A – B – C – D – E – F – G – H – I – J – K – L – M – N – O – P – R – S – T – U – V – W – X
| DTI | UK Department of Trade and Industry |
| UKOCS | UK outer continental shelf |
| UWA | Ultimate work authority |
| URR | Ultimately recoverable resources |
| UBI | Ultrasonic Borehole Imager |
| UBIRE | Ultrasonic Borehole Imager Report |
| USIT | Ultrasonic imaging tool (cement bond logging) |
| UT | Ultrasonic testing |
| UWT | Ultrasonic welding line |
| UV | Ultraviolet |
| UCH | Umbilical Connection Housing |
| UMCA | Umbilical Midline Connection Assembly |
| UTA/B | Umbilical Termination Assembly/Box |
| ULCGR | Uncompressed LDC CNL Gamma Ray Log |
| UCS | Unconfined compressive strength |
| UB | Underbalanced |
| UBD | Underbalanced drilling |
| UIC | Underground Injection Control |
| UWILD | Underwater Inspection in Lieu of Dry Docking |
| USV | Underwater safety valve |
| UWI | Unique Well Identifier |
| UKCS | United Kingdom Continental Shelf |
| UKOOA | United Kingdom Offshore Operators Association |
| UKOOG | United Kingdom Onshore Operators Group |
| UN | United Nations |
| USC | United States Code |
| USGS | United States Geological Survey |
| UBHO | Universal Bottom Hole Orientation (sub) |
| UGF | Universal Guide Frame |
| URT | Universal Running Tool |
| UTM | Universal Transverse Mercator |
| UPB | Unmanned Production Buoy |
| UOT | Unscheduled overtime |
| UEL | Upper explosive limit |
| UFL | Upper flammable limit |
| UFJ | Upper Flex Joint |
| UMV | Upper Master Valve (from a Xmas tree) |
| UPR | Upper Pipe Ram |
| UCSU | Upstream Commissioning and Start-Up |
| BLM | US Bureau of Land Management |
| BSEE | US Bureau of Safety and Environmental Enforcement,created by splitting BOEMRE into two parts, BOEM and BSEE, as of Oct. 1, 2011. |
| USCG | US Coast Guard |
| CZMA | US Coastal Zone Management Act |
| CERCLA | US Comprehensive Environmental Response Compensation and Liability Act |
| DWRRA | US Deep Water Royalty Relief Act |
| DOE | US Department of Energy |
| DOI | US Department of Interior |
| DOL | US Department of Labor |
| DOT | US Department of Transportation |
| PHMSA | US Department of Transportation Pipeline and Hazardous Materials Safety Administration |
| eWell | US Electronic Well Permitting and Reporting System |
| ESA | US Endangered Species Act |
| EIA | US Energy Information Administration |
| EPA | US Environmental Protection Agency |
| EEZ | US Exclusive Economic Zone |
| FERC | US Federal Energy Regulatory Commission |
| FR | US Federal Register |
| USFWS | US Fish & Wildlife Service |
| BSEE-0123 | US Form for Application for Permit to Drill |
| BSEE-0124 | US Form for Application for Permit to Modify |
| BSEE-0149 | US Form for Assignment of Federal OCS Pipeline Right-of-Way Grant |
| BSEE-0125 | US Form for End of Operations Report |
| BSEE-0143 | US Form for Facility/Equipment Damage Report |
| BSEE-0132 | US Form for Hurricane and Tropical Storm Evacuation and Production Curtailment Statistics, Gulf of Mexico OCS Region (GOMR) |
| BSEE-1832 | US Form for Notification of Incidents of Noncompliance |
| BSEE-0133S | US Form for Open Hole Data Report |
| BSEE-0131 | US Form for Performance Measures Data |
| BSEE-0144 | US Form for Rig Movement Notification Report |
| BSEE-0128 | US Form for Semiannual Well Test Report |
| BSEE-0123S | US Form for Supplemental APD Information Sheet |
| BSEE-0133 | US Form for Well Activity Report |
| BSEE-0126 | US Form for Well Potential Test Report |
| FOIA | US Freedom of Information Act (5 U.S.C. Section 552) |
| USGC | US Gulf Coast |
| GEMS | US Gulf Ecological Management Sites program |
| INC | US Incident of Noncompliance |
| OCS-G | US lease numbering system for blocks on the Outer Continental Shelf in the Gulf of Mexico |
| MMC | US Marine Mammal Commission |
| MMPA | US Marine Mammal Protection Act |
| NEPA | US National Environmental Policy Act |
| NCP | US National Oil and Hazardous Substance Pollution Contingency Plan |
| NPS | US National Park Service |
| NPFC | US National Pollution Funds Center |
| NTSB | US National Transportation Safety Board |
| SUPSALV | US Navy Supervisor of Salvage |
| OSHA | US Occupational Safety and Health Administration |
| OMB | US Office of Management and Budget |
| OPA | US Oil Pollution Act of 1990 |
| OPA 90 | US Oil Pollution Act of 1990 |
| RCRA | US Resource Conservation and Recovery Act |
| SOX | US Sarbanes-Oxley Act (also called the US Public Company Accounting Reform and Investor Protection Act) |
| SEC | US Securities and Exchange Commission |
| SPR | US Strategic Petroleum Reserve |
| TSCA | US Toxic Substances Control Act |