Paul Lutes

US Patent:

7604072, Oct 20, 2009

Filed:

Jun 7, 2005

Appl. No.:

11/146934

Inventors:

Paul E. Pastusek - Woodlands TX, US
Eric C. Sullivan - Houston TX, US
Daryl L. Pritchard - Shenandoah TX, US
Keith Glasgow - Willis TX, US
Tu Tien Trinh - Houston TX, US
Paul J. Lutes - The Woodlands TX, US

Assignee:

Baker Hughes Incorporated - Houston TX

International Classification:

E21B 47/01

US Classification:

175 40, 7315259

Abstract:

Drill bits and methods for sampling sensor data associated with the state of a drill bit are disclosed. A drill bit for drilling a subterranean formation comprises a bit body and a shank. The shank further includes a central bore formed through an inside diameter of the shank and configured for receiving a data analysis module. The data analysis module comprises a plurality of sensors, a memory, and a processor. The processor is configured for executing computer instructions to collect the sensor data by sampling the plurality of sensors, analyzing the sensor data to develop a severity index, comparing the sensor data to at least one adaptive threshold, and modifying a data sampling mode responsive to the comparison. A method comprises collecting sensor data by sampling a plurality of physical parameters associated with a drill bit state while in various sampling modes and transitioning between those sampling modes.