Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8056618 | Flapper mounted equalizer valve for subsurface safety valves | Alan N. Wagner | 2011-11-15 |
| 7967074 | Electric wireline insert safety valve | Richard A. Patterson, Thad D. Andrews | 2011-06-28 |
| 7896082 | Methods and apparatus for negating mineral scale buildup in flapper valves | Ronnie D. Russell | 2011-03-01 |