Patent ID: 8607900

Claim:
A downhole tool for engaging a first bottom hole assembly component and a second bottom hole assembly component for use in a wellbore having a wellbore axis, wherein the downhole tool is a tubular body comprising: a. a first end segment having a first end and a first end segment outer diameter; b. a second end segment having a second end and a second end segment outer diameter; c. a longitudinal axis extending from the first end segment to the second end segment; and d. a central cutting section, wherein the central cutting section extends longitudinally along the tubular body between the first end segment and the second end segment and away from the longitudinal axis, the central cutting section comprising: (i) a cutting section outer diameter greater than each end segment outer diameter; (ii) a plurality of helical blades, each helical blade comprising: 1. a first spiral angled section increasing in radius from the first end segment to a midpoint of the downhole tool, wherein the midpoint intersects at a right angle with the longitudinal axis; 2. a second spiral angled section increasing in radius from the second end segment to the midpoint of the downhole tool; and 3. a plurality of polydiamond cutter nodes disposed on portions of each spiral angled section proximate the midpoint, a plurality of high strength carbide cutting nodes disposed on each spiral angled section or on portions of the spiral angled sections; and (iii) a plurality of flute sections formed between each pair of helical blades, wherein each flute section has a flute depth that is greater than 0 percent and up to 15 percent less than the first end segment outer diameter, the second end segment outer diameter, or both; and when the downhole tool rotates about the longitudinal axis, the central cutting section bidirectionally reams the wellbore while allowing drill fluid to flow down an annulus of the tubular body while simultaneously allowing wellbore particulates to flow up and across the flute sections.