Boring or penetrating the earth – Bit or bit element – Magnetized or with magnet
Patent
1979-11-05
1981-03-03
Novosad, Stephen J.
Boring or penetrating the earth
Bit or bit element
Magnetized or with magnet
175409, 175410, E21B 1046
Patent
active
042535336
ABSTRACT:
A diamond studded insert drag bit is disclosed having a multiplicity of individual diamond insert cutter blanks inserted in the face of the bit. The diamond insert blanks are so positioned to maximize penetration of the bit in a borehole. The bit further includes one or more wear pads adjacent the multiplicity of diamond insert cutter blanks, the wear pads serving to channel the flow of drilling mud emanating from fluid passages formed in the face of the bit. The wear pads seal off a portion of the borehole bottom thereby directing hydraulic fluid across the face and over each of the strategically positioned diamond cutter blanks.
REFERENCES:
patent: 2644672 (1953-07-01), Mathews
patent: 3322218 (1967-05-01), Hildebrandt
patent: 3693735 (1972-09-01), Cortes
patent: 3765493 (1973-10-01), Rosar et al.
patent: 3825080 (1974-07-01), Short
patent: 4128136 (1978-12-01), Generoux
Novosad Stephen J.
Smith International Inc.
Upton Robert G.
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