Patent ID: 9273519
Filing Date: 2016-03-01
CPC Classification: E21B

Claim Text:
1. A downhole dual cutting reamer for use in a wellbore with a wellbore axis configured for engaging a first bottom hole assembly on a first end and a second bottom hole assembly on a second end, wherein the downhole dual cutting reamer comprises a tubular body having an annulus, wherein the tubular body comprises: a) a first end segment forming the first end having a first end segment outer diameter; b) a second end segment forming the second end having a second end segment outer diameter; c) a middle segment disposed between the first end segment and the second end segment with a middle segment outer diameter; d) a longitudinal axis extending from the first end through the middle segment to the second end; and e) a first cutting section extending longitudinally from the first end segment to the middle segment having a first cutting section outer diameter, the first cutting section comprising: f) a second cutting section extending longitudinally from the second end segment to the middle segment having a second cutting section outer diameter, the second cutting section comprising: g) at least one of: a plurality of thermally stable tungsten carbide cutting facings; a plurality of polydiamond cutting nodes; and a plurality of high strength carbide cutting nodes with raised surfaces disposed on the spiral angled sections; and h) as the downhole dual cutting reamer rotates about the longitudinal axis, each cutting member and the helical blades bidirectionally ream the wellbore while allowing drill fluid to flow down an annulus of the tubular body while simultaneously allowing wellbore particulates to flow up the wellbore and across the flutes.