Membership
Tour
Register
Log in
Zhehua Zhang
Follow
Person
The Woodlands, TX, US
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Methods for designing fixed cutter bits and bits made using such me...
Patent number
9,850,717
Issue date
Dec 26, 2017
Smith International, Inc.
Zhehua Zhang
E21 - EARTH DRILLING MINING
Information
Patent Grant
Hybrid disc bit with optimized PDC cutter placement
Patent number
9,574,405
Issue date
Feb 21, 2017
Smith International, Inc.
Peter Thomas Cariveau
E21 - EARTH DRILLING MINING
Information
Patent Grant
High-shear roller cone and PDC hybrid bit
Patent number
9,033,069
Issue date
May 19, 2015
Smith International, Inc.
Zhehua Zhang
E21 - EARTH DRILLING MINING
Information
Patent Grant
Manufacturing methods for high shear roller cone bits
Patent number
8,955,413
Issue date
Feb 17, 2015
Smith International, Inc.
Rahul Bijai
E21 - EARTH DRILLING MINING
Information
Patent Grant
High shear roller cone drill bits
Patent number
8,672,060
Issue date
Mar 18, 2014
Smith International, Inc.
Prabhakaran K. Centala
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
Multi-Piece Body Manufacturing Method Of Hybrid Bit
Publication number
20160319602
Publication date
Nov 3, 2016
Smith International, Inc.
Zhehua Zhang
E21 - EARTH DRILLING MINING
Information
Patent Application
BALANCING OF DRILL BITS
Publication number
20150101868
Publication date
Apr 16, 2015
Smith International, Inc.
Luca Tedeschi
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Application
HYBRID BIT WITH ROLLER CONES NEAR THE BIT AXIS
Publication number
20140353046
Publication date
Dec 4, 2014
Smith International, Inc.
Zhehua Zhang
E21 - EARTH DRILLING MINING
Information
Patent Application
HIGH SHEAR ROLLER CONE DRILL BITS
Publication number
20140196956
Publication date
Jul 17, 2014
Smith International, Inc.
Prabhakaran K. Centala
E21 - EARTH DRILLING MINING
Information
Patent Application
METHODS FOR DESIGNING FIXED CUTTER BITS AND BITS MADE USING SUCH ME...
Publication number
20140110181
Publication date
Apr 24, 2014
Smith International, Inc.
Zhehua Zhang
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Application
HIGH-SHEAR ROLLER CONE AND PDC HYBRID BIT
Publication number
20110162893
Publication date
Jul 7, 2011
Smith International, Inc.
Zhehua Zhang
E21 - EARTH DRILLING MINING
Information
Patent Application
HIGH SHEAR ROLLER CONE DRILL BITS
Publication number
20110024197
Publication date
Feb 3, 2011
Smith International, Inc.
Prabhakaran K. Centala
E21 - EARTH DRILLING MINING
Information
Patent Application
MANUFACTURING METHODS FOR HIGH SHEAR ROLLER CONE BITS
Publication number
20110023663
Publication date
Feb 3, 2011
Smith International, Inc.
Rahul Bijai
E21 - EARTH DRILLING MINING
Information
Patent Application
Hybrid disc bit with optimized PDC cutter placement
Publication number
20070062736
Publication date
Mar 22, 2007
Smith International, Inc.
Peter Thomas Cariveau
E21 - EARTH DRILLING MINING