Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9194201 | System and method for deploying a downhole casing patch | Ronald G. Schmidt | 2015-11-24 |
| 8887798 | Hydraulic stabilizer for use with a downhole casing cutter | Ronald G. Schmidt, Charles H. Dewey | 2014-11-18 |
| 8657040 | Percussion drilling assembly and locking system therefor | Alan J. Marshall, Shantanu N. Swadi | 2014-02-25 |
| 7980300 | Drillable bridge plug | William M. Roberts, George J. Melenyzer | 2011-07-19 |
| 7424909 | Drillable bridge plug | William M. Roberts, George J. Melenyzer | 2008-09-16 |
| 7066249 | Cementing manifold assembly | — | 2006-06-27 |
| 6904970 | Cementing manifold assembly | — | 2005-06-14 |
| 6772844 | High pressure sealing apparatus and method | Sam S. Lloyd, George J. Melenyzer | 2004-08-10 |
| 6009943 | Liner assembly and method | John M. Yokley, Mark J. Murray, Robert Olman | 2000-01-04 |
| 5884702 | Liner assembly and method | John M. Yokley, Mark J. Murray, Robert Olman | 1999-03-23 |
| 5472055 | Liner hanger setting tool | John M. Yokley | 1995-12-05 |