Boring or penetrating the earth – Bit or bit element – Impact or percussion type
Patent
1993-12-22
1995-08-15
Neuder, William P.
Boring or penetrating the earth
Bit or bit element
Impact or percussion type
E21B 1052
Patent
active
054411211
ABSTRACT:
A method for making an earth boring drill bit which includes an outer shell having an external surface adapted to carry cutting elements and a unitary shank and bit core which is fitted into the outer shell. The shell and bit core are threadably engaged with one another or are interferingly engaged. The shell and bit core may be welded, secured with brazing alloys or with high temperature adhesives. In one embodiment, a ridge formed on the shank is received in a groove formed on an interior surface of the shell to prevent relative rotational movement of the shank and shell during drilling. In another embodiment, the shell is formed using matrix infiltration techniques. After the shell is formed,it is heated to braze cutters thereto. While still hot from the brazing process, the shell and shank are fitted together. After cooling the shell contracts to form heat shrink connection between the shell and the shank.
REFERENCES:
patent: 1922559 (1933-08-01), Strobel
patent: 2039494 (1936-05-01), Sanderson
patent: 4083415 (1978-04-01), Kita et al.
patent: 4454922 (1984-06-01), Jamison et al.
patent: 4919221 (1990-04-01), Pascale
patent: 5322139 (1994-06-01), Rose et al.
Baker Hughes Inc.
Neuder William P.
LandOfFree
Earth boring drill bit with shell supporting an external drillin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Earth boring drill bit with shell supporting an external drillin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Earth boring drill bit with shell supporting an external drillin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2175912