Issued Patents All Time
Showing 101–125 of 137 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5826657 | Selectively locking open a downhole tester valve | — | 1998-10-27 |
| 5823264 | Travel joint for use in a subterranean well | — | 1998-10-20 |
| 5813460 | Formation evaluation tool and method for use of the same | Roger L. Schultz, Neal G. Skinner, Margaret C. Waid, Curtis E. Wendler, Robert W. Srubar | 1998-09-29 |
| 5807082 | Automatic downhole pump assembly and method for operating the same | Neal G. Skinner | 1998-09-15 |
| 5799733 | Early evaluation system with pump and method of servicing a well | Neal G. Skinner, Curtis E. Wendler, Roger L. Schultz, Robert W. Srubar, Margaret C. Waid | 1998-09-01 |
| 5791414 | Early evaluation formation testing system | Neal G. Skinner | 1998-08-11 |
| 5782302 | Apparatus and method for loading fluid into subterranean formations | Neal G. Skinner | 1998-07-21 |
| 5649597 | Differential pressure test/bypass valve and method for using the same | — | 1997-07-22 |
| 5597016 | Mechanical lockout for pressure responsive downhole tool | Kevin R. Manke | 1997-01-28 |
| 5558162 | Mechanical lockout for pressure responsive downhole tool | Kevin R. Manke | 1996-09-24 |
| 5555945 | Early evaluation by fall-off testing | Roger L. Schultz, H. Kent Beck, Ronald L. Hinkie | 1996-09-17 |
| 5540280 | Early evaluation system | Roger H. Schultz, H. Kent Beck | 1996-07-30 |
| 5518073 | Mechanical lockout for pressure responsive downhole tool | Kevin R. Manke | 1996-05-21 |
| 5423229 | Apparatus and method for draining high pressure fluid samples without mercury | Roger L. Schultz | 1995-06-13 |
| 5411097 | High pressure conversion for circulating/safety valve | Kevin R. Manke | 1995-05-02 |
| 5341883 | Pressure test and bypass valve with rupture disc | — | 1994-08-30 |
| 5335731 | Formation testing apparatus and method | Harold Kent Beck | 1994-08-09 |
| 5291796 | Apparatus and method for draining high pressure fluid samples without mercury | Roger L. Schultz | 1994-03-08 |
| 5236048 | Apparatus and method for communicating electrical signals in a well, including electrical coupling for electric circuits therein | Neal G. Skinner, Robert A. Moore, Gregory Albert Kliewer, Roger L. Schultz, Harold Kent Beck +1 more | 1993-08-17 |
| 5193621 | Bypass valve | Kevin R. Manke | 1993-03-16 |
| 5180007 | Low pressure responsive downhold tool with hydraulic lockout | Kevin R. Manke, Roger L. Schultz | 1993-01-19 |
| 5180015 | Hydraulic lockout device for pressure controlled well tools | Kevin R. Manke | 1993-01-19 |
| 4848463 | Surface read-out tester valve and probe | Burchus O. Barrington | 1989-07-18 |
| 4817723 | Apparatus for retaining axial mandrel movement relative to a cylindrical housing | — | 1989-04-04 |
| 4753292 | Method of well testing | Wesley J. Burris, II | 1988-06-28 |