Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7918279 | System and method for forming cavities in a well | Lawrence J. Leising, Robert Michael Ramsey | 2011-04-05 |
| 7497259 | System and method for forming cavities in a well | Lawrence J. Leising, Robert Michael Ramsey | 2009-03-03 |
| 7493960 | Apparatus and method to connect two parts without rotation | Lawrence J. Leising | 2009-02-24 |
| 6889771 | Selective direct and reverse circulation check valve mechanism for coiled tubing | Lawrence J. Leising, Robert Michael Ramsey, Peter V. Smith | 2005-05-10 |
| 6776239 | Tubing conveyed fracturing tool and method | David Milton Eslinger, Stephen D. Hill, Randolph J. Sheffield, James M. Costley | 2004-08-17 |
| 6533037 | Flow-operated valve | David Milton Eslinger, James M. Costley, Randolph J. Sheffield, Warren Zemlak | 2003-03-18 |
| 5857710 | Multi-cycle releasable connection | Larry J. Leising | 1999-01-12 |
| 5660241 | Pressure compensated weight on bit shock sub for a wellbore drilling tool | Lawrence J. Leising | 1997-08-26 |
| 5287930 | Valve apparatus for use in sand control | — | 1994-02-22 |
| 4660637 | Packer and service tool assembly | Joseph D. Scranton | 1987-04-28 |
| 4440230 | Full-bore well tester with hydrostatic bias | — | 1984-04-03 |
| 4424860 | Deflate-equalizing valve apparatus for inflatable packer formation tester | — | 1984-01-10 |
| 4408485 | Rotary straddle tester apparatus with safety joint back-off clutch | — | 1983-10-11 |
| 4406461 | Inflatable well packer apparatus reinforced with tire cording | — | 1983-09-27 |