Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1975-06-11
1977-02-08
Leppink, James A.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175336, E21B 936
Patent
active
040067882
ABSTRACT:
A rock bit for recovering core samples is described, along with variations for drilling oil wells or the like. In each of these embodiments a plurality of diamond cutters are mounted on the bit body for cutting rock by a shearing action. Each diamond cutter is in the form of a thin diamond plate bonded to a carbide slug that is inserted into the bit body. Means are also provided for limiting the depth of penetration of the diamond cutters into the rock formation being drilled preferably in the form of rolling cone cutters having a plurality of carbide insects protruding from their surfaces. The protrusion of the carbide inserts from the surface of the cutter cones is less than the length of the diamond plate. This limits the depth that the diamond can penetrate in the rock and inhibits damage. Typically the diamond cutters are mounted for cutting one portion of the hole area by shearing action and the rolling cone cutters are mounted for cutting another portion of its area by chipping-crushing action.
REFERENCES:
patent: 1506119 (1924-08-01), Hansen
patent: 2049543 (1936-08-01), Kammerer
patent: 2399372 (1946-04-01), Metzger et al.
patent: 2520517 (1950-08-01), Taylor
patent: 2901222 (1959-08-01), Pease, Jr.
patent: 3055443 (1962-09-01), Edwards
patent: 3066749 (1962-12-01), Hildebrandt
patent: 3106973 (1963-10-01), Christensen
patent: 3174564 (1965-03-01), Morlan
patent: 3269469 (1966-08-01), Kelly, Jr.
Leppink James A.
Smith International Inc.
LandOfFree
Diamond cutter rock bit with penetration limiting does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Diamond cutter rock bit with penetration limiting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diamond cutter rock bit with penetration limiting will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1209334