Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8919452 | Casing spears and related systems and methods | Larry T. Palmer, Gregory L. Hern | 2014-12-30 |
| 8393388 | Retractable petal collet backup for a subterranean seal | David S. Bishop | 2013-03-12 |
| 8322413 | Twin latch wireline retrieval tool | David S. Bishop | 2012-12-04 |
| 8307891 | Retractable downhole backup assembly for circumferential seal support | David S. Bishop, James C. Doane | 2012-11-13 |
| 8016295 | Helical backup element | Randall V. Guest, Marc Samuelson, Justin P. Vinson | 2011-09-13 |
| 7806177 | Retractable downhole backup assembly for circumferential seal support | David S. Bishop, Marc Samuelson | 2010-10-05 |
| 6651738 | Downhole isolation device with retained valve member | Matthew D. Solfronk | 2003-11-25 |
| 6167963 | Removable non-metallic bridge plug or packer | Michael E. McMahan, Yusheng Yuan | 2001-01-02 |