Hammer for use in a bore hole and apparatus for use therewith
OwnerMelvyn S. J. Ennisinventor
Life of this patent
Estimating the term…
Abstract
Apparatus for drilling a bore hole comprising a hammer and a dual walled drill tube. The hammer comprises a reciprocable piston, fluid flow control device for directing fluid under pressure to the hammer to reciprocally drive the piston, and cutting device coupled to the hammer which rotate upon reciprocation of the hammer to cut the bore hole. Rachets are coupled to the cutting device to permit rotation of the cutting means in one direction only and to prevent rotation in an opposite direction. A portion of the fluid under pressure is diverted to entrain and direct particulate material to the surface of the bore hole.
Claims18
Apparatus for drilling a bore hole comprising a hammer and a dual walled drill tube, said hammer being mounted to one end of said tube, said hammer comprising a hammer piston reciprocably coupled to said hammer, fluid flow control means for directing fluid under pressure to said hammer to reciprocably drive said piston, cutting means rotatably coupled to said hammer, said cutting means rotating upon reciprocation of said hammer to cut said bore hole, thereby forming particulate material in said bore hole, ratchet means operatively coupled to said cutting means for permitting rotation of said cutting means in one direction only and preventing rotation in an opposite direction, and means for diverting a portion of said fluid under pressure to entrain and direct said particulate material to the surface of the bore hole.
Dependencies are inferred from the claim text.