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last 30 patents
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Patent Grant
Pressure compensation device with accumulator group for controlled...
Patent number
12,000,222
Issue date
Jun 4, 2024
CNPC BOHAI DRILING ENGINEERING COMPANY LIMITED
Jinshan Ma
G05 - CONTROLLING REGULATING
Patents Applications
last 30 patents
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Patent Application
PRESSURE COMPENSATION DEVICE WITH ACCUMULATOR GROUP FOR CONTROLLED...
Publication number
20230228162
Publication date
Jul 20, 2023
CNPC BOHAI DRILING ENGINEERING COMPANY LIMITED
Jinshan MA
E21 - EARTH DRILLING MINING
Information
Patent Application
PARALLEL PROXY MODEL BASED MACHINE LEARNING METHOD FOR OIL RESERVOI...
Publication number
20210398002
Publication date
Dec 23, 2021
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
Kai ZHANG
G06 - COMPUTING CALCULATING COUNTING