US Patent 8904716 Bi-directionally raisable drilling rig mast

Patent 8904716 was granted and assigned to National Oilwell Varco on December, 2014 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Patent Applicant

National Oilwell Varco

Current Assignee

National Oilwell Varco

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

89047160

Patent Inventor Names

Chunqiao Ren0

Robert Benjamin Donnally0

Xilin Liu0

Date of Patent

December 9, 2014

Patent Application Number

138686960

Date Filed

April 23, 2013

Patent Citations Received

‌

US Patent 11873685 Side saddle traversable drilling rig

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US Patent 11933118 High-capacity mast on a drilling rig

Patent Primary Examiner

‌

Mark Wendell

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