Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2007-08-07
2010-11-02
Stephenson, Daniel P (Department: 3676)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S079000
Reexamination Certificate
active
07823665
ABSTRACT:
A method and apparatus for milling an item in a wellbore. The method and apparatus including providing a milling tool having one or more blades which are geometrically configured to resist deflection by distributing cutting forces in multiple directions.
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GB Search Report, Application No. GB0715115.2, dated Nov. 20, 2007.
Bailey Thomas F.
Halford Hubert E.
Redlinger Thomas M.
Sullivan Michael
Patterson & Sheridan LLP
Stephenson Daniel P
Weatherford / Lamb, Inc.
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