Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9377334 | Flowmeter having an interchangeable elongate member attached to the inner surface of a pipe section having a radius of curvature | John Hadjioannou, Michael Baugh | 2016-06-28 |
| 7887271 | Apparatus for cutting an internal bore | John Hadjioannou, Keven O'Connor | 2011-02-15 |
| 5360967 | Oilfield equipment identification apparatus | Lawrence A. Denny | 1994-11-01 |
| 5142128 | Oilfield equipment identification apparatus | Lawrence A. Denny | 1992-08-25 |
| 4792000 | Method and apparatus for well drilling | Duane D. Papke | 1988-12-20 |
| 4776410 | Stabilizing tool for well drilling | Duane D. Papke | 1988-10-11 |
| D297847 | Heavy wall drill pipe | Alonzo L. DeCell, Peter Patarini | 1988-09-27 |
| 4771811 | Heavy wall drill pipe and method of manufacture of heavy wall drill pipe | Alonzo L. DeCell, Peter Patarini | 1988-09-20 |
| 4765417 | Reaming apparatus for well drilling | Duane D. Papke | 1988-08-23 |
| 4709462 | Method for assembling a well drilling tool | Duane D. Papke | 1987-12-01 |
| 4674171 | Heavy wall drill pipe and method of manufacture of heavy wall drill pipe | Alonzo L. DeCell, Peter Patarini | 1987-06-23 |
| 4565252 | Borehole operating tool with fluid circulation through arms | Thomas R. Campbell, William L. Cunningham | 1986-01-21 |
| 4282941 | Underreamer with large cutter elements and axial fluid passage | — | 1981-08-11 |