Duanwei He

Person

Chengdu, CN

People

Patents Grantslast 30 patents

Information Patent Grant
Producing catalyst-free PDC cutters
- Patent number 12,042,868
- Issue date Jul 23, 2024
- Saudi Arabian Oil Company
- Guodong Zhan
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Fabrication of downhole drilling tools
- Patent number 12,024,470
- Issue date Jul 2, 2024
- Saudi Arabian Oil Company
- Guodong Zhan
- E21 - EARTH DRILLING MINING
Information Patent Grant
Bn) drilling tools made of wurtzite boron nitride (W-BN)
- Patent number 11,866,372
- Issue date Jan 9, 2024
- Saudi Arabian Oil Company
- Guodong Zhan
- B24 - GRINDING POLISHING
Information Patent Grant
Preparation of bulk superhard B-C-N nanocomposite compact
- Patent number 7,938,997
- Issue date May 10, 2011
- Los Alamos National Security, LLC
- Yusheng Zhao
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES

Patents Applicationslast 30 patents

Information Patent Application
Producing Catalyst-free PDC Cutters
- Publication number 20240326126
- Publication date Oct 3, 2024
- Saudi Arabian Oil Company
- Guodong Zhan
- B22 - CASTING POWDER METALLURGY
Information Patent Application
FABRICATION OF DOWNHOLE DRILLING TOOLS
- Publication number 20240308920
- Publication date Sep 19, 2024
- Saudi Arabian Oil Company
- Guodong Zhan
- E21 - EARTH DRILLING MINING
Information Patent Application
Producing Drill Bits Using Catalyst-free PDC Cutters
- Publication number 20230212914
- Publication date Jul 6, 2023
- Saudi Arabian Oil Company
- Guodong Zhan
- E21 - EARTH DRILLING MINING
Information Patent Application
PRODUCING POLYCRYSTALLINE DIAMOND COMPACT (PDC) DRILL BITS WITH CAT...
- Publication number 20230211414
- Publication date Jul 6, 2023
- Saudi Arabian Oil Company
- Guodong Zhan
- B22 - CASTING POWDER METALLURGY
Information Patent Application
FABRICATION OF DOWNHOLE DRILLING TOOLS
- Publication number 20220250989
- Publication date Aug 11, 2022
- Saudi Arabian Oil Company
- Guodong Zhan
- E21 - EARTH DRILLING MINING
Information Patent Application
Producing Catalyst-free PDC Cutters
- Publication number 20210370396
- Publication date Dec 2, 2021
- Saudi Arabian Oil Company
- Guodong Zhan
- B22 - CASTING POWDER METALLURGY
Information Patent Application
DRILLING TOOLS MADE OF WURTZITE BORON NITRIDE (W-BN)
- Publication number 20210371345
- Publication date Dec 2, 2021
- Saudi Arabian Oil Company
- Guodong Zhan
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
Preparation of bulk superhard B-C-N nanocomposite compact
- Publication number 20100237547
- Publication date Sep 23, 2010
- Yusheng Zhao
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES

Person

Patents Grantslast 30 patents

Producing catalyst-free PDC cutters

Fabrication of downhole drilling tools

Bn) drilling tools made of wurtzite boron nitride (W-BN)

Preparation of bulk superhard B-C-N nanocomposite compact

Patents Applicationslast 30 patents

Producing Catalyst-free PDC Cutters

FABRICATION OF DOWNHOLE DRILLING TOOLS

Producing Drill Bits Using Catalyst-free PDC Cutters

PRODUCING POLYCRYSTALLINE DIAMOND COMPACT (PDC) DRILL BITS WITH CAT...

FABRICATION OF DOWNHOLE DRILLING TOOLS

Producing Catalyst-free PDC Cutters

DRILLING TOOLS MADE OF WURTZITE BORON NITRIDE (W-BN)

Preparation of bulk superhard B-C-N nanocomposite compact