Drill bit

Details Drill bit Drill bit

1981-09-21

1984-04-17

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175410, E21B 1046

Patent

active

044429096

ABSTRACT:
A drill bit for connection on a drill string has a hollow tubular body with an end cutting face 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.

REFERENCES:
patent: 4164329 (1979-08-01), Higby
patent: 4244432 (1981-01-01), Rowley et al.
patent: 4265324 (1981-05-01), Morris et al.
patent: 4323130 (1982-04-01), Dennis
patent: 4351401 (1982-09-01), Fielder

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