Patent ID: 7341118

Claim:
A rotating dry drilling bit for drilling an annular bore hole into a body of rock and obtaining a core sample from said body of rock, said rotating dry drilling bit comprising: a. an annular steel body having a first annulus, a first inside diameter, a bottom end and a top end, said top end adapted for coupling with a rotating drill string, said drill string having an second annulus with a second inside diameter; b. a bit crown mounted to said annular steel body bottom end, wherein said bit crown has a top end and a bottom end and comprises: i. a third annulus having a third inside diameter, a bottom rim and a top rim, said third annulus extending through said bit crown, wherein the third annulus is co-axial with said first and second annuli and adapted to receive and pass said core sample to the annular steel body first annulus and hence to the drill string second annulus; ii. a bit head having a radial profile for rotatively cutting into said body of rock thereby forming the core sample and creating cuttings; iii. a radial outer face integral to and above said bit head, said radial outer face having a vertical profile and adapted for stabilizing the bit head against angular deviation and gauging said annular bore hole; iv. a plurality of radially extending channels formed therein and evenly spaced thereabout and adapted for carrying said cuttings away from the bit head; v. a plurality of radially extending cutting blades formed therein and evenly spaced thereabout wherein each one of said plurality of radially extending cutting blades is separated by one of said plurality of radially extending channels; and, c. a transition zone adapted for receiving the cuttings from the plurality of channels.