Patent ID: 9200487
Filing Date: 2015-12-01
Classification: E21B

Abstract:
1. A roller system for use in a wellbore with a downhole tool and comprising: a mandrel retained in substantially the same azimuthal position as the downhole tool and comprising opposing ends that selectively couple to the downhole tool to define a portion of a downhole string, and a reduced diameter mid portion that defines a spindle, shoulders, and a recess between the shoulders; an annular body that circumscribes the spindle and fits in the recess, the body comprises lateral sections that are fastened together and opposite ends that face shoulders; bearings between the body and the spindle so that body rotates with respect to the mandrel and the downhole string; and rollers mounted on opposing lateral sides of the body that are rotatable about an axis that intersects the housing and that have diameters greater than a height of the body, so that when the downhole string is disposed in the wellbore, the rollers are rotatable with respect to the downhole string.