AC/DC Alternate Current, Direct Current AHTS Anchor Handling Towing Supply API American Petroleum Institute BG Background gas
BHA Bottom Hole Assembly BHP Bottom Hole Pressure BHT Bottom Hole temperature BJ Blast Joint
BMT Blue Methylene Test BOP Blow Out Preventer BPD Barrel Per Day BPM Barrels Per Minute BPV Back Pressure Valve BSW Base Sediment and Water BUR Build Up Rate
BWOC By Weight Of Cement BWOW By Weight Of Water C/L Control Line
CBL Cement Bond Log
CCD Centre to Centre Distance CCL Casing Collar Locator CDP Common Depth Point CET Cement Evaluation Tool CGR Condensate Gas Ratio
CMT Cement
CP Conductor Pipe CR Cement Retainer
CRA Corrosion Resistant Alloy
CSG Casing
C/T Coiled Tubing CW Current Well DC Drill Collar
DE Diatomaceous Earth DHM Down Hole Motor
DHSV Down Hole Safety Valve DIF Drill in Fluid
DLP Dog Leg Potential DLS Dog Leg Severity
D&CM Drilling & Completion Manager DOB Diesel Oil Bentonite
DOBC Diesel Oil Bentonite Cement DOR Drop Off Rate
DP Drill Pipe
DPHOT Drill Pipe Hang off Tool DRLG Drilling
DST Drill Stem Test
DV DV Collar
E/L Electric Line
ECD Equivalent Circulation Density ECP External Casing Packer EMS Electronic Multi Shot EMW Equivalent Mud Weight EOC End Of Curvature EP External Pressure
ESD Electric Shut-Down System ESP Electrical Submersible Pump ETA Expected Arrival Time ETU Endless Tubing Unit
FBHP Flowing Bottom Hole Pressure FBHT Flowing Bottom Hole Temperature FC Flow Coupling
FINS Ferranti International Navigation System FPI/BO Free Point Indicator / Back Off
FTHP Flowing Tubing Head Pressure FTHT Flowing Tubing Head Temperature GCT Guidance Continuous Tool
GLR Gas Liquid Ratio
GLS Guidelineless Landing Structure GMS Gyro Multi Shot
GOC Gas Oil Contact GOR Gas Oil Ratio GP Gravel Pack
GPM Gallon (US) per Minute GPS Global Positioning System
GR Gamma Ray
GRA Guidelines Re-Entry Assembly GSS Gyro Single Shot
HAZOP Hazard and Operability HDT High Resolution Dipmeter HHP Hydraulic Horsepower HO Hole Opener
HP/HT High Pressure - High Temperature HSI Horsepower per Square Foot HW/HWDP Heavy Weight Drill Pipe
IADC International Drilling Contractor IBOP Inside Blow Out Preventer ICGP Inside Casing Gravel Packing ID Inside Diameter
IFR Imposta Fabbricazione Ridotta IP Internal Pressure
IPR Inflow Performance Relationship JAM Joint Make-up Torque Analyser
KMW Kill Mud Weight KOP Kick Off Point
L/D Lay Down
L/S Long String
LAT Lowest Astronomical Tide LC 50 Lethal Concentration 50% LCDT Last Crystal to Dissolve oC LCM Lost Circulation Materials LCP Lower Circulation Position (GP) LEL Lower Explosive Limit
LMRP Low Marine Riser Package LN Landing Nipple
LOT Leak Off Test LQC Log Quality Control LTA Lost Time Accident LTT Lower Tell Table (GP) LWD Log While Drilling M/D Martin Decker
M/U Make Up
MAASP Max Allowable Annular Surface Pressure MD Measured Depth
MLH Mudline Hanger MLS Mudline Suspension MMS Magnetic Multi Shot
MODU Mobile Offshore Drilling Unit MOP Margin of Overpull
MPI Magnetic Particle Inspection MSCL Modular Single Completion Land MSL Mean Sea Level
MSS Magnetic Single Shot MUT Make up Torque
MW Mud Weight
MWD Measurement While Drilling N/D Nipple Down
N/U Nipple Up
NACE National Association of Corrosion Engineers NB Near Bit Stabiliser
NDT Non Destructive Test NMDC Non Magnetic Drill Collar NSG North Seeking Gyro
NTU Nephelometric Turbidity Unit OBM Oil Base Mud
OD Outside Diameter OEDP Open End Drill Pipe
OH Open Hole
OHGP Open Hole Gravel Packing OIM Offshore Installation Manager
OMW Original Mud weight ORP Origin Reference Point OWC Oil Water Contact P&A Plugged & Abandoned
P/U Pick up
PBR Polished Bore Receptacle PCG Pipe Connection Gas
PDC Polycrystalline Diamond Cutter PDM Positive Displacement Motor PGB Permanent Guide Base PI Productivity Index
PKR Packer
PLT Production Logging Tool POB Personnel On Board POOH Pull Out Of Hole PPB Pounds per Barrel PPG Pounds per Gallon ppm Part Per Million PTR Piano Tavola Rotary PV Plastic Viscosity
PVT Pressure Volume Temperature
Q Flow Rate
Q/A Q/C Quality Assurance, Quality Control
R/D Rig down
R/U Rug up
RBP Retrievable Bridge Plug RCP Reverse Circulating Position RFT Repeat Formation Test RIH Run In Hole
RJ Ring Joint
RKB Rotary Kelly Bushing ROE Radius of Exposure ROP Rate Of Penetration ROU Radios Of Uncertainty ROV Remote Operated Vehicle RPM Revolutions Per Minute RPSP Reduced Pump Strokes RT Rotary Table
S (HDT) High Resolution Dipmeter S/N Serial Number
SBHP Static Bottom Hole Pressure SBHT Static Bottom Hole Temperature SCC Stress Corrosion Cracking SD Separation Distance SDE Senior Drilling Engineer SF Safety Factor
SICP Shut-in Casing Pressure SIDPP Shut-in Drill Pipe Pressure SIMOP Simultaneous Operations SPM Stroke per Minute
SR Separation Ratio SRG Surface Readout Gyro SSC Sulphide Stress Cracking ST Steering Tool
STG Short trip gas
TCP Tubing Conveyed Perforations TD Total Depth
TFA Total Flow Area
TG Trip Gas
TGB Temporary Guide Base TOC Top of Cement
TOL Top of Liner
TVD True Vertical Depth TW Target Well
UAR Uncertainty Area Ratio UGF Universal Guide Frame UR Under Reamer
VBR Variable Bore Rams (BOP) VDL Variable Density Log VSP Velocity Seismic Profile W/L Wire Line
WBM Water Base Mud
WC Water Cut
WL Water Loss WOB Weight On Bit WOC Wait On Cement WOW Wait On Weather WP Working Pressure YP Yield Point