| 12060763 |
Cementing apparatus for reverse cementing |
Ishwar Dilip Patil, Handoko Tirto Santoso, Lonnie Carl Helms, Jinhua Cao, Frank Acosta +1 more |
2024-08-13 |
| 11746618 |
Cementing apparatus for reverse cementing |
Ishwar Dilip Patil, Handoko Tirto Santoso, Lonnie Carl Helms, Jinhua Cao, Frank Acosta +1 more |
2023-09-05 |
| 11391119 |
Differential fill valve with collet sleeve |
Rajesh Parameshwaraiah, Min Mark Yuan, Saul Emmanuel Vazquez Niebla, Lonnie Carl Helms, Tor Sigve Saetre +1 more |
2022-07-19 |
| 11230905 |
Buoyancy assist tool with waffle debris barrier |
Lonnie Carl Helms, Min Mark Yuan, Ishwar Dilip Patil, Byong Jun Kim, Rajesh Parameshwaraiah |
2022-01-25 |
| 11142994 |
Buoyancy assist tool with annular cavity and piston |
Min Mark Yuan, Lonnie Carl Helms, Ishwar Dilip Patil, Frank Acosta, Clayton Reed Bonn |
2021-10-12 |
| 11105166 |
Buoyancy assist tool with floating piston |
Min Mark Yuan, Lonnie Carl Helms, Ishwar Dilip Patil, Rajesh Parameshwaraiah |
2021-08-31 |
| 11072990 |
Buoyancy assist tool with overlapping membranes |
Min Mark Yuan, Ishwar Dilip Patil, Lonnie Carl Helms, Clayton Reed Bonn |
2021-07-27 |
| 10995583 |
Buoyancy assist tool with debris barrier |
Lonnie Carl Helms, Min Mark Yuan, Ishwar Dilip Patil, Rajesh Parameshwaraiah |
2021-05-04 |
| 10989013 |
Buoyancy assist tool with center diaphragm debris barrier |
Lonnie Carl Helms, Min Mark Yuan, Ishwar Dilip Patil, Byong Jun Kim, Rajesh Parameshwaraiah |
2021-04-27 |