Patent Assignment
Reel/Frame 019628/0765
Change of Name
Recorded: 2007-08-02
Pages: 3
Assignor
COMPUTALOG LTD.
Executed: 2001-12-31
Assignee
PRECISION DRILLING TECHNOLOGY SERVICES GROUP INC.
4200, 150 - 6TH AVE. SW, CALGARY, T2P3Y7, CANADA
Covered Property
(1)
Adjustable Bent Sub
Patent:
4,813,497 →
Application:
07/181,648 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Oct 9, 1996
From: KENNETH H. WENZEL OILFIELD CONSULTING LTD.
To: GRIFFITH OIL TOOL LTD.; COMPUTALOG LTD.
Reel/Frame 008167/0447 →
Change of Name
Apr 21, 2006
From: PRECISION DRILLING TECHNOLOGY SERVICES GROUP INC.
To: PRECISION ENERGY SERVICES LTD.
Reel/Frame 017507/0063 →
Assignment of Assignor's Interest
Apr 24, 2006
From: PRECISION ENERGY SERVICES LTD.
To: PRECISION ENERGY SERVICES ULC
Reel/Frame 017519/0043 →
Assignment of Assignor's Interest
Apr 26, 2006
From: PRECISION ENERGY SERVICES ULC
To: WEATHERFORD CANADA PARTNERSHIP
Reel/Frame 017527/0191 →