Earth boring drill bit with shell supporting an external drillin

Metal tools and implements – making – Blank or process – Drill

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

175417, B21K 502, E21B 1052

Patent

active

058786341

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: 4398952 (1983-08-01), Drake
patent: 4454922 (1984-06-01), Jamison et al.
patent: 4919221 (1990-04-01), Pascale
patent: 5000273 (1991-03-01), Horton et al.
patent: 5101692 (1992-04-01), Simpson
patent: 5150636 (1992-09-01), Hill
patent: 5322139 (1994-06-01), Rose et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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.

Rate now

     

Profile ID: LFUS-PAI-O-1311028

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.