Breakable washer earth boring bit

Details Breakable washer earth boring bit Breakable washer earth boring bit

2005-05-17

2005-05-17

Bagnell, David (Department: 3672)

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

C175S325500, C411S156000, C411S160000, C411S531000

Reexamination Certificate

active

06892832

ABSTRACT:
A drill bit is assembled to the makeup end of a drill string by means of a breakable washer comprising a ring-shaped body having an inner diameter and an outer diameter. A radially extending first surface of the ring-shaped body is planar and substantially perpendicular to a centerline axis through the body. A second radially extending surface has an angle with reference to the first surface that results in a radially diverging configuration.

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