The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 2010
Filed:
Jan. 25, 2008
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);
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);
Baker Hughes Incorporated, Houston, TX (US);
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 backup 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.