Patent Assignment
Reel/Frame 016411/0595
Assignment of Assignor's Interest
Recorded: 2005-03-31
Pages: 3
Assignors
STEINER, ADRIAN
Executed: 2005-03-21
MCALARY, RICHARD ALLAN
Executed: 2005-03-21
KRILL, ROSS MICHAEL
Executed: 2005-03-21
Assignee
PRECISION DRILLING TECHNOLOGY SERVICES GROUP INC.
4200. 150-6TH AVENUE, S.W. CALGARY, ALBERTA, T2P 3Y7, CANADA
Covered Property
(1)
Method for the Circulation of Gas When Drilling or Working a Well
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name
Jun 30, 2005
From: PRECISION DRILLING TECHNOLOGY SERVICES GROUP INC.
To: PRECISION ENERGY SERVICES LTD.
Reel/Frame 016735/0393 →
Assignment of Assignor's Interest
Apr 21, 2006
From: PRECISION ENERGY SERVICES LTD.
To: PRECISION ENERGY SERVICES ULC
Reel/Frame 017507/0031 →
Assignment of Assignor's Interest
Apr 26, 2006
From: PRECISION ENERGY SERVICES ULC
To: WEATHERFORD CANADA PARTNERSHIP
Reel/Frame 017527/0191 →