David Gavia - The Woodlands TX, US Ryan J. Hanford - Houston TX, US Lane E. Snell - Denver CO, US Jason E. Hoines - Montgomery TX, US Matthew R. Isbell - Houston TX, US Eric E. McClain - Spring TX, US Michael L. Doster - Spring TX, US
Assignee:
Baker Hughes Incorporated - Houston TX
International Classification:
E21B 10/43
US Classification:
175431
Abstract:
A rotary drag bit includes a primary cutter row comprising at least one primary cutter and a multiple backup cutter group. The multiple backup cutter group comprises a first and second trailing cutter row, each comprising at least one cutter positioned to follow the at least one primary cutter. The rotary drag bit life is extended by the multiple backup cutter groups making the bit more durable and extending the life of the cutters. Further, the cutters of the multiple backup cutter group are configured to selectively engage a subterranean formation material being drilled, providing improved bit life and reduced stress upon the cutters. Other embodiments of rotary drag bits are provided.
Eric E. McClain - Spring TX, US David Gavia - The Woodlands TX, US Lane E. Snell - Denver CO, US Jason E. Hoines - Montgomery TX, US Matthew R. Isbell - Houston TX, US Michael L. Doster - Spring TX, US
International Classification:
E21B 10/43
US Classification:
175431, 703 1
Abstract:
A rotary drag bit includes a primary cutter row comprising at least one primary cutter, and at least two additional cutters configured relative to one another. In one embodiment, the cutters are backup cutters of a cutter group located in respective first and second trailing cutter rows, oriented relative to one another, and positioned to substantially follow the at least one primary cutter. The rotary drag bit life is extended by the backup cutter group, making the bit more durable and extending the life of the cutters. In other of the embodiments, the cutters are configured to selectively engage a subterranean formation material being drilled, providing improved bit life and reduced stress upon the cutters. Still other embodiments of rotary drag bits include backup cutter configurations having different backrake angles and siderake angles, including methods therefor.
Apparatus And Method For Drilling Wellbores Based On Mechanical Specific Energy Determined From Bit-Based Weight And Torque Sensors
Tu Tien Trinh - Houston TX, US Eric Sullivan - Houston TX, US Lane E. Snell - Wheat Ridge CO, US
Assignee:
BAKER HUGHES INCORPORATED - HOUSTON TX
International Classification:
E21B 7/04 E21B 47/024
US Classification:
175 50, 175 61
Abstract:
The disclosure, in one aspect, provides a method of drilling a wellbore that includes features of drilling the wellbore using a drilling assembly that includes a drill bit that further includes a weight sensor and a torque sensor, determining weight-on-bit using measurements from the weight sensor and torque-on-bit using measurement from the torque sensor during drilling of the wellbore, obtaining measurements for rotational speed of the drill bit and rate of penetration of the drill bit during drilling of the wellbore, determining mechanical specific energy of the bottomhole assembly using the determined weight-on-bit, torque-on-bit and obtained rotational speed of the drill bit and the obtained rate of penetration of the drill bit, and altering a drilling a parameter in response to the determined mechanical specific energy.
- Vernal UT, US Joseph Aschenbrenner - Blackfoot ID, US Joshua J. Smith - Vernal UT, US Lane Snell - Wheat Ridge CO, US
Assignee:
Extreme Technologies, LLC - Vernal UT
International Classification:
F16C 43/02 F16C 33/04 F16C 33/08
Abstract:
A system includes a device with at least one recess with a wall. The at least one recess includes a first hole with a first diameter. At least one bearing surface is configured to be inserted into and removed from the at least one recess. The at least one bearing surface includes a second hole with a second diameter that is less than the first diameter. At least one cross-pin is configured to be positioned within the first hole and the second hole. At least one washer is positioned within the recess provides a biasing force to urge the bearing surface upward.
Low-friction, abrasion resistant systems of replaceable bearing surfaces and methods of using the system are disclosed. The system comprises a device having at least one recess, each recess having a groove in an inner wall of the recess; a plurality of replaceable bearing surfaces adapted to be inserted into and removed from the at least one recess without damaging the device; and at least one snap ring adapted to engage the groove in each recess and secure a replaceable bearing surface within the recess.