Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10895661 | Determination of near wellbore properties using natural gamma rays | Qingzhen Guo, Dongwon Lee, Weijun Guo | 2021-01-19 |
| 10480306 | Cement evaluation with neutron-neutron measurement | Weijun Guo | 2019-11-19 |
| 10209393 | Method to correct and pulsed neutron fan based interpretation for shale effects | John Andrew Quirein, Natasa Mekic, Weijun Guo, Christopher S. McIlroy | 2019-02-19 |
| 10156657 | System and method of determining a value indicative of hydrogen index | Weijun Guo | 2018-12-18 |
| 9765599 | Milling well casing using electromagnetic pulse | Michael S. Bittar, Jing Li, Clive D. Menezes | 2017-09-19 |
| 9598953 | Subsea dummy run elimination assembly and related method utilizing a logging assembly | Paul David Ringgenerg, Dalmo Massaru Wakabayashi | 2017-03-21 |
| 9575206 | Downhole evaluation with neutron activation measurement | Weijun Guo | 2017-02-21 |
| 9530581 | Changing the state of a switch through the application of power | Clovis Bonavides, Jim Taylor Hill | 2016-12-27 |
| 9513400 | Ambient-activated switch for downhole operations | Donald L. Crawford | 2016-12-06 |
| 9371718 | Milling well casing using electromagnetic pulse | Michael S. Bittar, Jing Li, Clive D. Menezes | 2016-06-21 |
| 9250354 | Combined sonic/pulsed neutron cased hole logging tool | Kwokshan Kwong | 2016-02-02 |
| 9006645 | Combined sonic/pulsed neutron cased hole logging tool | Kwokshan Kwong | 2015-04-14 |
| 8996315 | Method and system of determining a value indicative of gas saturation of a formation | Weijun Guo, Larry A. Jacobson | 2015-03-31 |
| 8969728 | Smooth wireline | Lawrence Charles Rose | 2015-03-03 |
| 8944162 | Ambient-activated switch for downhole operations | Donald L. Crawford | 2015-02-03 |
| 8881808 | Method of determining a value indicative of fracture quality | Weijun Guo | 2014-11-11 |
| 8739860 | Mechanical actuator with electronic adjustment | Donald L. Crawford | 2014-06-03 |
| 8637806 | Combined sonic/pulsed neutron cased hole logging tool | Kwokshan Kwong | 2014-01-28 |
| 8538701 | Fluid conductivity measurement tool and methods | Sushovon Singha Roy, Donald L. Crawford | 2013-09-17 |
| 8510050 | Systems and methods for downhole fluid typing with pulsed neutron logging | Jerome A. Truax, Steve Zannoni, Weijun Guo | 2013-08-13 |
| 8368553 | Fracturing monitoring within a treatment well | Steve Zannoni, Orlando DeJesus, John Andrew Quirein | 2013-02-05 |
| 8346481 | Method and system of determining a value indicative of gas saturation of a formation | Larry A. Jacobson, Weijun Guo, Jerome A. Truax | 2013-01-01 |