Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8281877 | Method and apparatus for drilling with casing | David Shahin, Jeff Habetz, David M. Haugen, Gary Thompson, Bernd-Georg Pietras +1 more | 2012-10-09 |
| 7509722 | Positioning and spinning device | David Shahin, Jeff Habetz, Jimmy L. Hollingsworth | 2009-03-31 |
| 7371289 | Cleaning and doping of tubulars | Matthias Luecke | 2008-05-13 |
| 7140445 | Method and apparatus for drilling with casing | David Shahin, Jeff Habetz, David M. Haugen, Gary Thompson, Bernd-Georg Pietras +1 more | 2006-11-28 |
| 7043814 | Method for aligning tubulars | Jimmy L. Hollingsworth | 2006-05-16 |
| 6591471 | Method for aligning tubulars | Jimmy L. Hollingsworth | 2003-07-15 |
| 6453999 | Centralizer | — | 2002-09-24 |
| 5881810 | Centralizer | Jorg Lorenz, Arnold Stokka | 1999-03-16 |
| 5238062 | Centralizer for centring drilling and casing pipes and centralizing arrangement including said centralizer | — | 1993-08-24 |
| 4492134 | Apparatus for screwing pipes together | Hans-Christian Bock | 1985-01-08 |