Compensating ring for a down hole hammer

Details Compensating ring for a down hole hammer Compensating ring for a down hole hammer

1990-07-17

1992-02-04

Novosad, Stephen J.

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

175409, 175418, E21B 1036, E21B 1710

Patent

active

050852850

ABSTRACT:
The present invention relates to a sacrificial compensating ring for a down hole hammer having an outer sleeve, a drive sub and a drill bit, wherein the sacrificial compensating ring has an outer diameter greater than that of the outer sleeve and substantially the same as that of the drill bit and the sacrificial compensating ring being located between the outer sleeve and the drive sub.

REFERENCES:
patent: 2022101 (1935-11-01), Wright
patent: 3667817 (1972-06-01), Kellner
patent: 3923324 (1975-12-01), Cruickshank et al.
patent: 4108257 (1978-08-01), Sizer
patent: 4706764 (1987-11-01), Hughes

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