Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8726996 | Device for the focus and control of dynamic underbalance or dynamic overbalance in a wellbore | Adil Busaidy, Karim Al Sayed, Carlos Erik Baumann, Lawrence A. Behrmann, Harvey Williams +1 more | 2014-05-20 |
| 8347963 | Controlling transient underbalance in a wellbore | Ashley Bernard Johnson, Lawrence A. Behrmann, Wenbo Yang, Ian C. Walton | 2013-01-08 |
| 6966377 | Providing a low pressure condition in a wellbore region | Ashley Bernard Johnson, Lawrence A. Behrmann, Wenbo Yang, Ian C. Walton | 2005-11-22 |
| 6874579 | Creating an underbalance condition in a wellbore | Ashley Bernard Johnson, Lawrence A. Behrmann, Wenbo Yang | 2005-04-05 |
| 6732798 | Controlling transient underbalance in a wellbore | Ashley Bernard Johnson, Lawrence A. Behrmann, Wenbo Yang | 2004-05-11 |