Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7643374 | Slowness-frequency projection display and animation | Shu-Kong Chang | 2010-01-05 |
| 6904365 | Methods and systems for determining formation properties and in-situ stresses | Tom R. Bratton, Bikash K. Sinha, Benjamin Peter Jeffryes | 2005-06-07 |
| 6614716 | Sonic well logging for characterizing earth formations | Bikash K. Sinha, Michael R. Kane, Ramachandra Shenoy, Sandip Bose | 2003-09-02 |
| 6510389 | Acoustic detection of stress-induced mechanical damage in a borehole wall | Kenneth W. Winkler, Bikash K. Sinha, Ralph M. D'Angelo, Lawrence E. McGowan | 2003-01-21 |
| 5852587 | Method of and apparatus for sonic logging while drilling a borehole traversing an earth formation | Sergio Kostek, Shu-Kong Chang, Gordon McDaniel, Curtis Randall | 1998-12-22 |
| 5796677 | Method of sonic logging while drilling a borehole traversing an earth formation | Sergio Kostek, Shu-Kong Chang, Gordon McDaniel, Curtis Randall, Jean Pierre Masson +2 more | 1998-08-18 |
| 5521882 | Measurement of formation characteristics using acoustic borehole tool having sources of different frequencies | Ralph M. D'Angelo, Christopher Kimball, Sergio Kostek, Kenneth W. Winkler | 1996-05-28 |
| 5412990 | Method for measuring cement thickening times | Ralph M. D'Angelo, Lawrence M. Schwartz, Peter V. Coveney | 1995-05-09 |
| 5309404 | Receiver apparatus for use in logging while drilling | Sergio Kostek, Shu-Kong Chang | 1994-05-03 |
| 4628725 | Apparatus and method for analyzing a fluid that includes a liquid phase, contained in a tubular conduit | Michel Gouilloud | 1986-12-16 |
| 4283953 | Method and apparatus for determining a granularity property of a subsurface formation around a borehole | — | 1981-08-18 |