Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8215404 | Stage cementing tool | Gary Joe Makowiecki, Don R. Smith, Frank Acosta | 2012-07-10 |
| 7597146 | Methods and apparatus for completion of well bores | Alton Branch | 2009-10-06 |
| 7533728 | Ball operated back pressure valve | Alton Branch | 2009-05-19 |
| 6976534 | Slip element for use with a downhole tool and a method of manufacturing same | Mike Sutton, Donald R. Smith, Don S. Folds | 2005-12-20 |
| 6695050 | Expandable retaining shoe | Donald R. Smith, Lloyd Crockford | 2004-02-24 |
| 6695051 | Expandable retaining shoe | Donald R. Smith, Lloyd Crockford | 2004-02-24 |
| 6481497 | High temperature high pressure retrievable packer with barrel slip | Loren Swor, Lee W. Stepp, Kenneth G. Neal, Phillip M. Starr | 2002-11-19 |
| 6378606 | High temperature high pressure retrievable packer with barrel slip | Loren Swor, Lee W. Stepp, Kenneth G. Neal, Phillip M. Starr | 2002-04-30 |
| 6318460 | Retrievable high pressure, high temperature packer apparatus with anti-extrusion system and method | Loren Swor, Lee W. Stepp | 2001-11-20 |
| 6102117 | Retrievable high pressure, high temperature packer apparatus with anti-extrusion system | Loren Swor, Lee W. Stepp | 2000-08-15 |
| 5803177 | Well treatment fluid placement tool and methods | Iosif Hriscu | 1998-09-08 |
| 5456322 | Coiled tubing inflatable packer with circulating port | James C. Tucker, Jeffrey S. Walter, Steven L. Schwegman | 1995-10-10 |
| 5383520 | Coiled tubing inflatable packer with circulating port | James C. Tucker, Jeffrey S. Walter, Steven L. Schwegman | 1995-01-24 |
| 5058684 | Drill pipe bridge plug | David Paul Brisco | 1991-10-22 |
| 5044434 | Long stroke packer | Timothy D. Burns, Sr., Kenneth D. Caskey | 1991-09-03 |
| 5029643 | Drill pipe bridge plug | David Paul Brisco | 1991-07-09 |
| 4989672 | Packer locking apparatus | Timothy D. Burns, Sr., Kenneth D. Caskey | 1991-02-05 |
| 4691779 | Hydrostatic referenced safety-circulating valve | Michael E. McMahan, Daniel Anderson Newman, Gary D. Zunkel | 1987-09-08 |
| 4560004 | Drill pipe tester - pressure balanced | Gary Q. Wray | 1985-12-24 |