US 9,810,027 B2
Side saddle substructure
Padira Reddy, Houston, TX (US); and Ashish Gupta, Houston, TX (US)
Assigned to Nabors Drilling USA, LP, Houston, TX (US)
Filed by NABORS DRILLING USA, Houston, TX (US)
Filed on Feb. 13, 2014, as Appl. No. 14/180,049.
Claims priority of provisional application 61/764,259, filed on Feb. 13, 2013.
Prior Publication US 2014/0224543 A1, Aug. 14, 2014
Int. Cl. E21B 7/02 (2006.01); E21B 15/00 (2006.01); E21B 21/06 (2006.01); E21B 21/10 (2006.01); E21B 33/06 (2006.01)
CPC E21B 15/003 (2013.01) [E21B 7/02 (2013.01); E21B 21/065 (2013.01); E21B 21/106 (2013.01); E21B 33/06 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A land based drilling rig comprising:
a first elongated substructure:
a second elongated substructure, the second elongated substructure being positioned generally parallel to and spaced apart from the first elongated sub structure;
a drill floor fixedly coupled to the first and second elongated substructures, the drill floor positioned substantially at the top of the first and second elongated sub structures: and
a mast coupled to the first or second elongated substructure, wherein the mast further comprises a V-door side and wherein the V-door side of the mast is perpendicular to a long axis of the first elongated substructure.