| 8881835 |
Manipulator tool and tool catcher useful with wellbore reverse circulation |
Barry J. Tate, Tommy M. Warren |
2014-11-11 |
| 8443906 |
Tools and methods useful with wellbore reverse circulation |
Barry J. Tate, Tommy M. Warren |
2013-05-21 |
| 7647990 |
Method for drilling with a wellbore liner |
Tommy M. Warren, Barry J. Tate |
2010-01-19 |
| 7637330 |
Casing bottom hole assembly retrieval process |
Per Angman, Tommy M. Warren |
2009-12-29 |
| 7624820 |
Method for drilling with casing |
Per Angman |
2009-12-01 |
| 7475742 |
Method for drilling with casing |
Per Angman |
2009-01-13 |
| 7472763 |
Wear resistant tubular connection |
Maurice William Slack, Per Angman, Tommy M. Warren |
2009-01-06 |
| 7219727 |
Wear resistant tubular connection |
Maurice William Slack, Per Angman, Tommy M. Warren |
2007-05-22 |
| 7140455 |
Valve method for drilling with casing using pressurized drilling fluid |
Bruno Walter, Per Angman |
2006-11-28 |
| 7108080 |
Method and apparatus for drilling a borehole with a borehole liner |
Bruce D. Houtchens |
2006-09-19 |
| 7013992 |
Borehole stabilization while drilling |
Tommy M. Warren, Per Angman, Maurice William Slack |
2006-03-21 |
| 6705413 |
Drilling with casing |
— |
2004-03-16 |
| 6585052 |
Casing centralizer |
Per Angman |
2003-07-01 |
| 6513223 |
Method for installing a centralizer retaining collar and outer sleeve |
Per Angman |
2003-02-04 |
| 5433279 |
Portable top drive assembly |
Per Angman |
1995-07-18 |
