Patent ID: 7537067

Claim:
A rotary claw bit comprising: a base plate having multiple lobes, said multiple lobes having upper surfaces located in the same plane and lower surfaces located in the same plane, each of said lobes having substantially parallel side walls and an outer end wall, said side walls of adjacent lobes being spaced apart at an angle to provide a space between said adjacent lobes; a pilot bit extending downwardly from a center of said base plate; semi-circular channels being formed at an intersection of adjacent lobes with cylindrical pipes positioned therein and attached thereto, each of said cylindrical pipes adapted to receive water therethrough; a plurality of bullet tooth attachment blocks attached to the lower surface of each of said lobes, one bullet tooth attachment block being attached to the lower surface of each of said lobes adjacent said pilot bit and one bullet tooth attachment block attached to the lower surface of each of said lobes adjacent said outer end wall thereof; a plurality of bullet teeth, each of said bullet teeth being removably attached within one of said attachment blocks, each of said bullet teeth having a hardened tip, each of said bullet teeth having a longitudinal axis that is at an angle to the plane of said lower surfaces of said lobes, the longitudinal axes of adjacent bullet teeth on each of said lobes being located substantially within the same plane and substantially parallel to each other, said pilot bit having a tip that is located below the hardened tips of said bullet teeth; a tapered neck attached to an upper surface of said base plate and adapted to be connected to a drilling string; said rotary claw bit having an axis of rotation about which it rotates in a counterclockwise or clockwise direction of rotation during use, said axis of rotation passing through the center of said base plate, said pilot bit and said tapered neck each having a longitudinal axis located on said axis of rotation.