US Patent 8157026 Hybrid bit with variable exposure
Patent 8157026 was granted and assigned to Baker Hughes on April, 2012 by the United States Patent and Trademark Office.
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An earth boring drill bit comprising a bit body having a bit profile including nose, shoulder, and gage sections; a plurality of fixed cutting elements secured to the body and defining a fixed cutter profile; and a roller cone rotatably secured to the body, the roller cone having a plurality of roller cone cutting elements defining a roller cutter profile, wherein the fixed cutter profile extends beyond the roller cutter profile in at least one of the sections and the roller cutter profile extends beyond the fixed cutter profile in at least one of the sections. The roller cutter profile may extend beyond the fixed cutter profile in the shoulder and gage sections, possibly with the fixed cutter profile extending beyond the roller cutter profile in the nose section and/or a cone section.
US Patent 08157026 Hybrid bit with variable exposure US Patent 8157026 Hybrid bit with variable exposure
US Patent 08157026 Hybrid bit with variable exposure
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