The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 2020
Filed:
Jun. 26, 2018
Applicant:
National Oilwell Varco, L.p., Houston, TX (US);
Inventors:
Robert Benjamin Donnally, Plano, TX (US);
Colin Guo, Shanghai, CN;
Assignee:
NATIONAL OILWELL VARCO, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 15/00 (2006.01); E04H 12/34 (2006.01);
U.S. Cl.
CPC ...
E21B 15/00 (2013.01); E04H 12/345 (2013.01);
Abstract
A center drill floor assembly of a drilling rig structure includes a center floor structure and a drilling rig mast section that is at least partially nested within the center floor structure, wherein the center drill floor assembly is adapted to be transported to a drilling site as a single modular assembly and removably attached as a single modular assembly to a drilling rig substructure during assembly of the drilling rig structure.