CUTTING ELEMENTS FOR DOWNHOLE CUTTING TOOLS

摘要

A downhole cutting tool for use in a well, the well having a surface location and a downhole location, comprises a body having a first end for connection with a rotating component of a drill string and a cutting end for rotation in unison with the body. The cutting end comprises a first cutting element and a second cutting element, each of the first and second cutting elements comprising a cutting profile disposed asymmetrically along a cutting face of the first and second cutting elements. The asymmetrically disposed cutting profile provides a first cutting surface portion disposed between a first lateral edge of the cutting profile and the first lateral side surface and a second cutting surface portion disposed between a second lateral edge of the cutting profile and the second lateral side surface. The first cutting surface portion comprises a first distance between the first lateral edge and the first lateral side surface that is at least twice as long as a second distance between the second lateral edge and the second lateral side surface. The cutting face of the first cutting element is arranged facing the cutting face of the second cutting element. The first cutting surface portion of the first cutting element is disposed opposite the cutting profile of the second cutting element and the first cutting surface portion of the second cutting element is disposed opposite the cutting profile of the first cutting element.