Rolling cutter assembled directly to the bit pockets

US8991523B2 · kind B2 · utility

Assignee

• SMITH INTERNATIONAL, INC. · US

Inventors

• Yuelin Shen · Houston, US
• Youhe Zhang · Spring, US
• Yuri Burhan · Spring, US
• Michael A. Siracki · Diemelstraße, US
• Mahavir Nagaraj · Spring, US
• Bala Durairajan · Houston, US
• Scott D. McDonough · Houston, US
• Peter Thomas Cariveau · Spring, US

Key dates

• Filing date: Jun 3, 2011
• Grant date: Mar 31, 2015
• Expiry date: Nov 15, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B23P15/28
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A drill bit includes a bit body, a plurality of blades extending radially from the bit body, a plurality of cutter pockets disposed on the plurality of blades, at least one rolling cutter disposed in one of the cutter pockets, wherein each rolling cutter has a substrate, a cutting face, a cutting edge, and a side surface, and at least one blocker positioned adjacent to each of the at least one rolling cutters on a leading face of the blade, wherein each blocker has a retention end and an attachment end. The retention end of each blocker is positioned adjacent to a portion of the cutting face of each rolling cutter to retain the rolling cutter in the cutter pocket and the attachment end is attached to a portion of the blade.