Patent ID: 9151120
Filing Date: 2015-10-06
Classification: E21B

Abstract:
1. A downhole cutting tool for use in a well, the downhole cutting tool comprising: a body having a first end for connection with a rotating component of a drill string, a second end for engaging an object disposed in a well, and a plurality of cutting elements disposed along the body for cutting the object, said body further comprising a longitudinal axis and at least one of said cutting elements having a lowermost axial position with respect to said longitudinal axis; wherein the second end includes a fixedly mounted guide member extending axially over the length of its non-cutting spherical shape profile beyond said at least one cutting element for engaging with an interior surface of the object to stabilize the cutting tool during cutting of the object, said guide member having said spherical shape profile for the entirety of its extension beyond said cutting element with said lowermost axial.