Threaded cone retention system for roller cone bits

US7975779B2 · kind B2 · utility

Assignee

• Baker Hughes Holdings LLC · US

Inventors

• Anton F. Zahradnik · Saginaw, US
• Don Q. Nguyen · Houston, US
• Eric C. Sullivan · Houston, US
• Terry J. Koltermann · Diemelstraße, US
• Aaron J. Dick · Houston, US
• Scott Shiqiang Shu · Spring, US

Key dates

• Filing date: Sep 25, 2008
• Grant date: Jul 12, 2011
• Expiry date: Jan 24, 2029

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16C2352/00
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An apparatus for retaining a roller cone on a bearing pin of a drill bit body that includes a drill bit body; a bearing pin coupled to the drill bit body; a retention member coupled to the bearing pin; a roller cone coupled to the retention member; and a torque transfer member coupled to the retention member and the roller cone adapted to selectively transfer torque between the retention member and the roller cone.