| 11639638 |
Combination tubular handler and power swivel unit |
Larry G. Keast, Jonathan Garrett Johnston, Stephen Lee Gerhauser, Jr., Keith J. Orgeron |
2023-05-02 |
| 11208854 |
Combination tubular handler and power swivel unit |
Larry G. Keast, Jonathan Garrett Johnston, Stephen Lee Gerhauser, Jr., Keith J. Orgeron |
2021-12-28 |
| 10851601 |
Combination tubular handler and power swivel unit |
Larry G. Keast, Jonathan Garrett Johnston, Stephen Lee Gerhauser, Jr., Keith J. Orgeron |
2020-12-01 |
| 8127836 |
Top drive with an airlift thread compensator and a hollow cylinder rod providing minimum flexing of conduit |
Larry G. Keast, James R. Strickland |
2012-03-06 |
| 7984757 |
Drilling rig with a top drive with an air lift thread compensator and a hollow cylinder rod providing minimum flexing of conduit |
Larry G. Keast, James R. Strickland |
2011-07-26 |
| 7921939 |
Method for using a top drive with an air lift thread compensator and a hollow cylinder rod providing minimum flexing of conduit |
Larry G. Keast, James R. Strickland |
2011-04-12 |