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Patent Assignment Abstract of Title
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Total Assignments: 1
Patent #:
12000222
Issue Dt:
06/04/2024
Application #:
17767929
Filing Dt:
04/11/2022
Publication #:
20230228162
Pub Dt:
07/20/2023
Inventors:
Jinshan MA, Baojiang SUN, Jintao QI, Liming WEI, Fengliang XI, Xing WANG, Long MA, Lei CHEN et al
Title:
PRESSURE COMPENSATION DEVICE WITH ACCUMULATOR GROUP FOR CONTROLLED PRESSURE DRILLING
Assignment: 1
Reel/Frame:
059606/0060Recorded: 04/14/2022Pages: 9
Conveyance:
ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS).
Assignors:
MA, JINSHAN
Exec Dt:
03/29/2022
SUN, BAOJIANG
Exec Dt:
03/29/2022
QI, JINTAO
Exec Dt:
03/29/2022
WEI, LIMING
Exec Dt:
03/29/2022
XI, FENGLIANG
Exec Dt:
03/29/2022
LIU, GANG
Exec Dt:
03/29/2022
WANG, ZHIYUAN
Exec Dt:
03/29/2022
WANG, XING
Exec Dt:
03/29/2022
XU, HAICHAO
Exec Dt:
03/29/2022
MA, LONG
Exec Dt:
03/29/2022
LUAN, JIACUI
Exec Dt:
03/29/2022
CHEN, LEI
Exec Dt:
03/29/2022
CHEN, GUODONG
Exec Dt:
03/29/2022
ZHAO, YUANLIN
Exec Dt:
03/29/2022
YANG, ZISEN
Exec Dt:
03/29/2022
HUANG, QIANG
Exec Dt:
03/29/2022
MA, MENGLEI
Exec Dt:
03/29/2022
MENG, XIANTAO
Exec Dt:
03/29/2022
WEI, HONGYIN
Exec Dt:
03/29/2022
Assignees:
CNPC BOHAI DRILING ENGINEERING COMPANY LIMITED
NO.83, SECOND STREET, TIANJIN ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE,
TIANJIN, CHINA 300457
CHINA NATIONAL PETROLEUM CORPORATION
NO.9 DONGZHIMEN NORTH STREET, DONGCHENG DISTRICT,
BEIJING, CHINA 100007
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
NO.66, CHANGJIANG WEST ROAD, HUANGDAO DISTRICT, QINGDAO,
SHANDONG, CHINA 266580
Correspondent:
JCIPRNET
8F-1, NO. 100, ROOSEVELT RD. SEC. 2,
TAIPEI, 100404 TAIWAN

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