1
Paul E Pastusek, Eric C Sullivan, Daryl L Pritchard, Keith Glasgow, Tu Tien Trinh, Paul J Lutes: Method and apparatus for collecting drill bit performance data. Baker Hughes Incorporated, TraskBritt PC, October 20, 2009: US07604072 (26 worldwide citation)

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 rece ...


2
Tu Tien Trinh, Eric Sullivan: Hydrostatic bearing. Baker Hughes Incorporated, Bracewell & Giuliani, November 24, 2009: US07621346 (25 worldwide citation)

A roller cone bit having a sealed lubricant reservoir between a roller cone and a head section. A journal sleeve is included on the head section that circumscribes the journal bearing surface of the head section. The sleeve can axially pivot on the head section, but does not rotate thereon. The rese ...


3
Eric C Sullivan, Tu Tien Trinh: Methods and apparatuses for measuring drill bit conditions. Baker Hughes Incorporated, TraskBritt, January 3, 2012: US08087477 (21 worldwide citation)

Drill bits and methods of measuring drill bit conditions are disclosed. A drill bit for drilling a subterranean formation comprises a bit bearing at least one cutting element and adapted for coupling to a drill string. The drill bit may also comprise a chamber formed within the bit and configured fo ...


4
Paul E Pastusek, Eric C Sullivan, Daryl L Pritchard, Keith Glasgow, Tu Tien Trinh, Paul J Lutes: Method and apparatus for collecting drill bit performance data. Baker Hughes Incorporated, TraskBritt, March 3, 2009: US07497276 (18 worldwide citation)

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 rece ...


5
Paul E Pastusek, Eric C Sullivan, Daryl L Pritchard, Keith Glasgow, Tu Tien Trinh, Paul J Lutes: Method and apparatus for collecting drill bit performance data. Baker Hughes Incorporated, TraskBritt, March 31, 2009: US07510026 (17 worldwide citation)

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 rece ...


6
Paul E Pastusek, Eric C Sullivan, Daryl L Pritchard, Keith Glasgow, Tu Tien Trinh, Paul J Lutes: Method and apparatus for collecting drill bit performance data. Baker Hughes Incorporated, TraskBritt, March 24, 2009: US07506695 (14 worldwide citation)

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 rece ...


7
Tu Tien Trinh, Eric Sullivan, David A Curry: Bit based formation evaluation using a gamma ray sensor. Baker Hughes Incorporated, Cantor Colburn, July 3, 2012: US08210280 (11 worldwide citation)

A drill bit made according to one embodiment includes at least a gamma ray sensor configured to provide signals representative of a presence and/or amount of a naturally occurring gamma ray source when the drill bit is used for cutting into a formation. A circuit may be configured to process signals ...


8
Tu Tien Trinh, Eric Sullivan: Bit based formation evaluation and drill bit and drill string analysis using an acoustic sensor. Baker Hughes Incorporated, Cantor Colburn, July 10, 2012: US08215384 (11 worldwide citation)

A drill bit having a bit body includes one or more acoustic sensors that are configured to detect elastic waves when the drill bit is used for drilling a wellbore. The acoustic sensor may be configured to detect a sonic signature associated with a failure event. In further arrangements, the acoustic ...


9
Tu Tien Trinh, Eric Sullivan: Apparatus and method for determining corrected weight-on-bit. Baker Hughes Incorporated, Cantor Colburn, August 21, 2012: US08245793 (9 worldwide citation)

In one aspect, a method of determining a corrected weight-on-bit is provided, which method, in one embodiment, may include: drilling a wellbore with the drill bit; determining a weight-on-bit while drilling the wellbore; determining a pressure differential across an effective area of the drill bit w ...


10
Tu Tien Trinh, Eric Sullivan, Daryl Pritchard: Drill bit with a sensor for estimating rate of penetration and apparatus for using same. Baker Hughes Incorporated, Cantor Colburn, May 24, 2011: US07946357 (9 worldwide citation)

In one embodiment, an apparatus includes a drill bit, a tip on a bit body configured to contact a formation when the drill bit is utilized to cut into the formation, and a spring coupled to the tip. The apparatus also includes a sensor coupled to the spring and configured to provide signals correspo ...