Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11480051 | Apply multi-physics principle for well integrity evaluation in a multi-string configuration | Weijun Guo, Burkay Donderici | 2022-10-25 |
| 11105951 | Calibration of a gamma logging tool | Gordon L. Moake, Wei Zhang | 2021-08-31 |
| 10941653 | Apparatus, system, and method for downhole imaging using a non-rotatable imaging tool having a radiation detector | James E. Galford | 2021-03-09 |
| 10920568 | Evaluating cement integrity in a wellbore with multiple casing strings | Weijun Guo | 2021-02-16 |
| 10753193 | Heterogeneity profiling analysis for volumetric void space cement evaluation | Weijun Guo | 2020-08-25 |
| 10677040 | Material evaluation using nuclear logging tool | Weijun Guo | 2020-06-09 |
| 10605954 | Simultaneous evaluation of the volume and the position of voids in downhole cement | Weijun Guo | 2020-03-31 |
| 10551523 | Evaluating and imaging volumetric void space location for cement evaluation | Weijun Guo | 2020-02-04 |
| 10459112 | Determining a characteristic of a material surrounding a wellbore based on count rates of scattered photons | Weijun Guo | 2019-10-29 |
| 10393917 | Cement evaluation with X-ray tomography | Weijun Guo | 2019-08-27 |
| 10288749 | Photon collimation apparatus, methods, and systems | Dongwon Lee, Weijun Guo | 2019-05-14 |
| 10281593 | Energy detection apparatus, methods, and systems | Weijun Guo | 2019-05-07 |
| 10209395 | Formation independent cement evaluation with active gamma ray detection | Weijun Guo | 2019-02-19 |
| 10126433 | Energy detection apparatus, methods, and systems | Weijun Guo | 2018-11-13 |
| 10067261 | Downhole photon radiation detection using scintillating fibers | Weijun Guo | 2018-09-04 |
| 9951614 | Behind pipe evaluation using a nuclear density tool | Weijun Guo | 2018-04-24 |