ROLLING ELEMENT ASSEMBLIES

摘要

A drill bit includes a bit body having one or more blades extending therefrom and a plurality of cutters secured to the one or more blades. One or more rolling elements are positioned on the bit body, and each rolling element has a rotational axis and provides one or more cylindrical bearing portions rotatable about the rotational axis. Each rolling element is rotatably coupled to the bit body within a housing that defines one or more internal bearing surfaces that partially enclose the one or more cylindrical bearing portions but leaves a full length of the rolling element exposed.

主权项

1. A drill bit, comprising:
a bit body having one or more blades extending therefrom; a plurality of cutters secured to the one or more blades; and one or more rolling elements positioned on the bit body, each rolling element having a cylindrical bearing portion defining a rotational axis, wherein each rolling element is rotatably coupled to the bit body about its rotational axis within a housing that defines one or more internal bearing surfaces in engagement with the cylindrical bearing portion, the housing partially encircling the cylindrical bearing portion while leaving a full length of the rolling element exposed.