T
TAH Temperature Alarm High
TAL  Temperature Alarm Low
TALM  Taut Anchor Leg Mooring
TAWG CHRIS Technology Assessment Working Group  
TBL Through Bit Logging
TBN Total Basic Number 
TBT Tributyl étain
tcf Trillion Cubic Feet (of gas). 
TC Fund  Technical Co-operation Fund (IMO)
TCC Technical Co-operation Committee (IMO)
TCD Technical Co-operation Division (IMO)
TCDC Technical Co-operation amongst Developing Countries (IMO)
TCG Time Correction Gain
TCS  THULE Completion System
TCTP Third Country Training Programme
TCTV  Tree Cap Test Valve
TDA  Touch Down Area
TDMA  Time Division Multiple Access
TDP Touch Down Point
Tubing Desappearing Plug
TDR  Time Domain Reflectometer
TDS Temperature Depth Salinity
  Total Dissolved Solids
TDZ  Touch Down Zone
TE Threaded End
TEF  Tilt Effect Factor
TEG  Thermoelectric Generator
  Tri Ethylen Glycol 
TEI  Triton Elics Int (maker of processing imaging and mapping software suites for offshore applications) www.website
TEL  Tetraethyl Lead
TEMA Tubular Exchanger Manufacturers Association www.website
TEMPSC Totally Enclosed Motor Propelled Survival Craft
TEP  Total Exploration Production www.website
TERV Thermal Expansion Relief Valve
TFE Total Fina Elf (now TOTAL) www.website
  TetraFluoroEthylene 
TG Turbine Generator
TGA  Toxic Gas Alarm
TGD Toxic Gas Detector
TH  Tubing Hanger
THC  Total Hydrocarbon Concentration
THF  Telephone Harmocic Factor 
THRT Tubing Hanger Running Tool 
TI  Temperature Indicating function code
tk  Tank
TL Tangent Line
TLD  Tension Leg Deck
TLM  Taut Leg Mooring 
TLOF  Touch down and Lift Off area 
TLP  Tension Leg Platform 
TLV  Threshold Limit Value 
TM  Trunnion Mounted 
TMA  Thermo Mechanical Analysis 
TMCP  Thermo Mechanical Control Process
TMGB  Template Mounted Guide Base 
TMIS  Technical Management and Information System 
TML Tetramethyl Lead 
TMS Tether Management System
TMU Tie Management Unit 
TOC Total Organic Carbon
TOFD  Time Of Flight Diffraction 
TOL  Top Of Line
TOLC  Top Of Line Corrosion 
TOU Time Of Use (rates or pricing for energy)
TOVALOP  Tanker Owners Voluntary Agreement concerning Liability for Oil Pollution (ended 1997)
TP  Turning Point 
  Third Party 
TPA  Thermal Protective Aids 
TPE  Top Entry 
  ThermoPlastic Elastomeric 
TPER Total Primary Energy Requirement
TPH Total Petroleum Hydrocarbons
TPI  Total Pipeline Integrity 
TQ  Technical Queries 
TR Temporary Refuge
T/R Transformer/Rectifier
TRA  Task Risk Assessment 
TRI Total Recordable Incident
TRIR Total Recordable Incident Rate (TRI per 1 million man hours worked)
TR-SCSSV Tubing Retrievable Surface Control Sub-surface Safety Valve 
TRT  Tree Running Tool 
TS  Thermostatic 
  Tensile Strength 
TSA  Thermal Sprayed Aluminium 
  Transportation Security Administration 
TSHH  Temperature Switch High High
TSLD Trouble Shooting Loop Diagram 
TSMAD CHRIS Transfer Standard Maintenance and Application Development Working Group www.webpage
TSR  Temporary Safe Refuge
TSS  Topside Support Structure
TSV  Thermostatic Valve 
  Thermal Safety Valve 
TT  Temperature Target 
TTMS  Tendon Tension Monotoring System 
TTRD  Through Tubing Rotary Drillling 
TUP  Transfer Under Pressure 
TV Thermo Velocimetric
TVA Threat Vulnerability Analysis
TVG  Time Variant Gain 
TVP  True Vapour Pressure 
TW True Wind
TWA  Time Weighted Average 
TWh Terawatt-hour (thousand Gigawatt-hour)
TWIC  Transportation Worker Identification Credencial (USA)
TZ  Transition Zone