Patent Assignment
Reel/Frame 044690/0712
Assignment of Assignor's Interest
Recorded: 2018-01-22
Pages: 6
Assignors
ZHOU, CHUN
Executed: 2015-10-14
LIU, FUCHEN
Executed: 2015-10-14
YANG, ZHENZHOU
Executed: 2015-10-14
Assignee
CNPC USA CORPORATION
2901 WILCREST DRIVE, STE. 600, HOUSTON, TEXAS, 77042
Covered Property
(1)
High Density and High Temperature Emulsifier for Use in an Oil Based Drilling Fluid System