A&G - Administrative and General ExpensesA/D - Assitant DrillerAADE- American Association of Drilling engineersAAPG - American Association of Petroleum GeologistsAAPL - American Association of Petroleum LandmenAAQS - Ambient Air Quality StandardsAAR - Automotive Accident Rate in MilesABF - Aquatic Base FlowABS - American Bureau of ShippingAC – Alternating CurrentACF - Annular Capacity FactorACHARR - Advisory Committee on Hydrocarbons Additional Recovery ResearchACHP - Advisory Council on Historic PreservationAck - AcknowledgeACOP - Approved code of practiceACT - automatic custody transferAD - Auto DrillerADIT - Accumulated Deferred Income TaxesADS - Altomatic Drilling System, NOV DrawworksAF - Arctic FloaterAFE - Approval for expenditureAFE - Approved Fixed Expense.AFFF - Aqueous film Forming foamAframax tanker - tanker < 80,000 dwt (average freight rate assessmentAFT — AfterAft - toward the stern of a ship or mobile offshore drilling rig.AHC - Active Heave CompensatorAI - artificial islandAIS - Automatic identification systemALARP - As low as reasonably possible (reduction of hazard status)AMNI - Associate Member of the Nautical InstituteAmp - AmpereAMVER - US Automated Mutual-Assistance Vessel RescueAOF - Absolute Open FlowAOSC - Association of Oilfiels Servicing ContractorsAP- Annular pressureAPCD - Air Pollution Control DistrictAPD - Application for Permit to DrillAPI - American Petroleum InstituteAPI Certified - tool that complies w/ API's standardsAPI Gravity - density of liquid petroleum productsAPL-Annular Pressure Losses APP - As Per ProgramAPR - Annular Pressure ResponseASBA - Association of Ship Brokers and AgentsASRO - Australian Shipping Registration OfficeASV - Annular Safety ValveATFN - Any Time From Now.AV - Annular VelocityAV - apparent viscosityAWD - Analysis While Drilling (part of the On Track system), Sense EDM terminologyAWO - Approval for Well Operation

B/O - Break OutB/P - bbls/dayBbbl - Billion barrelsbbl - barrel of oilBc - Bearden units of consistency, drilling fluidBC - Bridge CraneBC - BROKEN CONE drill bitBC - Code of Safe Practice for Solid Bulk CargoesBCD - Barrels per Calendar DayBcf - billion cubic feet, Production testingBcf/D - billion cubic feet per dayBcfe - Billion Cubic Feet of gas EquivalentBDI - Baltic Dry IndexBDV - Blow Down ValveBF - Buoyancy FactorBFH - Balanced Flow Hydraulics bitsBFI - Baltic Freight IndexBGWP - Base of Group Water ProtectionBHA - Bottom Hole AssemblyBHCT - bottomhole circulating temperatureBHP - Bottom Hole PressureBHST - bottomhole static temperatureBHT - bottomhole temperatureBIMCO - Baltic and International Maritime CouncilBimcosale - The Bimco standard form of bill of saleBLK - BlockedBLPD - Barrels of liquid per day Production TestingBM - benchmark, GeophysicsBMP’s - Best Management PracticesBO - Biological OpinionBOD - biochemical oxygen demand, Drilling Fluidsboe - barrel of oil equivalentboed -barrel of oil equivalent per dayBOM - Bill of MaterialsBOP - Blow-Out Preventerbopd -barrel of oil per dayBOPE - Barrels of Oil Per Day EquivalentBOPE - Blow-preventer EquipmentBOPM - Barrels of Oil Per MonthBOSIET - Basic Offshore Safety Induction and Emergency Training. includes Safety, Fire Prevention andBOSVA - British Offshore Support Vessel Owners Associationbpd - barrel per dayBPL = Bit & Nozzle Pressure Losses BPM- Back pressure manifoldBPM- barrels per minuteBPUTS - Bring Pumps Up To SpeedBPV - back pressure valveBPV Back pressure valve 2WCV when the BPV can be manipulatedBRT - Below Rotary TableBS - Bit SubBS&W- basic sediments and waterbt - Broken teethBTU - British thermal unit.BU - Balled bitBWD - Backwardbwd - barrel of water per dayBWOB - By weight of blend, drilling fluidBWOC - By weight of cementBWOW - by weight of water drilling fluidBWPD - barrels of water per day, Production TestingBYT - BIG YELLOW THING(Baker down hole motor DHM)Fire Fighting, First Aid and Hypothermia, Helicopter Safety and Escape, and Survival at Sea

C cent. - CentigradeC&K - Choke and Killc.u. - capture unitCAA - Clean Air ActCAAA - Clean Air Act AmendmentsCAAQS - California Air Quality StandardsCAD - computer assisted designCAER - Community Awareness and Emergency ResponseCAODC - Canadian Association of Oilwell Drilling ContractorsCAP - Condition Assessment Program SurveyCAPEX - Capital ExpenditureCAPP - Canadian Association of Petroleum ProducersCAR- Corrective action registerCARB - California Air Resources BoardCATS - Central Area Transmission SystemCB - Core BarrelCBHP - Constant bottomhole pressureCBHT - Circulating BH TemperatureCBI - computer-based informationCBI - Confederation of British IndustryCBL - Cement Bond LogCBM - Coalbed MethaneCBT - computer-based trainingCBT- Computer based trainingCBU - Central Business UnitCC - Circulate and Condition mudCC - Cracked cone Drill bitscc - cubic centimeterCCA - California Coastal ActCCC - California Coastal CommissionCCC - Carrier container councilCCL - Casing collar locatorCCMP - California Coastal Management ProgramCCP - Controllable Pitch PropellerCCRS - China Corporation Register of ShippingCCS - Cement Control SystemCCS - China Classification SocietyCCTV- Close circuit televisionCCW - Counter ClockwiseCD - Cone dragged BitsCDA - Common Data AccessCDP - common depth pointCDP - Comprehensive Drilling PlanCEC - California Energy CommissionCEC - cation-exchange capacity, Drilling FluidCEN - European Committee for StandardizationCENELEC - European Committee for Electro-technical StandardizationCEPA - Canadian Energy Pipeline AssociationCERCLA - Comprehensive Environmental Response, Compensation and Liability Act of 1980, drilling fluidCES - coast earth stationCESMA - Confederation of European Union Shipmasters AssociationsCET- Cement evaluation toolCf - CompareCf - Cubic Feetcfm - cubic feet per minuteCFR - Code of Federal RegulationsCfs - Cubic Feet per SecondCG - coast guardCGB- Completion guide baseCGBF - Concrete, Gravity Based StructureCGT - Capital Gains TaxCH - CatheadsCHP - Casing Hanger PressureCI - Cone interference Bits

CI - contour interval, GeologyCIRM - International radio maritime committeeCIT - Chartered Institute of TransportCITHP - Closed In Tubing Hanger PressureCIV - Chemical Injection ValveClass - Category in classification registerCLC - International Convention on Civil Liability for Oil Pollution DamageCLFP - choke line friction pressureCLTIF - Combined Lost Time Incident FrequencyCLUP - Coastal Land Use PlanCMC - carboxymethylcellulose, Drilling FluidsCMC - Crown Mounted CompensatorCMC-Hi Vis - See CMCCMC-Lo Vis - See CMCCMC-LVT - See CMCCMHEC - carboxymethyl, hydroxyethylcelluloseCMP - common midpoint, GeophysicsCMS - carboxymethyl starch, drilling fluidcmt - cementCMW - Current Mud WeightC-NET - Control Network (Profibus network)CNG - Compressed Natural GasCO - Carbon MonoxideCO2 - Carbon DioxideCOA - contract of affreightmentCoB - Center of buoyancyCOD - chemical oxygen demand, drilling fluidCOFCAW - wet combustion, Production EnhancementCoG – Center of GravityColreg - International Convention on Collision RegulationsCoM - center of MassCOMP - California Offshore Monitoring ProgramCOOGER - California Offshore Oil and Gas Energy ResourcesCOSG- Combined operations safety caseCOSHH- control of substances Hazardous to HealthCoSWP - Code of Safe Working Practices For Merchant SeamenCOW - Crude oil washingCP - Casing PressureCP - Communication ProcessorCPD - Controlled Pressure DrillingCPI - Consumer Price IndexCPMG - radio frequency pulses designed by Carr, Purcell, Meiboom and GillCPS - Cycles Per SecondCPU - Cavern Point UnitCPU - Central Processing UnitCR - Cored bitCRI - - Cutting Re-InjectionCRS - Croatian Register of ShippingCRT - cathode ray tubeCSB Casing Stabbing BasketCsF - Caesium Formatecsg - casingCSS - Code of Ship management StandardsCSS - cyclic steam stimulation. or cyclic steam injection. Heavy OilCT - Chipped teeth drill bitsCT - coiled tubing, drillingCT - Compliant TowerCT - Corporation TaxCTCO - Coiled Tubing Clean OutCTM - Coil Tubing MeasurementCTU - cargo transport unitCTU - Conductor Tensioning Unit, rig equipment listCTU is a more common acronym for Coiled Tubing Unit. allows for differentiationCUP - Conditional Use PermitCV - Curriculum Vitae (resume)

CW - ClockwiseCWA - Clean Water ActCWE - cold water equivalent CWM - Catwalk MachineCWOR - Completion Work Over RiserCZMA - Coastal Zone Management Act

D&C - Drilling and CompletionsdBA - DeciblesDC – Direct Current, eletDC - Drill Collar, DrillingDCDA - Drilling Control & Data AcquisitionDCP - Driller's Control PanelDCR – Drillers’ Control Room, rig eqipmentDD - Directional DrillerDD - Directional DrillingDDM - AKMH terminology for a Top Drive "Derrick Drilling Maching"DDU - Delivered Duty UnpaidDE – Diatomaceous Earth (filtration system for cleaning mud)DEAL - Digital Energy Atlas & LibraryDFMA – Drill Floor Manipulator ArmDGD - Dual gradient DrillingDGPS - Differential Global Positioning SystemDHSR - Degrees of Hydrate Suppression Required DHSV - Downhole Safety ValveDIS - Danish International Register of Shipping - Danish Maritime AuthorityDIS - Draft international standardDL - Development LicenceDLat - difference in latitudeDLL - Dual LateroLogDLong - difference in longitudeDLS - Dog-Leg SeverityDMDO - Distillate Marine Diesel OilDNC - Digital Nautical ChartDNV - Det Norske VeritasDO - Dissolved OxygenDO - Division OrderDOC - document of complianceDOE - US Department Of EnergyDOT - US Department of TransportationDP - Drill PipeDP - Dynamic PositioningDPDV - Dynamically-Positioned Drilling VassalDPO - Dynamic Positioning OperatorDPP - Development and Production PlanDPP - Drill Pipe PressureDR - Dead ReckoningDR - Delay RentalDRT – Drilling Riser TensionerDS - DrillshipDSC - Dangerous Goods, Solid Cargoes and ContainersDSM – Drilling Service ModuleDSPL = Drillstring Pressure Losses DSS - decision support systemDST - Drill Stem TestDSV - Diving Support VesselDSV - Drilling SuperVisorDTH _ down the holeDTI - Department of Trade and Industry (UK)DTL - Drilling to the Limit.DTS - distributed temperature sensingDTU – Dry Tree Unit

DV Tool - stage tool used for cementingDW - DrawworksDWT - Deadweight tons

E&I - Electrical and InstrumentE&P - Exploration and productionEA - Environmental AssessmentEBT - Elevated Backup TongEC - European CommissionEC - European CommunityECD - Equivalent circulating densityECDIS - Electronic Chart Display and Information SystemECGD - Exports Credits Guarantee DepartmentECITB - Engineering Construction Industry Training BoardECP - Engineered Cutter Placement, BitsECS - Electronic chart systemEEEGR - East of England Energy GroupEEZ - Exclusive economic zoneEHV - Extra High VoltageEIA - Environmental Impact AssessmentEIR - Environmental Impact ReportEIS - Environmental Impact StatementEL - Exploration LicenceElev - ElevatorsEMF - Electro Magnetic FieldsEMP - External muster pointEN - European StandardENC - electronic navigation chartEOB - End of BuildEOBM - Ester oil based mudEOFL - End of Field LifeEOR - Enhanced oil recoveryEOS - equation of state EP additive - Extreme pressure additive - used in lubricantsEPA - Environmental Protection ActEPC – Engineering, Procurement and ConstructionEPFS - Electronic Position Fixing SystemEPIRB - emergency position indicating radio beaconEPS - IMO performance standard for ECDISERD - Extended Reach DrillingERNS - Emergency Response Notification SystemEsc - EscapeESD - Emergency Shut DownESDV - Emergency shut down valveESP - Electric submersible pumpESP - Estimated Stuck PointETA - estimated time of arrivalETAP - Eastern Trough Area ProjectETD - estimated time of departureETLP – Extended Tension Leg PlatformETO - Electro-Technical OfficerETSF - Electronic Trading Standard FormatETSI - European TelecommunicationsEU - European Union

F&G - Fire and gasF/C - flow-checkFAR - Fatal accident rateFAT – Factory Acceptance TestingFB - Finger BoardFC - Filter cakeFC - Flat crested wear Drill BitFC - Float CollarFCC - fully cellular containershipFCD - Fuel control valveFCO - financed, constructed and operatedFCO - Foreign and Commonwealth OfficeFCP - Final Circulating PressureFD - Fluid DensityFDP - Final Development PlanFDS - Functional Design SpecificationFEED - Front end engineering designFERC - Federal Energy Regulatory CommissionFFM - Full Field ModelFG - Full GaugeFIT - Formation Integrity TestFIV - Formation Isolation ValveFIXED - Fixed Leg PlatformFL - Flow LineFMA - Finnish Maritime Administration, Finish Register of ShipsFNI - Fellow of The Nautical InstituteFO - fuel oilFOIP - Freedom Of Information and Protection of Privacy ActFONSI - Findings Of No Significant ImpactFOSV - Full Opening Safety ValveFP - Formation PressureFPF - Floating Production FacilityFPS - feet per secondFPS - Floating production, storageFPSO - Floating Production Storage and operationFR - Full RequirementsFRC- Fast rescue craftFrP - Friction PressureFRSB - Fast Response Spill BoatFSA - formal safety assessmentFSRU - Floating Storage and Regasification UnitFSU- Floating storage unitFT - Flow TransmitterFt - Foot (feet)FTC - US Federal Trade CommissionFTP - Flowing Tubing PlugFV - Float ValveFV - Funnel ViscosityFVF - formation volume factor FWD - ForwardsFWHP- Flowing wellhead pressureFWKO - free water knock-outFWV - Flow Wing Valve

GA - Guide ArmGal - GallonGAPP - Generally Accepted Accounting PrinciplesGBS - Gravity Based StructureGBT - Gravity Base TankGHG - Greenhouse GasesGIIP - Gas Initially In PlaceGIS - Geographic Information SystemGL - Germanischer LloydG/L - Gas/LiquiGL - Gas LiftGLM - Gas Lift MandrelGlonass - Global navigation satellite systemGLR - Gas Liquid RatioGLT - Guide Line TensionerGLV - Gas Lift ValveGMDSS - Global maritime distress and safety systemGMT - Greenwich Mean TimeGNOME - General NOAA Oil Modeling EnvironmentGOC - Gas Oil ContactGOC - General operators' certificate with regard to GMDSSGOM - Gulf of MexicoGOR - Gas Oil RatioGOSP - Gas-Oil Separation PlantGPG - Grains per gallon = ppm/17.1GPM - Gallons Per MinuteGPS - Global positioning systemGRN - gamma-ray-neutron (log)GRP - Glass Reinforced PlasticGRV - Gross Rock VolumeGT - gross tonnageGT&C - General Terms and ConditionsGTL - Gas To LiquidGTW - Gas To WireGUI - Graphical user interfaceGW - GigawattGwh - Gigawatt-HourGWI - Gross Working InterestGC - gas chromatography

H2S - Hydrogen Sulfide HAZID - Hazard identificationHazob - Hazard observationHAZOP - Hazrd and operability studyHC - Heat checking drill bit conditionHDD - horizontal directional drillingHGS - HighGravity SolidsHHP - Hydraulic Horse PowerHL - Hook LoadHLO - Helicopter Landing OfficerHLV - Heavy lift vesselHMI - Human Machine InterfaceHP - High PressureHP - Hydrostatic PressureHPHT - High-Pressure, High-TemperatureHPU – Hydraulic Power UnitHPV - hydrocarbon pore volume HR - HydraRackerHRN - AKMH Terminology for Iron Roughneck " Hydraulic Rough(N)eck"Hrs - HoursHSE - Health & Safety Executive

HSE - Health, Safety and EnvironmentHSSE - health, safety, security, and environmentHT - HydratongHTHP - High-Temperature/High-PressureHVAC - Heat, ventilation, air conditioningHVDC - High Voltage Direct CurrentHWDP - Heavy-Weight Drill Pipe

IADC - International Association of Driling ContractorsIBC - Intermediate Bulk ContainerIBOP - inside BOPICoTA - Intervention and Coiled Tubing AssosiationICP - Independant competent personICP - Initial circulating pressureICSS - Integrated Control & Safety SystemICV - Interval Control ValveID - inner diameterIDO - Technical DocumentIDU - Integrated Drilling Unit, Sense EDM terminologyIEC - International Electrical CouncilIFT - interfacial tension IMP - Internal muster pointI-NET - Information Network (Ethernet network)IOC - independent oil companyIP - Injector to Producer RatioIPC - Installed Production CapacityIPR - Inflow Performance RelationshipIRN - Iron Roughneck, Sense EDM terminologyISICP - Initial Shut-in Casing PressureITS - Influx To SurfaceIWCF - International Well Control Federaration

JAFO - Just Another Friendly ObserverJ/B - Junk Basket JD - Junk damageJU - Jack-Up JS - Junk SubJs - JoystickJB - Junction Box

KB = kelly bushingkHz - Thousand Hertz (cycles per second)KLF = Kill Line FrictionKMW - Kill mud weightKM - Kill mudKOP - Kick-Off Point KR (or KRS) - Korean Register of Shipping KRP - kill rate pressure KT = kick toleranceKV - Kilovolt KVA - Kilovolt-AmpereKVNR - Dutch Register of Shipping Kw - Kilowatt KWH - Kilowatt-Hour

L/C - Landing Collar.LACT - lease automatic custody transferLAN - Local Area NetworkLAS – Liquid Additive SystemLAT - Lowest Astronomical Tide Lat =latitude LBOP - Lower BOP (TDS or Kelly)LBP - Length between perpendiculars LBS - lifeboat stations LC - Loss CirculationLCB - longitudinal centre of buoyancy LCD - Liquid Crystal DisplayLCF - longitudinal centre of flotation LCM - Lost Circulation Material LDT - light displacement tonnage, lost during trans-shipment LED - Light emitting diode LEL - Lower explosive limit LEM - lower explosive mixture LEO - low earth orbit (satellite configuration) LER - Local equipment roomLGR - Liquid Gas Ratio LGS - LowGravity SolidsLIFT - Licence Information for Trading LIR - Local Instrument Room LKO - Lowest Known Oil LMRP - Lower Marine Riser Package LMT - local mean time LMV - Lower Master Valve LN - Land LN - Lost nozzleLNG - Liquefied Natural Gas LO - lubricating oil LOA - Length over all LOC - Letter of credit, letter of compliance (USCG) LODF - Line Outage Distribution Factor LOE - lease operating expense LOGIC - Leading Oil and Gas Industry Competitiveness LOL - limitation of owner's liability LOLE - Loss Of Load Expectation LOLER - Lifting operation, lifting equipment regulationsLOP - Line of position LOR - Letter of readiness LOS - Law of the Sea LOS - Line of sight LOT - Leak-Off Test LP - liquid petroleum LP - low pressure LPC - London Processing Centre LPG - Liquefied Petroleum Gas LR - Lloyd's Register LRDP - Long Range Development Plan Ls - Limestone LSA - Low specific activity (Radiation level) LSFO - Loss-Sulfur Fuel Oil LSH - Level Safety High LSL - Level Safety Low LST - local standard time LT - Lost teeth drill bitLTOBM - Low toxicity oil based mudLVI - Low Viscosity Index LW - low water LWD - Logging Whilst Drilling LWL - length on water lineLWSA - Lightweight Solid Additives

1. to assemble or makeup parts to form a whole2. to screw together two pieces (of pipe)3. to mix or prepare a tank of mud4. to make up for lost timeM - MeterM/U - Make up (refers to screwing pipe together)M/V - Mobile Vessel M1 - methyl orange alkalinity (of filtrate)MAASP - Maximum Allowable Annular Shut-in pressure!MAC - Manual alarm callpointMAINTOPS – Maintenance OperationsMarisat - Maritime satellite system MARPOL 73/78 - International Convention for the Prevention of Pollution from Ships MARSEC - Maritime Security MASP - Maximum Anticipated Surface PressureMAWP - Maximum Actual Working Pressure MAWP - Maximum Allowable Working Pressure MB - Mud BucketMbbls - Thousand Barrels Mbbls/d - Thousand Barrels per Day mbd - thousand barrels per daymbod - thousand barrels of oil per dayMboe - Thousand Barrels of Oil Equivalent Mboe/d - Thousand Barrels of Oil Equivalent per Day mbr - Member. distinctly identifiable sections within a given geological horizon, ie: the Suhindol mbr of the Etropol formation.MCA - Marine Coastguard Agency MCC - Master Control Center MCC – Motor Control CenterMCE - Maximum Credible Earthquakes Mcf - Thousand Cubic Feet (of gas) MCFD - Thousand Cubic Feet Per Day MCFPD - One Thousand Cubic Feet of Gas Per Day MD - Measured DepthmD - millidarcyMDL - Methane Drainage Licence MDO - Marine Diesel Oil MDRT - measured depth from rotary tableMDSS - Measured Depth Sub-SeaMDT - Modular formation Dynamic TesterMEG - Mono Ethylene GlycolMEO - medium earth orbit (for satellite configuration) MEPC - Marine Environment Protection Committee MERSAR - Merchant Ship Search and Rescue Manual MFE - Multi-flow-evaluator, form of DSTMgd - million gallons per day MGN - Marine Guidance Note MGO - Marine Gas Oil MGS - Mud Gas SeparatorMgy - million gallons per year MH - Mouse HoleMI - Machinery Interface (part of the On Track system), Sense EDM terminologyMI - Mineral Interest MIRU - Move in Rig upMIS - Management information system MISICP - Maximum Initial Shut-in Casing PressureMIYP - Maximum Internal Yield PressuremKB - Meters below Kelly BushingML - Mud lineMLLW - Mean Lower Low Water MLS - Mud Logging SystemMM - Million MM - Mitigation Measure MMbbl(s) - Million Barrels mmbd - million barrels per daymmbod - million barrels of oil per day

MMboe - Million Barrels of Oil Equivalent MMboepd (or mmboepd) - Millions of barrels of oil equivalent per day mmBtu - Million British Thermal Units MMcf - Million Cubic Feet MMcf/d - Million Cubic Feet per Day MMcfd - Million cubic feet day MMCRP - Mitigation Monitoring and Compliance Reporting Program MMP - Mitigation Monitoring Program MMPA - Marine Mammals Protection Act MMS - Minerals management service - Agency of US DoIMMscfd - million standard cubic feet per day mmstb - million stock barrelsMMstb - million stock barrels MNI - Member of the Nautical Institute MO - Mobile MODU - Mobile Offshore Drilling Unit MOL - Main oil lineMOP - Margin of Over PullMOP - mobile offshore production MOPU - Mobile Producing Unit MOTEMS - Marine Oil Terminal Engineering and Maintenance Standards MOU - Memorandum of Understanding MP - Mud PumpMPD - Managed Pressure DrillingMpd - thousand barrels per day MPN - Most Probable Number MRCC - maritime rescue coordination centre MSC - Marine Safety Committee MSDS - Materials Safety Data Sheet MSL - Mean Sea LevelMTLP - Mini Tension Leg Platform MU - has several meanings:MuSol - Mutual SolventMUX - Make Up Crossover [Crossover - X] MVA - Megavolt-Amperes MW - Megawatts MW - Mud Weight,MW1 - Mud Weight, Old mud weightMW2 - Mud Weight, New mud weightMWD – Measure While Drilling

N02 - Nitrogen dioxideN0X - Nitrogen oxides NAAQS - National Ambient Air Quality Standards NACE - national Association of Corrosion EngineersNAFTA - North American Free Trade Agreement NAPF - Non Aqueous Phase FluidNAS – National Aerospace StandardNASA - Non Active Side ArmNAVTEX - navigational and meteorological warning broadcast service NBstb - Near Bit StbeliserNCOB - no cargo on board NDT - non-destructive testing NE - Northeast NEB =National Energy Board NFI - No Further InvestmentNFPA – National Fire Prevention AssociationNFTZ - non free trade zone NG - Natural Gas NGL - Natural Gas LiquidsNGO - Non-Governmental organisation NHPV - Net Hydrocarbon Pore Volume

NI - The Nautical Institute NIHQ - Nautical Institute Headquarters, London NITC - Normal Incremental Transfer Capability NK or NKK (or ClassNK) - Nippon Kaiji Kyokai (Japan's ship classification society) NM - Nautical mile NMEA - National Marine Electronics Association NMFS - National Marine Fisheries Services (NOAA Fisheries) NMR - nuclear magnetic resonance NNR - national nature reserve NO - nitric oxide NOAA - National Marine and Atmospheric Administration NOC - national oil companyNOD - Notice of Determination NOGEPA - Netherlands Oil and Gas Exploration and Production Association NOI - Notice Of Inquiry NOI - Notice Of Intent NOP - Notice of Preparation NOR - Notice of Readiness NOV - National Oilwell VarcoNP - Neutral PointNPD - Norwegian Petroleum Directorate NPDES - National Pollutant Discharge Elimination System NPREP - National Preparedness for Response Exercise Program NPSH - Net Positive Suction HeadNPT - Non Productive TimeNPV - Net Present ValueNPV - Net Present Value NRC - National Response Center NRI - Net Revenue Interest NRV - Non Return ValveNSA - Norwegian Shipowners' Association NSDG - North Sea Decommissioning Group NT - net tonnage NTHF - Non-Toxic High FlashNTO - National Training Organization NTU - Nephelometric Turbidity UnitNUMAST - National Union of Marine, Aviation & Shipping Transport Officers NWI - Net Working Interest NYMEX - New York Mercantile Exchange

O/B - on board O/R - OverrideOBM - Oil-Based MudOBO - ore/bulk/oil carrier OC - Off centre wear Drill bitOCA - Offshore Contractors Association OCIMF - Oil Companies International Marine Forum OCR - optical character recognition OCS - Outer Continental ShelfOCSLA - Outer Continental Shelf Lands Act OCTG - Oil Country Tubular GoodsOD - Outer Diameter ODBC - Open Data Base ConnectivityODT - Oil Down ToOECD - Organization for Economic Cooperation and Development OES - Office of Emergency Services OFE - Owner Furnished (delivered) EquipmentOFS - Owner Furnished ServicesOG - Oil and Gas Directorate

OGITF - Oil & Gas Industry Task Force OGML - Oil, Gas and Mineral Lease OIAC - Oil Industry Advisory Committee OIIP - oil originally in-placeOIM - Offshore Installation ManagerOIP - oil in-placeOiW - oil-in-water - emulsionOLF - Norwegian Oil Industry Association OLM - Optical Link ModuleOMBO - One Man Bridge Operation OMW - Original Mud WeightOOC - Oil on CuttingsOOD - Officer of the deck OOE - Offshore Operation EngineerOOIP - oil originally in placeOOW - Officer of the watch OPA 90 - US Oil Pollution Act of 1990 OPEC - Organisation of Petroleum Exporting Countries OPEX - Operating Expenditure OPITO - Offshore Petroleum Industry Training Organization OPITO - The Oil & Gas Academy OPPR - oil pollution preparedness and response OPR - Office of Planning and Research OPRC - International Convention on Oil Pollution Preparedness, Response and Co-operation OPS - US Office of Pipeline Safety ORRI - Overriding Royalty Interest OS - operating system OSC - Operations safety caseOSCP - Oil Spill Contingency Plan OSDD - Oilfield Services Data Dictionary OSHA - Occupational Safety and Health Administration OSPAR - Oslo & Paris Convention for the Protection of the Marine Environment of North East Atlantic OSPR - Oil Spill Prevention and Response OSRA - Oil Spill Risk Analysis OSRP - Oil Spill Response Plan OSRV - Oil Spill Response Vessel OSV - Offshore Support Vessel OTL - Operations Team LeaderOTO - Oil Taxation Office (of the Inland Revenue) OWC - Oil Water Contact

p - PushP&A - Plugged and AbandonedP&I (or P and I) - Protection and Indemnity clubP&ID - Process and Instrumentation drawingp.u. - porosity unitp+c - Push and ConfirmP2 - Double PushPA - public addressPAC - Pacific OCS Region PAH - poly-aromatic hydrocarbons Panamax - Ships able to transit, and allowed transit, of the Panama Canal PAPA - Prepare to Abandon Platform AlarmPB - Pinched bitPBL Sub - Paul Bryant LeePBR - Polished Bore Receptacle PBTD - Plug Back Total DepthPBU - Pressure Build UpPCV - Pressure control valvePDC - Polycrystalline Diamond CompositePDC log - perforating depth control (log)PDG - Permanent Downhole Gauge

PE - Petroleum Engineer PEDL - Petroleum Exploration & Development Licence Pf - phenolphthalein alkalinityPF - Platform PFD - position fixing device, personal floatation device PFEER - Prevention of Fire and Explosion and Emergency Response RegulationsPG - Pressure GradientPGB - Permanent Guide BasePGOR - Produced Gas Oil RatioPGOR - Produced Gas Oil Ratio Ph - indicator of alkalinity & acidityPH - Pipe Handlerph - Push and HoldPHC - Pipehandling Crane, Sense EDM terminologyPHR – Pipe Handler Control RoomPHS - Tubular Handling System, Sense EDM terminologyPI - productivity index PIANC - Permanent International Association of Navigation Congresses PILOT - OGITF Successor PIMS - Pipeline Integrity Management SystemPINC - Potential Incident of Non-Compliance

PJSM – Pre Job Safety MeetingPLB - personal locator beacon PLC - Process Logic ControllerPLC – Programmable Logic ControllerPLEM - pipeline end manifold PLT - Pod Line TensionerPLT - Production Logging ToolPLT - Production Logging Tool PM - particulate matter Pm - phenolphthalein alkalinityPM10 - particulate matter less than 10 microns in diameter PM2.5 - particulate matter less than 2.5 microns in diameter PMCD - Pressurized mud-cap DrillingPMR - Planned Maintenance RoutinePMS - planned maintenance system PN - Plugged nozzle Drill bitPOB - persons on board POB - pilot on board POBM - Pseudo-Oil-Based MudPON - Petroleum Operations Notice POOH - Pull Out Of Hole POOI - Pacific Operators Offshore IncorporatedPOSVCM - Pipeline Oil Spill Volume Computer Model POV - Pressure Operated Valves PP - Pore Pressureppa - pounds of proppant addedPPB - parts per billion ppcf - Pounds Per Cubic FootPPE - Personnel Protection Equipment PPG - Pounds per gallon ppg – Pounds per Gallon (density)ppm - Parts per millionpptf - Pounds Per Thousand FeetPRS - Polish Register of Shipping PRS- Pipe Racking System

PRT - Petroleum Revenue Tax PRT – Production Riser TensionerPS - Power SwivelPSA - pressure setting assemblyPSAC - Petroleum Services Association of Canada PSC - port state control PSC - Production Sharing ContractPSD - Planned Shut-DownPSD - Prevention of Significant Deterioration PSD - Process Shut DownPSE - Pressure Safety Element PSH - Pressure Safety High PSHL - Pressure Safety High/Low psi - pounds per square inchpsi/ft - pressure gradientPSIA - Pounds per Square Inch Atmospheri…PSIG - Points per square inch, gauge psig - pounds per square inch gaugePSL - Pressure Safety Low PSL - Product Specification LevelPSU - Power supply unitPSV - Pressure safety valvePTO - Permit to Operate PTW - Permit to WorkPUE - Pick Up ElevatorPUR - Plant Upset ReportPUWER - Provision and Use of Work Equipment Regulations PV - Plastic ViscosityPV - pore volumePV - pressure/vacuum PVT - Pit Volume Totalizer (Mud System)PVT - pressure-volume-temperaturePW - Potable waterPW - Produced WaterPWD - Pressure(monitoring) While DrillingPWRI - Produced Water Re-Injection PWV - Production Wing Valve

QA - quality assuranceQC - quality controlQF - Qualifying Facility QRA - Quantative risk analysis

R&D - Research and DevelopmentR/U - Rig upRA - Radio activityRabbit - Piston that pushes core out of core tube. pumped out with water.RAD - radioactive densiometerRB - Rotary BusingRCC - Rescue coordination centre RCCD - Reverse Circulation Centre Discharge RCDS - Raster Chart Display Systems RCJB - Reverce circulating junk basket.RCM – Recirculating MixerRD - Rig Down

RDF - Radio direction finder RDRL - RedrillRE - Reservoir EngineerRe - reynolds number - hydraulicsRENC - Regional Electronic Navigational Chart Coordinating Centre REV - ReverseRF - radio frequency RF - range finderRFMA – Rig Floor Mechanical ArmRFT - Repeat Formation TesterRG - Rounded gauge Drill BitRH - Relative HumidityRH - Right HandRI - Royalty Interest Rig – All drilling systems required to drill, complete, or workover production or injection wellsRIH - Run In HoleRINA - Registro Italiano Navale (Italian Register of Shipping) RIRs - Risk Identification ReportsRIT - Riser TensionerRKB - Rotary Kelly BushingRMA - Rock mechanics algorithmRMLC - Request for Mineral Land Clearanc…RMS - Ratcheting Mule ShoeRMT - National Union of Rail, Maritime and Transport Workers RN - RoughneckRNC - Raster Navigational Chart RNR - Romanian Maritime Register of Shipping ROA - Return of Assets ROB - remain on board (cargo, bunkers) ROC - Reactive Organic Compounds ROE - Return of Equity ROFR - Right Of First Refusal ROG - Reactive Organic Gases ROI - Return On Investment ROP - rate of penetrationRo-Ro - roll on/roll off ROS - residual oil saturation ROSF - Rincon Onshore Separation Facility ROV - Remotely Operated Vehicle ROW - Right of way RPM - Revolutions Per Minute RPM - Rounds Per MinuteRR - Rig ReleasedRS - Rig ServiceRS - Russian Maritime Register of Shipping RST - Rotary Support TableRT - rotary tableRT (or R/T) - radio telegraphRTCM - Radio Technical Commission for Maritime Services RTTS - Retrievable Test-Treat-SqueezeRTU - Remote Terminal Unit RWPs - remedial work plansRWQCB - Regional Water Quality Control Board

R&D - Research and DevelopmentR/U - Rig up

RA - Radio activityRabbit - Piston that pushes core out of core tube. pumped out with water.RAD - radioactive densiometerRB - Rotary BusingRCC - Rescue coordination centre RCCD - Reverse Circulation Centre Discharge RCDS - Raster Chart Display Systems RCJB - Reverce circulating junk basket.RCM – Recirculating MixerRD - Rig DownRDF - Radio direction finder RDRL - RedrillRE - Reservoir EngineerRe - reynolds number - hydraulicsRENC - Regional Electronic Navigational Chart Coordinating Centre REV - ReverseRF - radio frequency RF - range finderRFMA – Rig Floor Mechanical ArmRFT - Repeat Formation TesterRG - Rounded gauge Drill BitRH - Relative HumidityRH - Right HandRI - Royalty Interest Rig – All drilling systems required to drill, complete, or workover production or injection wellsRIH - Run In HoleRINA - Registro Italiano Navale (Italian Register of Shipping) RIRs - Risk Identification ReportsRIT - Riser TensionerRKB - Rotary Kelly BushingRMA - Rock mechanics algorithmRMLC - Request for Mineral Land Clearanc…RMS - Ratcheting Mule ShoeRMT - National Union of Rail, Maritime and Transport Workers RN - RoughneckRNC - Raster Navigational Chart RNR - Romanian Maritime Register of Shipping ROA - Return of Assets ROB - remain on board (cargo, bunkers) ROC - Reactive Organic Compounds ROE - Return of Equity ROFR - Right Of First Refusal ROG - Reactive Organic Gases ROI - Return On Investment ROP - rate of penetrationRo-Ro - roll on/roll off ROS - residual oil saturation ROSF - Rincon Onshore Separation Facility ROV - Remotely Operated Vehicle ROW - Right of way RPM - Revolutions Per Minute RPM - Rounds Per MinuteRR - Rig ReleasedRS - Rig ServiceRS - Russian Maritime Register of Shipping RST - Rotary Support TableRT - rotary table

RT (or R/T) - radio telegraphRTCM - Radio Technical Commission for Maritime Services RTTS - Retrievable Test-Treat-SqueezeRTU - Remote Terminal Unit RWPs - remedial work plansRWQCB - Regional Water Quality Control Board

TA - temporary abandonmentTAC - Toxic Air ContaminantsTAR - True Amplitude RecoveryTB - Tank BatteryTBA - To Be Advisedtbg - TubingTBOSIET - Tropical Basic Offshore Safety Induction & Emergency Training Tcf - Trillion Cubic Feet TCF-Temp correlation factor, gas liftTCP- Tri Crecyl Phosphate - defoamerTCP- Tubing Conveyaed Perforating gunTCR - Transition Cost Recovery TCT- True Crystallization tempTD - Target DepthTD - Total Depth TDPH - Top Drive Pipe HandlerTDS - Top Drive SystemTDS - total dissolved solids TDU - Transmission Dependent Utility TEU - Twenty feet equivalent unit TF - Tropical fresh load line TFCB - Trip for Changing BitTFL - through-flowline (equipment)TFM - AKMH Terminology for Pipe Skate " Tubular Feeding Machine"TGB - Temporary Guide BaseTGOR - Total Gas Oil RatioTGOR - Total Gas Oil Ratio THF - Tubing Hanger FlangeTHP - Tubing Hanger Pressure THS - Tubing Head SpoolTIH - Trip In HoleTIMS - Technical Information Management System TJ - tool jointTLL - timber load line TLP - Tension Leg Platform TM - ton milesTOC - Top Of CementTOF - Top Of FishTOL - Top Of LinerTOOH - Trip Out Of HoleTOU - Time-Of-Use TP - Touch PadTPI - Tones per inch immersion TPIC - Terminal Person in Charge TQM - Total quality management TR - Temporary RefugeTR - Tracking Drill bitTRIF - Total Recordable Incident FrequencyTRSCSSSV - Tubing Retrievable Surface Controlled Sub-Surface Safety Valve

TRSV- Tubing Retrievable Standing ValveTSE - Temperature Safety Element TSH - Temperature Safety High TSS’s - Traffic Separation Schemes TT - Trip Tank TTC - Total Transfer Capability TTRD - Through Tubing Rotary Drilling TVD - True Vertical DepthTVDSS - True Vertical Depth Sub Sea

UBD - under balanced drillingUBOP - Upper BOP (TDS or Kelly)UBS - Universal bulk ship UEL - Upper explosive limit UFC - Uniform Fire Code UFL - Upper flammable limit UHF – Ultra High Frequency (radio system)UKCS - United Kingdom Continental Shelf UKLPG - Industry association formed from the LP Gas Association (LPGA) and the Association for Liquid Gas & Equipment Distributors (ALGED) UKOOA - United Kingdom Offshore Operator assosiationUKPIA - United Kingdom Petroleum Industry Association Limited ULBC - ultra large bulk carrier ULCC - ultra large crude carrier UMS - Universal Measurement System UMV - Upper Master ValveUN - United Nations UNCLOS - United Nations Convention on the Law of the Sea UPS – Uninterruptible Power SupplyUR - underreamUSC - United States CodeUG - Under GaugeUSCG – United States Coast GuardUSDA - US Department of Agriculture USDOI - US Department of Interior USDOT - US Department of Transportation USEPA - US Environmental Protection Agency USFWS - US Fish and Wildlife Service USGS - US Geological Survey UTA - Umbilical Termination AssemblyUTC - Universal time (coordinated) UV - ultra-violet

VBR - Variable Bore Rams VDL - Variable Deck Load VDU – Visual Display UnitVFD – Variable Frequency DriveV-G meter = viscosity get meter VHF – Very High Frequency (radio system)VIR - Value Investment RatioVRR - Voidage Replacement Ratio VSC - variable speed controller

W/C - Well CentreWACOG - Weighted Average Cost Of GasWAG - Water-Alternating GasWBM - Water-Based Mud

WC - WatercutWC = Water cushionWCD - Worst-case dischargeWDP - Waste Discharge PermitWDR’s - Waste discharge requirementsWE - Well EngineerWEG - Wireline Entry GuideWEND - World Electronic Navigation DatabaseWHM - Wellhead maintenanceWHO - World Health OrganisationWHP - Wellhead PressureWHRU - Waste Heat Recovery UnitWI - Water InjectionWI - Working InterestsWIS - Wave Information StudyWITS - Well site Information Transfer StandardWITSML - Well site Information Transfer Standard, Markup LanguageWL - water lineWL - Water Loss, drilling fluidWL = wirelineWLEG- Wireline Entry Guide aka RE-GuideWLL - WireLine LoggingWMO - World Meteorological OrganizationWMU - World Maritime UniversityWO - Weld wash out Drill Bit DamageWOB - Weight on BitWOC - Wait on CementWOC - water/oil contactWOE - Well Operations EngineerWOG = wait on geologistWOG = Water-oil-gasWOO = waiting on ordersWOR - water/oil ratio WOW = waiting on weatherWP - Well ProtectorWPI - Wholesale Price IndexWQC - Water Quality CertificateWRSCSSV - Wireline Retrievable Surface Controlled Sub-Surface ValveWRSV- Wireline Retrievable Safety ValveWSCA - Well Services Contractors AssociationWSS - Well Services SupervisorWT - watertightwT - Worn teeth drill bit damageWTI - West Texas IntermediateWTP - Willingness to PayWWS- Water well source completion aka WSW Water Source Well CompletionWY - Water Year

Xb - X-Bushing X-COM - Multi Purpose Control Module, Sense EDM terminology XMT - XMas Tree XO - Cross-Over

YP - yield point YS - Yield strength YV - yield value

Z- - acoustic impediance. production loggingZnCl2 - zinc chloride. ZMS - Zone Management Systems