The drilling companies that have actually completed wells within 15 miles of Billings, ranked by how many, from the well logs each company filed with the state. Billings is in Yellowstone County.
In the last five years, 893 wells were completed within 15 miles of Billings, by 23 different drilling companies. The most active was American Drilling & Supply, with 221. The three busiest companies drilled 60 percent of them, so work here is concentrated among a few outfits.
| Company | Wells within 15 mi | Latest | Closest well |
|---|---|---|---|
| American Drilling & Supply | 221 | 2026 | 1 mi |
| Aaqua Drilling Inc | 158 | 2026 | 1 mi |
| Bertram Drilling Inc | 156 | 2026 | 1 mi |
| Haz Tech Drilling Inc | 96 | 2026 | 0 mi |
| A-1 Drilling | 47 | 2026 | 4 mi |
| Pioneer Technical Services Inc | 44 | 2026 | 0 mi |
| Mayes Drilling Inc | 40 | 2026 | 1 mi |
| Olympus Technical Services | 25 | 2026 | 2 mi |
| West Central Environmental Consultants | 22 | 2026 | 0 mi |
| Sk Geotechnical Co | 17 | 2025 | 2 mi |
| Holt Services Inc | 13 | 2022 | 4 mi |
| 406 Water Wells, Llc | 12 | 2026 | 2 mi |
| Gary Mayes Drilling Inc | 7 | 2025 | 3 mi |
| Gary'S Drilling Inc. | 7 | 2025 | 4 mi |
| Cascade Drilling Lp | 5 | 2024 | 4 mi |
| Environmental West Exploration | 5 | 2022 | 11 mi |
| American Engineering Testing Inc | 2 | 2025 | 4 mi |
| Douglas Drilling | 2 | 2022 | 8 mi |
| Okeefe Drilling Co | 2 | 2025 | 3 mi |
| Vidic Drilling Inc | 2 | 2024 | 9 mi |
| A-10 Drilling | 1 | 2024 | 12 mi |
| Environmental West | 1 | 2022 | 11 mi |
| Potts Drilling Inc | 1 | 2025 | 13 mi |
Source: MBMG Ground Water Information Center well logs completed 2021 to 2026, counted by distance from the center of Billings. Only logs that name a company are ranked. This is a count of public records, not a recommendation; see how to check a driller before you hire. For depth, yield and water level near a specific property, see Montana Water Report.
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