Assignment of Assignor's Interest

Recorded: 2007-12-07 Pages: 2

Assignor

STEELHEAD RECLAMATION LTD.

Executed: 2007-04-30

Assignee

TRICAN WELL SERVICE LTD

SUITE 2900, 645 - 7TH AVENUE SW, CALGARY, T2P 4G8, CANADA

Covered Properties (2)

Process and Plug for Well Abandonment

Patent: 5,667,010 →

Application: 08/408,156 →

Process and Seal for Minimizing Interzonal Migration in Boreholes

Patent: 5,992,522 →

Application: 08/929,256 →

Related Assignments (2)

Other recorded transfers of the patents in this record — the chain of ownership.