Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8220563 | Ultra-low friction coatings for drill stem assemblies | Narasimha-Rao Venkata Bangaru, Adnan Ozekcin, Hyun-Woo Jin, Erika Ann Ooten Biediger, Vishwas Gupta +2 more | 2012-07-17 |
| 8214188 | Methods and systems for modeling, designing, and conducting drilling operations that consider vibrations | Erika A. O. Biediger, Lei Wang, Shankar Sundararaman, Mehmet Deniz Ertas, Vishwas Gupta | 2012-07-03 |
| 7815713 | Landfill gas purification method and system | Cary V. Sorensen | 2010-10-19 |
| 7348894 | Method and apparatus for using a data telemetry system over multi-conductor wirelines | Marion M. Ringo | 2008-03-25 |
| 7026951 | Data telemetry system for multi-conductor wirelines | Marion M. Ringo | 2006-04-11 |
| 6814141 | Method for improving oil recovery by delivering vibrational energy in a well fracture | Chun Huh, Philip Lee Wylie, Jr., Jung-gi Jane Shyeh | 2004-11-09 |
| 6672405 | Perforating gun assembly for use in multi-stage stimulation operations | Randy C. Tolman, David A. Kinison, Kris J. Nygaard, William A. Sorem, Timothy J. Hall | 2004-01-06 |
| 6488116 | Acoustic receiver | — | 2002-12-03 |
| 5917160 | Single well system for mapping sources of acoustic energy | — | 1999-06-29 |
| 5747750 | Single well system for mapping sources of acoustic energy | Marion M. Ringo | 1998-05-05 |
| H1329 | Drill collar connections | Richard P. McBride, Mark C. Moyer, James B. Day | 1994-07-05 |