Issued Patents All Time
Showing 301–324 of 324 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5332035 | Shut-in tools | Craig L. Zitterich, Harold Kent Beck, William L. Bohan | 1994-07-26 |
| 5329811 | Downhole fluid property measurement tool | William L. Bohan | 1994-07-19 |
| 5316087 | Pyrotechnic charge powered operating system for downhole tools | Kevin R. Manke, David S. Wesson | 1994-05-31 |
| 5293937 | Acoustic system and method for performing operations in a well | Ricky M. Holloman | 1994-03-15 |
| 5291796 | Apparatus and method for draining high pressure fluid samples without mercury | Paul D. Ringgenberg | 1994-03-08 |
| 5287741 | Methods of perforating and testing wells using coiled tubing | Gary O. Harkins | 1994-02-22 |
| 5279363 | Shut-in tools | Craig L. Zitterich, Harold Kent Beck, William L. Bohan | 1994-01-18 |
| 5273112 | Surface control of well annulus pressure | — | 1993-12-28 |
| 5273113 | Controlling multiple tool positions with a single repeated remote command signal | — | 1993-12-28 |
| 5265677 | Refrigerant-cooled downhole tool and method | — | 1993-11-30 |
| 5240072 | Multiple sample annulus pressure responsive sampler | Harold Kent Beck | 1993-08-31 |
| 5238070 | Differential actuating system for downhole tools | Kevin R. Manke, Neal G. Skinner | 1993-08-24 |
| 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, Harold Kent Beck, Kevin R. Manke +1 more | 1993-08-17 |
| 5234057 | Shut-in tools | Craig L. Zitterich, Harold Kent Beck, William L. Bohan | 1993-08-10 |
| 5212990 | Method and apparatus for determining flow rates of well fluid constituents | Christopher A. Stout, Kenneth L. Schwendemann | 1993-05-25 |
| 5180007 | Low pressure responsive downhold tool with hydraulic lockout | Kevin R. Manke, Paul D. Ringgenberg | 1993-01-19 |
| 5149984 | Electric power supply for use downhole | Kevin R. Manke, Neal G. Skinner, William L. Bohan, Allen R. Young | 1992-09-22 |
| 5127477 | Rechargeable hydraulic power source for actuating downhole tool | — | 1992-07-07 |
| 5103906 | Hydraulic timer for downhole tool | Harold Kent Beck | 1992-04-14 |
| 5101907 | Differential actuating system for downhole tools | Kevin R. Manke, Neal G. Skinner | 1992-04-07 |
| 5058674 | Wellbore fluid sampler and method | Kevin R. Manke, H. Kent Beck | 1991-10-22 |
| 4971365 | Hydraulic safety joint | — | 1990-11-20 |
| 4962815 | Inflatable straddle packer | James C. Tucker | 1990-10-16 |
| 4957167 | Retrievable fluid control valve with damping | — | 1990-09-18 |