Inventor · disambiguated record
Zhehua Zhang
Also filed as: ZHANG ZHEHUA
5 granted patents·4 pending applications·35 citations·filing 2005–2014
77Inventor score
Technology areasE21B
Top patents by PatentIndex Score
9 records- 0183US8672060B2High shear roller cone drill bitsCENTALA PRABHAKARAN K·Filed 2010·Granted Mar 18, 2014·11 cites·27 claims
- 0279US9033069B2High-shear roller cone and PDC hybrid bitZHANG ZHEHUA·Filed 2011·Granted May 19, 2015·12 cites·23 claims
- 0363US8955413B2Manufacturing methods for high shear roller cone bitsBIJAI RAHUL·Filed 2010·Granted Feb 17, 2015·5 cites·19 claims
- 0458US9574405B2Hybrid disc bit with optimized PDC cutter placementCARIVEAU PETER THOMAS·Filed 2005·Granted Feb 21, 2017·7 cites·21 claims
- 0548US2014196956A1High shear roller cone drill bitsSMITH INTERNATIONAL·Filed 2014·Application pending·0 cites
- 0643US9850717B2Methods for designing fixed cutter bits and bits made using such methodsSMITH INTERNATIONAL·Filed 2013·Granted Dec 26, 2017·0 cites·14 claims
- 0743US2015101868A1Balancing of drill bitsSMITH INTERNATIONAL·Filed 2014·Application pending·0 cites
- 0843US2014353046A1Hybrid bit with roller cones near the bit axisSMITH INTERNATIONAL·Filed 2014·Application pending·0 cites
- 0942US2016319602A1Multi-Piece Body Manufacturing Method Of Hybrid BitSMITH INTERNATIONAL·Filed 2014·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →