Inventor
YU JIAQING
CN25 patents
⚠️ This page may combine multiple inventors who share the name “YU JIAQING”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SMITH INTERNATIONAL
11 patentsUS7703559B2Apr 27, 2010
Rolling cutter
SMITH INTERNATIONAL109 citations99
US9033070B2May 19, 2015
Rolling cutter
SMITH INTERNATIONAL18 citations93
US8800691B2Aug 12, 2014
Rolling cutter
SMITH INTERNATIONAL18 citations93
US7347290B2Mar 25, 2008
Multi-part energizer for mechanical seal assembly
SMITH INTERNATIONAL24 citations92
US7188691B2Mar 13, 2007
Metal seal with impact-absorbing ring
SMITH INTERNATIONAL27 citations92
US7543661B2Jun 9, 2009
Roller cone bits with wear and fracture resistant surface
SMITH INTERNATIONAL24 citations91
US7048080B2May 23, 2006
Roller cone bits with wear and fracture resistant surface
SMITH INTERNATIONAL32 citations91
USRE47369EApr 30, 2019
Rolling cutter
SMITH INTERNATIONAL6 citations84
US7757789B2Jul 20, 2010
Drill bit and insert having bladed interface between substrate and coating
SMITH INTERNATIONAL16 citations79
USRE48455EMar 2, 2021
Rolling cutter
SMITH INTERNATIONAL0 citations63
US9850717B2Dec 26, 2017
Methods for designing fixed cutter bits and bits made using such methods
SMITH INTERNATIONAL0 citations39
CNPC USA CORP
9 patentsUS11365589B2Jun 21, 2022
Cutting element with non-planar cutting edges
CNPC USA CORP3 citations72
US11499378B2Nov 15, 2022
Blade cap force modulation system for a drill bit
CNPC USA CORP4 citations71
US11591858B2Feb 28, 2023
Cutting elements with increased curvature cutting edges
CNPC USA CORP3 citations69
US11808090B2Nov 7, 2023
Force modulation system for a drill bit
CNPC USA CORP0 citations62
US11499377B2Nov 15, 2022
Force modulation system for a drill bit
CNPC USA CORP1 citations62
US12011773B2Jun 18, 2024
Cutting elements with reduced variable back rake angle
CNPC USA CORP0 citations61
US11879296B2Jan 23, 2024
Blade cap force modulation system for a drill bit
CNPC USA CORP0 citations60
US11401749B2Aug 2, 2022
Cutting element with reduced friction
CNPC USA CORP0 citations59
US12435585B1Oct 7, 2025
Hydraulic control apparatus and method for a downhole tool
CNPC USA CORP0 citations47