Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10145978 | System and method of determining a value indicative of hydrogen index | Weijun Guo | 2018-12-04 |
| 10061054 | Downhole annulus evaluation apparatus, systems, and methods | Weijun Guo | 2018-08-28 |
| 9840912 | Determining casing fluid capture cross section using gamma count rate ratio | Weijun Guo | 2017-12-12 |
| 9389335 | Pulsed neutron tool for downhole oil typing | Weijun Guo | 2016-07-12 |
| 8996315 | Method and system of determining a value indicative of gas saturation of a formation | Weijun Guo, Daniel F. Dorffer | 2015-03-31 |
| 8898045 | System and method of predicting gas saturation of a formation using neural networks | Dingding Chen, Weijun Guo | 2014-11-25 |
| 8847149 | Determining formation characteristics | Gordon L. Moake | 2014-09-30 |
| 8660796 | Method and system of processing gamma count rate curves using neural networks | Dingding Chen, John Andrew Quirein | 2014-02-25 |
| 8346481 | Method and system of determining a value indicative of gas saturation of a formation | Weijun Guo, Jerome A. Truax, Daniel F. Dorffer | 2013-01-01 |
| 8050866 | Pulsed-neutron formation density | — | 2011-11-01 |
| 8044342 | Method and system for calculating extent of a formation treatment material in a formation | James E. Galford, Jerome A. Truax | 2011-10-25 |
| 7117092 | Pulsed-neutron formation density | — | 2006-10-03 |
| 5672867 | Method for filtering gamma ray well logging tool response to enhance vertical detail while suppressing statistical noise | Larry L. Gadeken, Gulamabbas Merchant | 1997-09-30 |
| 5600135 | Spectral gain stabilization using gross shape features of largely invariant spectra | — | 1997-02-04 |
| 5406078 | Induced gamma ray spectorscopy well logging system | — | 1995-04-11 |
| 5227972 | Matched filter data smoothing system | — | 1993-07-13 |
| 4600838 | Methods and apparatus for measuring thermal neutron decay characteristics of earth formations | Donald K. Steinman | 1986-07-15 |
| 4223218 | Methods and apparatus for optimizing measurements of thermal neutron decay characteristics | — | 1980-09-16 |