Patent Assignment
Reel/Frame 052074/0397
Assignment of Assignor's Interest
Recorded: 2020-03-10
Pages: 3
Assignors
LI, QIAN
Executed: 2020-02-26
ZHANG, XIAOLIN
Executed: 2020-02-26
YIN, HU
Executed: 2020-02-26
YIN, WENFENG
Executed: 2020-02-26
GAO, JIAJIA
Executed: 2020-02-26
Assignee
SOUTHWEST PETROLEUM UNIVERSITY
NO.8 XINDU AVENUE, XINDU DISTRICT CHENGDU, SICHUAN, CHENGDU, CHINA
Covered Property
(1)
Safety Drilling System and Method for Preventing Collapse of Water-Sensitive Formation in Upper Part of High-Pressure Saltwater Layer