Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11035200 | Downhole formation protection valve | — | 2021-06-15 |
| 10450829 | Drillable plug | Christopher Cromer | 2019-10-22 |
| 10246966 | Downhole seal element of changing elongation properties | — | 2019-04-02 |
| 9080422 | Liner wiper plug with bypass option | — | 2015-07-14 |
| 8047280 | Drillable bridge plug | Lap Tran, William M. Roberts, Piro Shkurti | 2011-11-01 |
| 7980300 | Drillable bridge plug | William M. Roberts, James A. Simson | 2011-07-19 |
| 7810558 | Drillable bridge plug | Piro Shkurti, Lap Tran, William M. Roberts | 2010-10-12 |
| 7455118 | Secondary lock for a downhole tool | William M. Roberts | 2008-11-25 |
| 7424909 | Drillable bridge plug | William M. Roberts, James A. Simson | 2008-09-16 |
| 6772844 | High pressure sealing apparatus and method | Sam S. Lloyd, James A. Simson | 2004-08-10 |
| 6155350 | Ball seat with controlled releasing pressure and method setting a downhole tool ball seat with controlled releasing pressure and method setting a downholed tool | — | 2000-12-05 |
| 5511620 | Straight Bore metal-to-metal wellbore seal apparatus and method of sealing in a wellbore | John L. Baugh | 1996-04-30 |
| 5433275 | Double-threaded anchor tubing assembly | J. Lindley Baugh, Kevin O. Trahan | 1995-07-18 |
| 5417288 | Hydraulic set liner hanger and method | Janice Norris, George Givens | 1995-05-23 |
| 5333692 | Straight bore metal-to-metal wellbore seal apparatus and method of sealing in a wellbore | John L. Baugh | 1994-08-02 |
| 5330001 | Lead in guide assembly | John L. Baugh, James T. Peterson | 1994-07-19 |
| 4911237 | Running tool for liner hanger | — | 1990-03-27 |
| 4848469 | Liner setting tool and method | J. Lindley Baugh, James M. Fraser | 1989-07-18 |