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:
Apr. 26, 2011
Filed:
Dec. 04, 2006
Bjørn Rudshaug, Kristiansand, NO;
Dag Håverstad, Nodeland, NO;
Bjørn Rudshaug, Kristiansand, NO;
Dag Håverstad, Nodeland, NO;
Aker Kvaerner MH AS, Kristiansand, NO;
Abstract
A well drilling apparatus () (top drive) designed to be suspended from a travelling block () in a drawworks and laterally supported by a dolly () running together with the well drilling apparatus along tracks or rails fixed to a derrick. The drilling apparatus () comprises at least one driving motor (), one power transmission () powered by the at least one driving motor (), a drive shaft () driven from the power transmission () and designed to be connected to a drill string, load transferring means, and a torque arresting device () fixed to and depending from the power transmission (). The load transferring means is in the form of a load frame module () that relieves the drive shaft () and the power transmission () at the same time as the load frame module () forms a central component module that the other main components of the well drilling apparatus are releasable connected to.