Assignee
DUAL GRADIENT SYSTEMS LLC
US·4 granted patents·41 citations·filing 2005–2008
Technology mixE21B4
Top patents by PatentIndex Score
4 records- 0177US7584801B2Drill string flow control valves and methodsDUAL GRADIENT SYSTEMS LLC·Filed 2007·Granted Sep 8, 2009·19 cites·21 claims
- 0274US7992654B2Dual gradient drilling method and apparatus with an adjustable centrifugeDUAL GRADIENT SYSTEMS LLC·Filed 2008·Granted Aug 9, 2011·11 cites·28 claims
- 0363US7762357B2Dual gradient drilling method and apparatus with an adjustable centrifugeDUAL GRADIENT SYSTEMS LLC·Filed 2008·Granted Jul 27, 2010·6 cites·25 claims
- 0459US7992655B2Dual gradient drilling method and apparatus with multiple concentric drill tubes and blowout preventersDUAL GRADIENT SYSTEMS LLC·Filed 2005·Granted Aug 9, 2011·5 cites·28 claims
Join the waitlist — get patent alerts
Get an alert when DUAL GRADIENT SYSTEMS LLC files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →