Guiding device for percussion drills

Details Guiding device for percussion drills Guiding device for percussion drills

1982-03-02

1984-04-10

Purser, Ernest R.

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

175408, 308 4A, E21B 1710

Patent

active

044415656

ABSTRACT:
A guiding means in rock drilling for guiding a percussion drill string (10) comprises a guide sleeve (17). For purposes of ensuring free rotation between the drill string (10) and the guide sleeve (17) the latter is bound by shape to the drill string at its one end during drilling as well as during withdrawal of the drill string (10).

REFERENCES:
patent: Re23860 (1954-08-01), Burris
patent: 2563038 (1951-08-01), Irwin
patent: 2835473 (1958-05-01), Burris
patent: 2956783 (1960-10-01), Landstedt
patent: 3277972 (1966-10-01), Lagerstrom
patent: 3313364 (1967-04-01), Binkley
patent: 4220213 (1980-09-01), Hamilton

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