Patent ID: 7762359

Claim:
A cutter assembly, comprising: a housing including a recess; and a cutting element received by and rotatable within the recess of the housing, the cutting element including: a superabrasive table; a substrate including a backing portion bonded to the superabrasive table and a shaft portion extending from the backing portion, the shaft portion including an end region spaced from the backing portion, at least part of the shaft portion positioned within the recess of the housing; a retention element attached to the end region, the retention element including a flared portion that is completely enclosed by the housing, the flared portion of the retention element configured to restrict axial displacement of the cutting element within the recess; an elongated superhard sleeve extending about at least part of the shaft portion of the substrate; and at least one of the substrate or the superabrasive table including surface features configured to promote rotation of the cutting element within the housing during drilling.