| 12060763 |
Cementing apparatus for reverse cementing |
Ishwar Dilip Patil, Handoko Tirto Santoso, Lonnie Carl Helms, Jinhua Cao, Mayur Narain Ahuja +1 more |
2024-08-13 |
| 11746618 |
Cementing apparatus for reverse cementing |
Ishwar Dilip Patil, Handoko Tirto Santoso, Lonnie Carl Helms, Jinhua Cao, Mayur Narain Ahuja +1 more |
2023-09-05 |
| 11603736 |
Buoyancy assist tool with degradable nose |
Lonnie Carl Helms, Min Mark Yuan |
2023-03-14 |
| 11566489 |
Stage cementer packer |
Ishwar Dilip Patil, Lonnie Carl Helms, Avinash Gopal Dharne, Priyanshkumar Prashantkumar Desai |
2023-01-31 |
| 11549323 |
Systems and methods for bonding a downhole tool to a borehole tubular |
William Cecil Pearl, Jr., Sam Lewis, Lonnie Carl Helms |
2023-01-10 |
| 11519242 |
Telescopic stage cementer packer |
Avinash Gopal Dharne, Lonnie Carl Helms, Ishwar Dilip Patil |
2022-12-06 |
| 11512545 |
Downhole check valve assembly with a ratchet mechanism |
Min Mark Yuan, Stephen Yeldell, Lonnie Carl Helms, Kevin Wendell Ardoin |
2022-11-29 |
| 11492867 |
Downhole apparatus with degradable plugs |
Min Mark Yuan, Lonnie Carl Helms |
2022-11-08 |
| 11473395 |
Downhole check valve assembly with a locking mechanism |
Stephen Yeldell, Kevin Wendell Ardoin, Lonnie Carl Helms, Min Mark Yuan |
2022-10-18 |
| 11391117 |
Annular casing packer collar stage tool for cementing operations |
Ben E. Dawsey |
2022-07-19 |
| 11359454 |
Buoyancy assist tool with annular cavity and piston |
Lonnie Carl Helms |
2022-06-14 |
| 11346171 |
Downhole apparatus |
Min Mark Yuan, Stephen Yeldell, Lonnie Carl Helms, Rajesh Parameshwaraiah |
2022-05-31 |
| 11293260 |
Buoyancy assist tool |
Avinash Gopal Dharne, Stephen Yeldell, Min Mark Yuan, Kevin Wendell Ardoin |
2022-04-05 |
| 11293261 |
Buoyancy assist tool |
Min Mark Yuan, Stephen Yeldell, Lonnie Carl Helms, Rajesh Parameshwaraiah, Kevin Wendell Ardoin |
2022-04-05 |
| 11280157 |
Multi-stage cementing tool |
Lonnie Carl Helms |
2022-03-22 |
| 11255155 |
Downhole apparatus with removable plugs |
Min Mark Yuan, Lonnie Carl Helms, Rajesh Parameshwaraiah |
2022-02-22 |
| 11242720 |
Threadless float equipment and method |
Handoko Tirto Santoso, Min Mark Yuan, Stephen Yeldell, Rajesh Parameshwaraiah |
2022-02-08 |
| 11199071 |
Full bore buoyancy assisted casing system |
Lonnie Carl Helms, Kevin Wendell Ardoin, Stephen Yeldell, Julio Alberto Cornejo, Saul Emmanuel Vazquez Niebla +1 more |
2021-12-14 |
| 11142994 |
Buoyancy assist tool with annular cavity and piston |
Min Mark Yuan, Lonnie Carl Helms, Mayur Narain Ahuja, Ishwar Dilip Patil, Clayton Reed Bonn |
2021-10-12 |
| 11118423 |
Downhole tool for use in a borehole |
Lonnie Carl Helms |
2021-09-14 |
| 10053945 |
Breakaway obturator for downhole |
Nicholas Frederick Budler, John Key, Lonnie Carl Helms |
2018-08-21 |
| 9988872 |
Pressure relief-assisted packer |
Lonnie Carl Helms |
2018-06-05 |
| 9500066 |
System and method for activating a down hole tool |
Nicholas Frederick Budler, John Key |
2016-11-22 |
| 9476273 |
Pressure activated down hole systems and methods |
Lonnie Carl Helms, John Key, Nicholas Frederick Budler |
2016-10-25 |
| 9376886 |
Multiple ramp compression packer |
Wesley G. Duke, Stoney M. Yates, John Key, Nicholas Frederick Budler |
2016-06-28 |