Abstract: A reaming tool includes a reaming tool body configured to be coupled within a drill string or a string of drilling tools. A plurality of reaming blocks is attached to the reaming tool body at circumferentially spaced apart locations. Each reaming block comprises at least one row of shear cutters and gouging cutters, the gouging cutters in the at least one row disposed rotationally ahead of the shear cutters in the at least one row.
Type:
Grant
Filed:
February 5, 2018
Date of Patent:
February 25, 2020
Assignee:
Shear Bits, Ltd.
Inventors:
John James Herman, Carl M. Hoffmaster, Kenneth M. Nevlud, Jason Kelley, Shon Carey
Abstract: A drill bit includes a bit body defining a plurality of blades extending from a selected distance from an axis of rotation of the bit body to a gage face. A plurality of only gouging cutters is mounted on the bit body. At least one of the plurality of blades has a blade top surface longitudinally behind the tips of the gouging cutters at a selected distance from the tips of the gouging cutters.
Type:
Grant
Filed:
March 8, 2016
Date of Patent:
October 23, 2018
Assignee:
Shear Bits, Ltd.
Inventors:
John James Herman, Dallas Wilkins, Ryan J. C. Marley, Timothy P. Beaton
Abstract: A mill includes a mill body defining a plurality of blades extending in a direction from a center or rotation of the mill body to a gauge surface. The blades define a cutting profile having a minimum diameter at a longitudinal endmost position. The minimum diameter is smaller than a diameter of a drop ball. The cutting profile has an intermediate diameter at most equal to the diameter of the drop ball at a longitudinal distance from the endmost position greater than the diameter of the drop ball. Shear cutters are mounted on at least one of the plurality of blades, mounted such that at least one shear cutter is mounted closer to a center of rotation of the mill body with respect to other cutters mounted to the blades. At least one insert is mounted to the at least one of the plurality of blades rotationally ahead of the shear cutters.
Type:
Grant
Filed:
July 30, 2015
Date of Patent:
April 24, 2018
Assignee:
Shear Bits, Ltd.
Inventors:
Timothy P. Beaton, Ryan J. C. Marley, Alex Wong, John James Herman, Carl M. Hoffmaster, Kenneth M. Nevlud
Abstract: A drill bit includes a bit body defining a plurality of blades extending from a selected distance from an axis of rotation of the bit body to a gage face. A plurality of only gouging cutters is mounted on the bit body. At least one of the plurality of blades has a blade top surface longitudinally behind the tips of the gouging cutters at a selected distance from the tips of the gouging cutters.
Type:
Application
Filed:
September 4, 2013
Publication date:
March 5, 2015
Applicant:
Shear Bits, Ltd.
Inventors:
John James Herman, Dallas Wilkins, Ryan J. C. Marley, Timothy P. Beaton