Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8631875 | Insert gas lift injection assembly for retrofitting string for alternative injection location | Hai Hoang Nguyen, James H. Kriztler | 2014-01-21 |
| 7841399 | Pressure and friction reducing flow adapter | Joel M. Riggs, Richard YingQing Xu | 2010-11-30 |
| 7431082 | Retaining lines in bypass groove on downhole equipment | Clark W. Beam | 2008-10-07 |
| 7373980 | Mono-trip cement thru completion | Keith E. Lewis, Anthony Orchard, Joseph C. H. Yeo, Jim H. Kritzler, Walter Chapman | 2008-05-20 |
| 7360602 | Barrier orifice valve for gas lift | James H. Kritzler, Vic Arthur Randazzo, Walt R. Chapman | 2008-04-22 |
| 7228897 | Cement through side pocket mandrel | Walter Chapman, James H. Kritzler, Jeffrey L. Osselburn, Keith E. Lewis | 2007-06-12 |
| 7093652 | Plunger with multiple jackets | William R. Gray | 2006-08-22 |
| 7069992 | Mono-trip cement thru completion | Keith E. Lewis, Anthony Orchard, Joseph C. H. Yeo, Jim H. Kritzler, Walter Chapman | 2006-07-04 |
| 6725916 | Plunger with flow passage and improved stopper | William R. Gray | 2004-04-27 |
| 6491105 | Cross-over housing for gas lift valve | — | 2002-12-10 |
| 4759410 | Side pocket mandrel having forged indentations | Wilhelm E. Benker, Max A. Threadgill | 1988-07-26 |
| 4240503 | Blowout preventer shearing and sealing rams | Morris Newman | 1980-12-23 |