Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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, Alan Bing Joe Shem | 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, Alan Bing Joe Shem | 2011-04-12 |