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:
Mar. 01, 2016
Filed:
Mar. 12, 2013
Nabors Drilling International Limited, Hamilton, BM;
Padira Reddy, Richmond, TX (US);
Ashish Gupta, Houston, TX (US);
Sean M. Bailey, Willis, TX (US);
Richmond Todd Fox, Cypress, TX (US);
Scott G. Boone, Houston, TX (US);
Beat Kuttel, Spring, TX (US);
Nabors Drilling International Limited, Hamilton, BM;
Abstract
According to one aspect, a drilling rig carriage is adapted to move along a drilling mast, and includes a body structure, electric motors coupled to the body structure, and pinions operably coupled to the electric motors, respectively. The pinions are adapted to engage racks, respectively. According to another aspect, a drilling mast includes a longitudinally-extending frame having a first side portion and a second side portion spaced therefrom. Racks are coupled to the frame at the first side portion thereof. According to yet another aspect, an apparatus includes a drilling mast or tower extending longitudinally along an axis, the tower including racks spaced in a parallel relation. A top drive is movable along the axis and relative to the tower. Electric motors are coupled to the top drive and movable therewith. Pinions are operably coupled to the electric motors, respectively, and engage the racks, respectively, to move the top drive.