Removable anti-wear insert

Details Removable anti-wear insert Removable anti-wear insert

1980-09-08

1982-04-06

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175325, 308 4A, E21B 1062, E21B 1710, E21B 1712

Patent

active

043231314

ABSTRACT:
A removable anti-wear insert adapted to be mounted in the bore of a tool body, the insert being removable after wear with minimal damage to the tool body. The removable insert has a bore therein mounting an extractor sleeve, the sleeve having a threaded portion. Upon sufficient wear, the extractor sleeve threaded portion is exposed so that a set screw already mounted therein, or a separate bolt, can be rotated inwardly into engagement with the bottom of the tool body bore to force the insert upwardly out of the tool body bore. The head of the bolt threadedly mounted in the extractor sleeve shaft within the insert bore can be used as a point of leverage for pulling the insert out of the hole.

REFERENCES:
patent: 3389761 (1968-06-01), Ott
patent: 3603414 (1971-09-01), Stebley
patent: 3717209 (1973-02-01), Sheldon et al.
patent: 3771612 (1973-11-01), Adcock
patent: 3852874 (1974-12-01), Pearson
patent: 4190124 (1980-02-01), Terry
patent: 4199035 (1980-04-01), Thompson
patent: 4245709 (1981-01-01), Manuel

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