Hybrid drill bit

US8459378B2 · kind B2 · utility

Assignee

• Baker Hughes Holdings LLC · US

Inventors

• Anton F. Zahradnik · Saginaw, US
• Ron D. McCormick · Magnolia, US
• Rudolf Carl Pessier · Houston, US
• Jack T. Oldham · Conroe, US
• Michael S. Damschen · Houston, US
• Don Q. Nguyen · Houston, US
• Matt Meiners · Kuala Lumpur, MY
• Karlos B. Cepeda · Fort Worth, US
• Mark P. Blackman · Spring, US

Key dates

• Filing date: May 13, 2009
• Grant date: Jun 11, 2013
• Expiry date: Oct 8, 2030

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21B10/00
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A bit body is configured at its upper extent for connection into a drillstring. At least one fixed blade extends downwardly from the bit body, and has a radially outermost gage surface. A plurality of fixed cutting elements is secured to the fixed blade, preferably in a row at its rotationally leading edge. At least one bit leg is secured to the bit body and a rolling cutter is mounted for rotation on the bit leg. At least one stabilizer pad is disposed between the bit leg and the fixed blade, the stabilizer pad extending radially outward to substantially the gage surface. The radially outermost gage surface of each blade can extend axially downward parallel to the bit axis or angled (non-parallel), spirally or helically, relative to the bit axis.