Inventor · disambiguated record
Daniel Ralph Barnhart
Also filed as: BARNHART DANIEL · BARNHART DANIEL R · BARNHART DANIEL RALPH
6 granted patents·4 pending applications·7 citations·filing 2012–2017
72Inventor score
Technology areasE21B
Top patents by PatentIndex Score
10 records- 0178US10900316B2Wellhead seal with pressure energizing from belowVETCO GRAY INC·Filed 2016·Granted Jan 26, 2021·3 cites·17 claims
- 0273US10138698B2External locking mechanism for seal energizing ringVETCO GRAY INC·Filed 2015·Granted Nov 27, 2018·2 cites·20 claims
- 0355US9376881B2High-capacity single-trip lockdown bushing and a method to operate the sameGETTE NICHOLAS PETER·Filed 2012·Granted Jun 28, 2016·1 cites·20 claims
- 0451US9057231B2Energizing ring divot back-out lockBARNHART DANIEL R·Filed 2012·Granted Jun 16, 2015·1 cites·19 claims
- 0545US9797215B2Ratcheted E-ring retention deviceVETCO GRAY INC·Filed 2014·Granted Oct 24, 2017·0 cites·16 claims
- 0644US9115561B2Load enhanced locking arrangementGETTE NICHOLAS PETER·Filed 2012·Granted Aug 25, 2015·0 cites·12 claims
- 0741US2014238699A1Wellhead annulus seal having a wickered surfaceVETCO GRAY INC·Filed 2013·Application pending·0 cites
- 0838US2014076573A1Casing Debris CleanerGETTE NICHOLAS PETER·Filed 2012·Application pending·0 cites
- 0938US2013248199A1Wellhead assembly having a sinusoidal sealing profile and a method to assemble the sameGETTE NICHOLAS PETER·Filed 2012·Application pending·0 cites
- 1032US2018305984A1Self-limiting c-ring system and methodVETCO GRAY INC·Filed 2017·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →