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:
Aug. 13, 2013
Filed:
May. 26, 2008
Per A. Vatne, Kristiansand, NO;
Per A. Vatne, Kristiansand, NO;
Other;
Abstract
A device for a top drive drilling machine, in which a drive shaft (), which is arranged for releasable connection to a drive () and to a first end portion () of a drill pipe (), is provided with a center bore () extending therethrough and arranged for fluid communication between the drilling mud plant () and a fluid bore () in the drill pipe (). First and second releasable, drive-shaft-surrounding, respectively drill-string-surrounding, pressure seals () and a valve () which is arranged to provide, in an open position, a passage () for the drill pipe () or drive shaft (), form a first and a second chamber. A drilling mud inlet () is arranged for the second chamber () and is arranged for fluid communication between the drilling mud plant () and connection housing (). A method for the continuous supply of drilling mud to a drill string () by the use of the drilling machine.