Asymmetric insert for inner row of an earth boring cutter

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element

Patent

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Details

175410, E21B 908

Patent

active

040869733

ABSTRACT:
An asymmetric insert has a formation contacting crest thereby decreasing the loading on the insert and increasing the lifetime of the cutter. The insert has a shape prior to assembly in the cutter that includes a base integrally joined to an asymmetric head. The base is mounted in a socket in the cutter body. The head projects from the surface of the cutter and includes a crest positioned to contact the formations with substantially its entire length.

REFERENCES:
patent: 2579268 (1951-12-01), Malherbe
patent: 3388757 (1968-06-01), Fittinger
patent: 3389761 (1968-06-01), Ott
patent: 3442342 (1969-05-01), McElya et al.
patent: 3599737 (1971-08-01), Fischer
patent: 3734213 (1973-05-01), Goodfellow
patent: 3858670 (1975-01-01), Ott

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