Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent
1996-01-11
1998-03-31
Neuder, William P.
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
175425, E21B 1008
Patent
active
057327831
ABSTRACT:
A drill bit comprises a main body part having a shank for connection to a drill string, an end face, an internal passage for supplying drilling fluid to the end face, a number of blades extending from the end face outwardly and longitudinally of the central axis of rotation of the bit, and a number of cutters mounted on each said blade. Each blade comprises a central metal core at least partly surrounded by solid infiltrated matrix material. A method of manufacturing such a drill bit includes the steps of providing a metal mandrel having said shank and internal passage, and providing on the mandrel, so as to be supported by it, a number of blade cores each having a portion extending outwardly and longitudinally of the central axis of the mandrel, casting infiltrated matrix material around at least a part of each core and around at least a part of the mandrel to form the blades, and then removing portions of the cores so as to detach each core from support by the mandrel to leave within each blade a core which is substantially wholly supported by the surrounding matrix material.
REFERENCES:
patent: 4368788 (1983-01-01), Drake
patent: 4478297 (1984-10-01), Radtke
patent: 4667756 (1987-05-01), King et al.
patent: 5425288 (1995-06-01), Evans
patent: 5518077 (1996-05-01), Blackman et al.
Caraway Douglas
Evans Stephen M.
Murdock Andrew
Truax David
Camco Drilling Group Limited of Hycalog
Neuder William P.
LandOfFree
In or relating to rotary drill bits does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with In or relating to rotary drill bits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and In or relating to rotary drill bits will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-44528