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US Patent 8820437 Cementing whipstock apparatus and methods

Patent 8820437 was granted and assigned to Smith International on September, 2014 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Smith International

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

88204370

Patent Inventor Names

Philip M. Gregurek0

David L. Ervin0

John E. Campbell0

Shantanu N. Swadi0

Charles H. Dewey0

Date of Patent

September 2, 2014

Patent Application Number

130855860

Date Filed

April 13, 2011

Patent Citations Received

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US Patent 11697968 Casing float tool

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US Patent 11713649 Plugging device

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US Patent 11761289 Shearable sleeve

Patent Primary Examiner

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Jennifer H Gay

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