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Safety Alert Database and Information Exchange
Run by UK based Step Change
Further Reading



Systems Analysis and Program Development
Software company based in Germany perhaps best known for their purchasing software suite.
Further Reading


SAT - Site Acceptance Test

A test of equipment carried out at site following installation of equipment but prior to commissioning.

Further Reading



Supervisory Control and Data Acquisition - A term commonly used to describe a PC based software package that allows operator control of a process from a PC and has the PC collecting and storing process information.
Often used with PLCs.
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Safety Critical Element

Further Reading


scf - Standard Cubic Feet

Pronounced scuf - a measurement of gas e.g. 20 MMSCF/hr being 20 thousand cubic feet per hour

Further Reading



Simultaneous Drilling & Production
A technique of drilling a new well on a platform while it continues to produce oil or gas.
Further Reading


SEP - Sound Engineering Practice

PED classification whereby equipment is required to be designed and manufactured according to 'sound engineering practice'.
SEP equipment must not bear the CE mark.
Further Reading


SEPA - Scottish Environment Protection Agency

Public body responsible for the protection of the environment in Scotland.

Further Reading


SIL - Safety Integrity Level

A discrete level (1 to 4) for specifying the safety integrity requirements of the safety functions to be allocated to a loop.
SIL 4 being most onerous.
Further Reading
SIL Ratings Toolbox Page

SME - Small to Medium Enterprise

Designation given to a UK company with less than 50 employees.

Further Reading



Safety Management System

Further Reading



Southern North Sea

Further Reading



Safety of Life at Sea (SOLAS) requirements stipulate minimum equipment to be provided in liferafts.
Liferafts are provided on offshore installations, helicopters etc.
Further Reading



Statement of Requirements

Further Reading



A sour fluid is a fluid that contains hydrogen sulphide (H2S) at 10 ppm or more.

Further Reading



Solenoid Operated Valve

Further Reading


SOx - Sulphur Oxides

Sulphur oxide gases (principally Sulphur dioxide - SO2) are formed when fuel e.g. coal and oil; containing sulphur is burned.

Further Reading



To spud a well - to start the actual drilling of a well.

Further Reading


Standby Vessel

Rescue vessel that is always within 5 miles of the rig or platform.
Close standby i.e. closer than 5 miles is provided if activities on the asset increase the risk of man overboard.
Further Reading



Cobalt based alloy commonly applied as coating to valve trims to provide high resistance to wear; corrosion and high temperatures.

Further Reading


Step Change

An industry initiative to improve safety performance; awareness and behaviours throughout the UK oil and gas industry.

Further Reading



The maximum stable flow and maximum head condition for a centrifugal compressor.

Further Reading



Safety Training and Observation Programme
DuPont initiated scheme designed to create a culture of spotting potential hazards before they cause an accident.
Further Reading


STP - Standard Pressure and Temperature

STP is used in many thermodynamic calculations and tabulations and is defined as 0 degrees Celsius and 1 atmosphere of pressure.

Further Reading



The entire length of casing; tubing or drill pipe used in a drilling operation.

Further Reading



An unstable operating condition when the flow through a compressor is decreased to the point that momentary flow reversals occur.
Can lead to major damage of compressor.
Further Reading



Safe Working Load

Further Reading



Strengths; Weaknesses; Opportunities and Threats
A technique employed for analysing a competitive situation or proposal.
Further Reading


S660 - Settlement Rule

UK tax rule that aims to stop you passing income to someone else in the family or giving income or assets to someone else on the basis that you will have it back later in an effort to reduce your overall income tax bill.

Further Reading
Check Your S660 status


Single Line Diagram
A schematic diagram showing the electrical connection from the main service entrance to all of the facility’s electrical distribution panels and electrical loads.
Further Reading


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