A – B – C – D – E – F – G – H – I – J – K – L – M – N – O – P – R – S – T – U – V – W – X
| RFID | Radio-frequency identification |
| RK | Rankin Gulf of Mexico leasing area |
| RMS | Ratcheting Mule Shoe |
| ROP | Rate of Perforation |
| RAC | Ratio Curves |
| TV/BIP | Ratio of Total Volume (ore and overburden) to Bitumen In Place |
| RAWS | Raw Stacks VSP Log |
| RFLNG | Ready for Liquefied Natural Gas |
| RFSU | Ready For Start-Up |
| RT | Real time |
| RWD | Reaming While Drilling |
| REL | Recommended exposure limit |
| RP | Recommended practice |
| API RP 96 | Recommended Practice for Deepwater Well Design and Construction |
| API RP 14J | Recommended Practice for Design and Hazards Analysis for Offshore Production Facilities |
| API RP 75 | Recommended Practice for Development of a Safety and Environmental Management Program for Offshore Operations and Facilities (3rd ed., May 2004, affirmed 2008) |
| API RP 7G | Recommended Practice for Drill Stem Design and Operating Limits |
| API RP 49 | Recommended Practice for Drilling and Well Servicing Operations Involving Hydrogen Sulfide |
| API RP 14G | Recommended Practice for Fire Prevention and Control on Open Type Offshore Production Platforms |
| API RP 2D | Recommended Practice for Operation and Maintenance of Offshore Cranes |
| API RP T-1 | Recommended Practice for Orientation Program for Personnel Going Offshore for the First Time |
| API RP T-2 | Recommended Practice for Qualification Programs for Offshore Production Personnel Who Work With Anti-Pollution Safety Devices |
| API RP T-6 | Recommended Practice for Training and Qualifications of Personnel in Well Control Equipment and Techniques for Completion and Workover Operations on Offshore Locations Recommended Practices for Well Control Operations |
| API RP T-4 | Recommended Practice for Training of Offshore Personnel in Non-Operating Emergencies |
| API RP T-7 | Recommended Practice for Training of Personnel in Rescue of Persons in Water |
| API RP 55 | Recommended Practices for Oil and Gas Producing and Gas Processing Plant Operations Involving Hydrogen Sulfide |
| API RP 59 | Recommended Practices for Well Control Operations |
| RIR | Recordable incident rate |
| R&D | Records and documentation |
| ROZ | Recoverable Oil Zone |
| RF | Recovery Factor |
| R&M | Refining and marketing rate |
| RRT | Regional response team |
| RSFO | Regional Supervisor, Office of Field Operations, for BSEE |
| REACH | Registration, Evaluation, Authorization, and Restriction of Chemicals |
| RT | Regular time |
| RVP | Reid vapor pressure |
| RN | Release notes |
| RCM | Reliability Centred Maintenance |
| RAM | Reliability, Availability, and Maintainability |
| RBW | Remaining body wall |
| RCR | Remote Component Replacement (Tool) |
| RCU | Remote Control Unit |
| ROT | Remote Operated Tool |
| ROWS | Remote Operator Workstation |
| ROV | Remotely Operated Vehicle |
| REZ | Renewable Energy Zone (United Kingdom) |
| REOR | Reorientation Log |
| RFMTS | Repeat Formation Tester |
| RFT | Repeat Formation Tester |
| RFTRE | Repeat Formation Tester Report |
| RFTS | Repeat Formation Tester Sample |
| RE-PE | Re-Perforation Report |
| RIK | Replacement in kind |
| RQ | Reportable quantity |
| RFI | Request for interest |
| RMLC | Request for Mineral Land Clearance |
| RFP | Request for proposal |
| RFI | Requests for inspection |
| R&D | Research and development |
| RESAN | Reservoir Analysis |
| RCI | Reservoir Characterization Instrument |
| RE | Reservoir Engineer |
| RESEV | Reservoir Evaluation |
| REWL | Reservoir Evaluation – Wireline |
| RESFL | Reservoir Fluid |
| RESL | Reservoir Log |
| RMP | Reservoir Management Plan |
| RST | Reservoir Saturation Tool (Schlumberger) Log |
| RESOI | Residual Oil |
| RESI | Resistivity Log |
| RACI | Responsible / Accountable / Consulted / Informed |
| RCL | Retainer Correlation Log |
| RBP | Retrievable Bridge Plug |
| RTTS | Retrievable Test-Treat-Squeeze (packer) |
| ROCE | Return on capital employed |
| ROIC | Return on invested capital |
| ROI | Return on investment |
| RPD | Revised application for permit to drill |
| RPM | Revised application for permit to modify |
| RPM | Revolutions Per Minute, (Rotations Per Minute) |
| RCKST | Rig Checkshot |
| RDMO | Rig Down Move Out |
| RIGMO | Rig Move |
| RSTC | Rig safety training coordinator |
| RSS | Rig Site Survey |
| ROW | Right of way |
| RUE | Right-of-use and easement |
| RMC | Rigid metal conduit |
| RPCM | Ring Pair Corrosion Monitoring |
| RESDV | Riser Emergency Shut Down Valve |
| RITT | Riser Insertion Tube (Tool) |
| RIMS | Riser Integrity Monitoring System |
| RMS | Riser Monitoring System |
| AS/NZS 4360 | Risk management (a publication of Standards Australia) |
| ISO 31010 | Risk Management Risk Assessment Techniques |
| RBD | Risk-based design |
| RBI | Risk-based inspection |
| RNT | RNT Log |
| RLOF | Rock Load-out Facility |
| R&R | Roles and responsibilities |
| RCA | Root Cause Analysis |
| ROCT | Rotary Coring Tool |
| RKB | Rotary Kelly Bushing (a datum for measuring depth in an oil well) |
| RSS | Rotary Steerable Systems |
| RT | Rotary table |
| RCD | Rotating Control Device |
| RROCK | Routine Rock Properties Report |
| RDS | Royal Dutch/Shell |
| RIH | Run in hole |