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:
Jun. 11, 2002
Filed:
Oct. 05, 2000
Bjørn Eilertsen, Hundvåg, NO;
Engineering and Drilling Machinery A.S., Stavanger, NO;
Abstract
A rotary table for a drill string, including a stationary frame having a rotating part arranged therein, and hydraulic equipment such as hydraulic slips (wedge-shaped holding collars) and a hydraulic clamp on the rotating part, and also hydraulic power transmission between the stationary part and the rotating part. The hydraulic power transmission for each individual piece of hydraulic equipment includes a hydraulic motor ( ) in the stationary frame ( ), a hydraulic pump ( ) in the rotating part ( ), and a ring ( ) provided with internal and external toothing, wherein the internal toothing is in driving engagement with a gearwheel ( ) on an input shaft in the hydraulic pump and the external toothing is in driving engagement with a gearwheel ( ) on an input shaft in the hydraulic pump and the external toothing is arranged for engageable and disengageable driving interaction with a gearwheel ( ) on an output shaft in the hydraulic motor.