Jianhua Guo

Follow

Person

Beijing, CN

People

Patents Grantslast 30 patents

Information Patent Grant
Cutting element with reduced friction
- Patent number 11,401,749
- Issue date Aug 2, 2022
- CNPC USA Corporation
- Chris Cheng
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
Cutting Elements with Increased Curvature Cutting Edges
- Publication number 20210180410
- Publication date Jun 17, 2021
- CNPC USA CORPORATION
- JIAQING YU
- E21 - EARTH DRILLING MINING
Information Patent Application
CUTTING ELEMENT WITH REDUCED FRICTION
- Publication number 20210002961
- Publication date Jan 7, 2021
- CNPC USA CORPORATION
- Chris Cheng
- E21 - EARTH DRILLING MINING