Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6150822 | Sensor in bit for measuring formation properties while drilling | Harry Hong | 2000-11-21 |
| 5670878 | Inspecting a conductive object with a steady state magnetic field and induced eddy current | Pedro F. Lara, Kenneth R. Riggs | 1997-09-23 |
| 5522264 | Method and apparatus for detecting and measuring gelled pigs in tubulars | Lonnie J. Smith | 1996-06-04 |
| 5475309 | Sensor in bit for measuring formation properties while drilling including a drilling fluid ejection nozzle for ejecting a uniform layer of fluid over the sensor | Harry Hong | 1995-12-12 |
| 5251479 | Downhole wellbore tool for measuring flow parameters | Robert W. Siegfried, II | 1993-10-12 |
| 5218573 | Well perforation inspection | — | 1993-06-08 |
| 5119343 | Transducers for acoustic logging tool | — | 1992-06-02 |
| 5069307 | Acoustic signal transmitter for logging tools | — | 1991-12-03 |
| 5063542 | Piezoelectric transducer with displacement amplifier | Steven G. Petermann, Herbert A. Wolcott | 1991-11-05 |
| 5020036 | Magnetostrictive transducer for logging tool | Steven G. Petermann | 1991-05-28 |
| 4975615 | Piezoelectric transducer | — | 1990-12-04 |
| 4949316 | Acoustic logging tool transducers | — | 1990-08-14 |
| 4912683 | Method for acoustically measuring wall thickness of tubular goods | Robert W. Siegfried, II | 1990-03-27 |
| 4899844 | Acoustical well logging method and apparatus | Billy J. Smith | 1990-02-13 |