Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
Patent
1981-09-21
1983-08-02
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Magnetized or with magnet
175393, 175411, 76108A, E21B 1046, E21B 1060
Patent
active
043960774
ABSTRACT:
A drill bit for connection on a drill string has a hollow tubular body with an end cutting face provided with a tungsten carbide coated surface and an exterior peripheral stabilizer surface with cylindrical sintered carbide inserts positioned therein. Nozzle passages extend from the interior of the bit body through the cutting face for receiving a removable and interchangeable nozzle member therein. The cutting face has a plurality of recesses therein which receive, by an interference fit, a plurality of cutting elements of the type known as STRATAPAX, consisting of a cylindrical stud having an angular supporting surface with a cutting disc bonded thereon consisting of sintered carbide having a cutting surface of polycrystalline diamond. The recesses in the cutting face have milled offset recesses adjacent to the edges thereof which are sized and positioned to permit the cutting discs to be partially recessed and to restrain the cutting elements from rotation during use. The cutting face is coated with tungsten carbide to a thickness of 0.012-0.040 in. by means of a high-velocity, high-temperature plasma coating process after the cutting elements are assembled in the bit body. This process coats the steel bit body with tungsten carbide without coating or otherwise affecting the cutting inserts. The coating is metallurgically bonded to the steel bit body and protects against wear during drilling for periods of several hundred hours.
REFERENCES:
patent: 3286334 (1966-11-01), Hay
patent: 3298451 (1967-01-01), Eckel et al.
patent: 4246977 (1981-01-01), Allen
patent: 4265324 (1981-05-01), Morris et al.
patent: 4285410 (1981-08-01), Sanford
Falk Joseph
Mosely Neal J.
Novosad Stephen J.
Strata Bit Corporation
LandOfFree
Drill bit with carbide coated 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 with carbide coated cutting face, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill bit with carbide coated cutting face will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-479876