Rotary impact well drilling system and method

Details Rotary impact well drilling system and method Rotary impact well drilling system and method

2006-08-29

2006-08-29

Bagnell, David (Department: 3672)

Boring or penetrating the earth

Below-ground impact members

Fluid-operated

C175S057000, C173S091000

Reexamination Certificate

active

07096980

ABSTRACT:
A system and method for applying rotary percussive impacts to a drill bit, according to which an anvil is connected to the bit and a hammer is driven in one direction in the anvil when the bit encounters a relatively large load. Energy is stored during the movement of the hammer in the one direction and the stored energy is released to drive the hammer in a direction opposite the first direction to produce the percussive impacts.

REFERENCES:
patent: 3307640 (1967-03-01), Cleary
patent: 3316986 (1967-05-01), Orr
patent: 5957220 (1999-09-01), Coffman et al.
patent: 6047778 (2000-04-01), Coffman et al.
patent: 6742609 (2004-06-01), Gillis et al.

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