Patent Assignment
Reel/Frame 025543/0636
Assignment of Assignor's Interest
Recorded: 2010-12-21
Pages: 3
Assignor
ZHANG, KEWEI
Executed: 2010-11-26
Assignee
TRICAN WELL SERVICE LTD.
645-7TH AVENUE SW, SUITE 2900, CALGARY, T2P 4G8, CANADA
Covered Property
(1)
Control of Particulate Entrainment by Fluids
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.