Patent ID: 9322219
Filing Date: 2016-04-26
CPC Classification: E21B

Claim Text:
1. A drill bit, comprising: a bit body; a plurality of blades extending radially from the bit body, wherein each blade comprises a leading face and a trailing face; a plurality of cutter pockets disposed on the plurality of blades; at least one rolling cutter, wherein each rolling cutter is disposed in one of the cutter pockets, and wherein each rolling cutter comprises a cutting face, a cutting edge, an outer circumferential surface, and a back face; a back retainer disposed adjacent to the back face, wherein the back retainer protrudes partially into the rolling cutter along a rotational axis of the rolling cutter; and a front retainer disposed adjacent to the at least one rolling cutter on the leading face of the blade, wherein each front retainer comprises: a retention end, wherein the retention end is positioned adjacent to a portion of the cutting face of each rolling cutter; and an attachment end, wherein the attachment end is attached to a leading face of the blade adjacent to the one of the cutter pockets.