A – B – C – D – E – F – G – H – I – J – K – L – M – N – O – P – R – S – T – U – V – W – X
| PCKR | Packer |
| PAL | Palaeo Chart |
| PEA | Palaeo Environment Study Report |
| PALYN | Palynological Analysis Report |
| PSD | Particle size distribution |
| PM | Particulate matter |
| ppb | Parts per billion |
| ppm | Parts per million |
| ppt | Parts per thousand |
| PBD | Pason Billing System |
| PAM | Passive acoustic monitoring |
| PHC | Passive Heave Compensator |
| PDKR | PDK 100 Report |
| PDKL | PDK Log |
| PENL | Penetration Log |
| PE | Pensacola Gulf of Mexico leasing area |
| PEP | PEP Log |
| PFC | Perfluorocarbon |
| PCOLL | Perforation and Collar |
| PCCL | Perforation Casing Collar Locator Log |
| PDC | Perforation Depth Control |
| PERDC | Perforation Depth Control |
| PERFO | Perforation Log |
| PFPG | Perforation Plug Log |
| PREC | Perforation Record |
| PFREC | Perforation Record Log |
| PDG/PDHG | Permanent Downhole Gauge |
| PGB | Permanent Guide Base |
| POF | Permanent Operations Facility |
| k | Permeability |
| PERM | Permeability |
| PERML | Permeability Log |
| kh | permeability thickness (k = permeability, h = height) |
| PEL | Permissible exposure limit |
| PTO | Permit to Operate |
| PTW | Permit to Work |
| PIC | Person in charge |
| PPE | Personal protective equipment |
| POB | Personnel on Board |
| PJ | Petajoule |
| PETD | Petrographic Data Log |
| PETA | Petrographical Analysis Report |
| PETPM | Petrography Permeametry Report |
| PEMEX | Petroleos Mexicanos SA |
| PE | Petroleum Engineer |
| PESA | Petroleum Equipment Suppliers Association |
| PEDL | Petroleum Exploration and Development Licence (United Kingdom), introduced in the 8th Onshore Licensing Round |
| PESGB | Petroleum Exploration Society of Great Britain |
| PON | Petroleum Operations Notice (United Kingdom) |
| PTTC | Petroleum Technology Transfer Council, United States |
| PETLG | Petrophysical Evaluation Log |
| PETRP | Petrophysical Evaluation Report |
| PFC | PFC Log |
| PH | Phasor Log |
| PHASE | Phasor Processing Log |
| PHOL | Photon Log |
| PHYFM | Physical Formation Log |
| PU | Pick Up (drill pipe, bha, tubing, rods, power swivel, etc.) |
| PIP | Pipe in Pipe |
| PSR | Pipe slip ram |
| PSV | Pipe Supply Vessel |
| PLSV | Pipelay Support Vessel |
| PL | Pipeline |
| PLEM | Pipeline End Manifold |
| PLET | Pipeline End Termination |
| PRCI | Pipeline Research Council International, Inc. |
| PTA/S | Pipeline Termination Assembly/Structure |
| P&ID | Piping and Instrument diagrams |
| POE | Plan of exploration |
| PSD | Planned Shut-Down |
| PUR | Plant Upset Report |
| PV | Plastic viscosity |
| PFHE | Plate Fin Heat Exchanger |
| PFE | Plate/Frame Heat Exchanger |
| PEX | Platform Express toolstring (resistivity, porosity, imaging) |
| PHPU | Platform Hydraulic Power Unit |
| PBDMS | Playback DMSLS Log |
| P&A | Plug and abandon |
| PBTD | Plug Back Total Depth |
| PLG | Plug Log |
| PSQ | Plug Squeeze Log |
| PBR | Polished bore receptacle |
| PCB | Poly Chlorinated BiPhenyl |
| PA | Polyamide |
| PDC | Polycrystalline Diamond Compact (a type of drilling bit) |
| PAH | Polycyclic aromatic hydrocarbon |
| PE | Polyethylene |
| PE | Polyethylene |
| PVC | Polyvinyl chloride |
| PVDF | Polyvinylidene Fluoride |
| PP | Pore pressure |
| PV | Pore volume |
| Phi | Porosity |
| PI | Port Isabel Gulf of Mexico leasing area |
| PBS | Ported bypass sub |
| PLS | Position Location System |
| PDM | Positive Displacement Motor |
| PMI | Positive Material Identification |
| POSFR | Post Fracture Report |
| PPI | Post Pipelay Installation |
| PPI | Post Production Inspection/Intervention |
| PWHT | Post Weld Heat Treat |
| POSTW | Post Well Appraisal Report |
| POSWE | Post Well Summary Report |
| PINC | Potential incident of noncompliance |
| pptf | Pounds (per square inch) Per Thousand Feet (of depth) |
| lbf | pounds force |
| lbm | pounds mass |
| PPA | Pounds of proppant added |
| ppcf | Pounds Per Cubic Foot |
| ppg | Pounds Per Gallon |
| psi | Pounds per square inch |
| PSIA | Pounds Per Square Inch Atmospheric |
| PSIG | Pounds Per Square Inch Gauge |
| PCDM | Power and Control Distribution Module |
| PDPM | Power Distribution Protection Module |
| PAR | Pre-Assembled Rack |
| PAU | Pre-Assembled Unit |
| PPE | Preferred Pressure End |
| B or b | prefix denoting a number in billions |
| MM or mm | prefix designating a number in millions (or SI unit |
| M or m | prefix designating a number in thousands (not to be confused with SI prefix M for mega- or m for milli) |
| PHB | Pre-Hydrated Bentonite |
| P | Pressure |
| PSANA | Pressure Analysis |
| PADPRT | Pressure Assisted Drillpipe Running Tool |
| PBU | Pressure Build Up (applies to integrity testing on valves) |
| PCV | Pressure control valve |
| PVC | Pressure control valve |
| PDR | Pressure differential ratio |
| PSVAL | Pressure Evaluation Log |
| PG | Pressure Gauge (Report) |
| PRSRE | Pressure Gauge Report |
| PI | Pressure indicator |
| PIT | pressure integrity test |
| PSLOG | Pressure Log |
| PRESS | Pressure Report |
| PSE | Pressure safety element |
| PSH | Pressure safety high (sensor) |
| PSHL | Pressure safety high low |
| PSL | Pressure safety low (sensor) |
| PSV | Pressure safety valve |
| PSV | Pressure Safety Valve |
| PVSV | Pressure vacuum safety valves |
| PVT | Pressure Volume Temperature |
| PVTRE | Pressure Volume Temperature Report |
| PSR | Pre-startup review |
| PSD | Prevention of significant deterioration |
| P/E | Price to earnings (ratio) |
| PRA | Probabilistic risk assessment |
| PQR | Procedure qualification record |
| PFD | Process flow diagrams |
| PHA | Process hazards analysis |
| PSM | Process safety management |
| PGOR | Produced Gas Oil Ratio |
| PW | Produced Water |
| PWRI | Produced Water Re-Injection |
| PA | Producing Asset |
| PA | Producing Asset with Exploration Potential |
| P | Producing well (as opposed to NP |
| PSL | Product service line |
| PSL | Product specification level |
| PSL | Product Specification Level |
| PCA | Production Concession Agreement |
| PINTL | Production Interpretation |
| PL | Production Licence |
| PROD | Production Log |
| PLT | Production logging tool |
| PLTQ | Production Logging Tool Quicklook Log |
| PLTRE | Production Logging Tool Report |
| PPS | Production Packer Setting |
| PRA | Production Reporting & Allocation |
| PSA | Production Service Agreement |
| PSC | Production Sharing Contract |
| PROTE | Production Test Report |
| PTSET | Production Test Setter |
| PWB | Production Wing Block (XT) |
| PWV | Production Wing Valve (also known as a flow wing valve on a Xmas tree) |
| PSC | Production-sharing contract |
| PI | Productivity index |
| P&L | Profit and loss |
| PART | Program Assessment Rating Tool |
| PLC | Programmable logic controller |
| PCP | Progressive cavity pump |
| PM | Project management |
| C3 | propane |
| PBHL | Proposed Bottom Hole Location |
| PSO | Protected species observer |
| PDNP | Proved Developed Not Producing |
| PDP | Proved Developed Reserves |
| PNP | Proved Not Producing |
| PUD | Proved Undeveloped Reserves |
| 3P | Proved, probable, and possible reserves |
| PUWER | Provision and Use of Work Equipment Regulations |
| PROX | Proximity Log |
| POBM | Pseudo-Oil-Based Mud |
| PSP | Pseudostatic Spontaneous Potential |
| PSPL | PSP Leak Detection Log |
| PST | PST Log |
| PAGA | Public Address General Alarm |
| PLC | Public limited company |
| POOH | Pull out of hole |
| POOH / POH | Pull Out Of Hole |
| PR | Pully Ridge Gulf of Mexico leasing area |
| POF | Pump open force. Used in drilling jar hydraulic calculations. |
| PP | Pump Pressure |
| PU | Pumping unit |
| PUN | Puncher Log |