definition(s)
SIA
Safety Instrumentation and Alarms. Source: OGP Report No. 456, Process Safety – Recommended Practice on Key Performance Indicators, International Association of Oil & Gas Producers, November 2011. Global StandardsSS
Definition(s)
SS
Stainless Steel Source: ISO 21457:2010, Petroleum and natural gas industries — Materials selection and corrosion control for oil and gas production systems, First Edition,September 2010. Global StandardsSuspend
Definition(s)
Suspend
"Suspend" means to plug a well in accordance with 20 AAC 25.110 and to reserve the option later to re-enter and- redrill the well; or
- complete the well as an oil, gas, or service well.
Suspend
Suspend, in relation to a well, means to render the well temporarily inoperative, and suspension has a corresponding meaning verification scheme has the meaning set out in regulation 54. Source: Health and Safety in Employment (Petroleum Exploration and Extraction) Regulations 2013, SR 2013/208, New Zealand, as of May 2013. RegulationsStratigraphic Test Well
Definition(s)
Stratigraphic Test Well
"Stratigraphic test well" means a hole drilled for the sole purpose of gaining structural or stratigraphic information to aid in exploring for oil and gas. Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. RegulationsStratigraphic Test Well
"Stratigraphic test well" means any well or hole, except a seismograph shot hole, drilled for the purpose of gathering information in connection with the oil and gas industry with no intent to produce oil or gas from such well. Source: Oil and gas Conservation, North Dakota Administrative Code, Chapter 43-02-03, April 2012. RegulationsStock Tank Barrel
Definition(s)
Stock Tank Barrel
"Stock tank barrel" means 42 U.S. gallons, measured at 60ø F and 14.65 psia. Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. RegulationsSTB
Definition(s)
STB
"Stb" means stock tank barrel. Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. RegulationsStandard Cubic Foot
Definition(s)
Standard Cubic Foot
"Standard cubic foot" has the meaning given to "cubic foot" in AS 31.05.170. Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. RegulationsSidetrack Operation
Definition(s)
Sidetrack Operation
"Sidetrack operation" means a drilling operation conducted for the purpose of straightening the original hole, bypassing junk, or correcting mechanical difficulties in the original hole. Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. RegulationsShut In
Definition(s)
Shut In
"Shut in" means to close a well's surface, wellhead, or subsurface valves to halt flow from or into the well, with the completion interval remaining open to the tubing below the closed valves. Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. RegulationsShut In
“Shut-in” means the status of a production well or an injection well that is temporarily closed down, whether by closing a valve or disconnection or other physical means. Source: Oil and Gas, New Mexico Administrative Code Title 19, Chapter 15, January 2013. RegulationsService Well
Definition(s)
Service Well
"Service well" means a well used for injecting water, gas, or other fluids into a reservoir or producing formation in pressure maintenance, enhanced recovery, or storage operations, for disposing of oil field wastes, or for conducting other operations in support of oil or gas production. Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. RegulationsService Well
"Service well" means a well that, as part of a multi-well system, is used for drilling laterals, stimulation, or maintenance, or functions in any capacity other than as a conduit to the surface for the production of oil and gas. Source: Corporation Commission, Oil and Gas Conservation, Oklahoma Administrative Code 165:10, February 2013. RegulationsSurvivability
Definition(s)
Survivability
Protection required by a barrier or equipment item to ensure continued operation during a major incident. Source: OGP Report No. 415, Asset integrity – the key to managing major incident risks, International Association of Oil & Gas Producers, December 2008. Global StandardsSale
Definition(s)
Sale
“Sale” includes exchange and transfer with consideration. Source: Law of Information Energy, Petroleum Act B.E. 2514 (1971), Thailand, as of June 2013. LegislationSale
“Sale” includes offer for sale, expose for sale and distribute. Source: Nova Scotia Offshore Petroleum Occupational Health & Safety Requirements, Canada-Nova Scotia Offshore Petroleum Board, Canada, December 2000. Regulations Source: Oil and Gas Occupational Safety and Health Regulations, SOR/87-612, Canada, current to April 29, 2013. RegulationsStore
Definition(s)
To store
“To store” means to undertake any operation in order to gather and keep in stock the petroleum produced by the concessionaire. Source: Law of Information Energy, Petroleum Act B.E. 2514 (1971), Thailand, as of June 2013. LegislationSabotage
Definition(s)
Sabotage
“Sabotage” means an act of sabotage under the law on civil defence. Source: Law of Information Energy, Act on Offences Relating to Offshore Petroleum Production Places B.E. 2530 (1987), Thailand, as of June 2013. LegislationSustained Casing Pressure
Definition(s)
Sustained casing pressure
pressure in an annulus that a) rebuilds after having been bled down; b) is not caused solely by temperature fluctuations; and c) is not a pressure that has been imposed by the well operator- Note 1 to entry: Sustained casing pressure can be present on wells without annular access.
Source: ISO 16530-1:2017, Petroleum and natural gas industries — Well integrity – Part 1: Life cycle governance, First Edition, March 2017. Global Standards