Impact block assembly for percussion drilling apparatus

Details Impact block assembly for percussion drilling apparatus Impact block assembly for percussion drilling apparatus

1992-06-22

1993-12-07

Bagnell, David J.

Boring or penetrating the earth

Below-ground impact members

Fluid-operated

175 14, 175 93, 175414, F21B 406, F21B 414

Patent

active

052676226

ABSTRACT:
In a percussion drilling apparatus, an impact block assembly is provided for sequentially driving drill rods into a subterranean formation, the impact block assembly including an impact block member aligned with one or more rows of drill rods and a combustion operated piston is arranged above the impact block assembly for sequentially driving each of the impact members downwardly into engagement with the aligned drill rods.

REFERENCES:
patent: 2400853 (1946-05-01), Stilley
patent: 4883133 (1989-11-01), Fletcher et al.
patent: 5088568 (1992-02-01), Simuni

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