US Patent 7140447 Subsurface annular safety barrier
Patent 7140447 was granted and assigned to Schlumberger on November, 2006 by the United States Patent and Trademark Office.
Is a
Current Assignee
Date Filed
November 6, 2003
0
Date of Patent
November 28, 2006
0
Patent Application Number
10702883
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Patent Inventor Names
Peter Krawiec
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Youel G. Hilsman
0
Dwayne D. Leismer
0
Patent Jurisdiction
Patent Number
Patent Primary Examiner
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