Wellbore milling and drilling

Assignee

• Weatherford/Lamb

Inventors

• David M. Haugen (138 patents)
• William A. Blizzard, Jr. (27 patents)
• Mark W. Schnitker (13 patents)
• Steve R. Delgado (9 patents)
• Thurman B. Carter (37 patents)
• John D. Roberts (17 patents)
• Joseph Mills (3 patents)
• Frederick T. Tilton (39 patents)
• Paul J. Johantges (3 patents)
• Charles W. Pleasants (18 patents)

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