Metal working – Method of mechanical manufacture – Repairing
Patent
1985-12-02
1987-04-07
Meister, James M.
Metal working
Method of mechanical manufacture
Repairing
294265, 76101A, 76108R, 175383, 175413, F21C 1300, B23P 700
Patent
active
046549471
ABSTRACT:
Method and apparatus by which the cutting face of a drill bit is renewed. The drill bit has a cutting face comprised of a plurality of radially spaced apart stud assemblies, each received within a socket. A polycrystalline diamond disc forms one end of the stud assembly. The socket is in the form of a counterbore extending angularly into the bit body so that when a marginal end of the stud assembly is forced into a socket, a portion of the face of the diamond disc extends below the bottom of the bit body for engagement with the bottom of a borehole. A passageway communicates with the rear of the counterbore and extends back to a surface of the bit. Fluid pressure is effected within the passageway, thereby developing sufficient pressure differential across the stud assembly to cause the stud assembly to move respective to the socket. This action forces a marginal end of the stud assembly to move sufficiently respective to the socket so that the free marginal end of the stud assembly can be grasped by a tool and manipulated in a manner to bring an unused cutting edge of the diamond disc into operative cutting relationship respective to the bottom of the bit. The reoriented stud assembly is forced back onto seated relationship respective to the socket. The stud assembly includes a circumferentially extending seal means which cooperates with the socket interior with a piston-like action.
REFERENCES:
patent: 2348293 (1944-05-01), Hamer
patent: 2429967 (1947-10-01), Sorensen
patent: 2439692 (1948-04-01), McKay
patent: 2557619 (1951-06-01), Swart
patent: 2901222 (1959-08-01), Pease, Jr.
patent: 2958119 (1960-11-01), Stansfield
patent: 3075593 (1963-01-01), Holsing
patent: 3537539 (1970-11-01), Adcock
patent: 3858671 (1975-01-01), Kita et al.
patent: 4200159 (1980-08-01), Peschel et al.
patent: 4222446 (1980-09-01), Vasek
patent: 4553615 (1985-11-01), Grainger
Bates Marcus L.
Meister James M.
Perry W. Wesley
LandOfFree
Drill bit and method of renewing drill bit cutting face does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drill bit and method of renewing drill bit cutting face, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill bit and method of renewing drill bit cutting face will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1078278