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:
May. 20, 2014
Filed:
Jan. 25, 2011
Helge Krohn, Sandnes, NO;
Ove Kalvatn, Stavanger, NO;
Mads Grinrød, Stavanger, NO;
Odd B. Skjaerseth, Stavanger, NO;
Helge Krohn, Sandnes, NO;
Ove Kalvatn, Stavanger, NO;
Mads Grinrød, Stavanger, NO;
Odd B. Skjaerseth, Stavanger, NO;
West Drilling Products AS, , NO;
Abstract
A rotary table device is provided with means arranged for suspension of a pipe string. The rotary table comprises a rotary ring arranged rotatably about the central axis of the rotary table. The rotary ring is formed by two or more ring sections, each connected to a system comprising a bearing housing section rotatable relative to a base section, a bearing housing groove being formed in a base contact surface on the bearing housing section and a corresponding base groove being formed in an opposing bearing housing surface in the base section. The grooves form a curve-shaped track for a roller body and the groove has a curvature center coinciding with the central axis of the rotary table. The rolling diameter of the roller body exceeds the collective depth of said grooves, and a channel connecting the end portions of the bearing housing groove is formed in the bearing housing section.