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Patents Grants
last 30 patents
Information
Patent Grant
Blade cap force modulation system for a drill bit
Patent number
11,879,296
Issue date
Jan 23, 2024
CNPC USA Corporation
Ming Zhang
E21 - EARTH DRILLING MINING
Information
Patent Grant
Force modulation system for a drill bit
Patent number
11,808,090
Issue date
Nov 7, 2023
CNPC USA Corporation
Ming Zhang
E21 - EARTH DRILLING MINING
Information
Patent Grant
Force modulation system with an elastic force member for downhole c...
Patent number
11,702,891
Issue date
Jul 18, 2023
CNPC USA Corporation
Lei Zhao
E21 - EARTH DRILLING MINING
Information
Patent Grant
Blade cap force modulation system for a drill bit
Patent number
11,499,378
Issue date
Nov 15, 2022
CNPC USA Corporation
Ming Zhang
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
ULTRA-HIGH TEMPERATURE RESISTANT CEMENT SLURRY SYSTEM FOR CEMENTING...
Publication number
20240336828
Publication date
Oct 10, 2024
CHINA NATIONAL PETROLEUM CORPORATION
Jianzhou JIN
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Application
FORCE MODULATION SYSTEM FOR A DRILL BIT
Publication number
20230015607
Publication date
Jan 19, 2023
CNPC USA CORPORATION
Ming ZHANG
E21 - EARTH DRILLING MINING
Information
Patent Application
BLADE CAP FORCE MODULATION SYSTEM FOR A DRILL BIT
Publication number
20230015380
Publication date
Jan 19, 2023
CNPC USA CORPORATION
Ming ZHANG
E21 - EARTH DRILLING MINING
Information
Patent Application
FORCE MODULATION SYSTEM FOR A DRILL BIT
Publication number
20220162913
Publication date
May 26, 2022
CNPC USA Corporation
Ming ZHANG
E21 - EARTH DRILLING MINING
Information
Patent Application
BLADE CAP FORCE MODULATION SYSTEM FOR A DRILL BIT
Publication number
20220162914
Publication date
May 26, 2022
CNPC USA Corporation
Ming ZHANG
E21 - EARTH DRILLING MINING
Information
Patent Application
METHOD FOR MAKING NANO- AND MICRO-PARTICLES FOR USE AS A PROPPANT A...
Publication number
20200216750
Publication date
Jul 9, 2020
CNPC USA CORPORATION
Lijun Lin
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information
Patent Application
TOOL ASSEMBLY WITH A FLUIDIC AGITATOR AND A COATING
Publication number
20200048993
Publication date
Feb 13, 2020
CNPC USA Corp.
Jianhui XU
E21 - EARTH DRILLING MINING
Information
Patent Application
SHALE INHIBITORS USED IN THE WATER-BASED FLUID FOR SHALE FORMATION
Publication number
20190382642
Publication date
Dec 19, 2019
CNPC USA CORPORATION
Chun Zhou
C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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