Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure
Patent
1981-10-06
1983-05-31
Novosad, Stephen J.
Boring or penetrating the earth
With tool shaft detail
Helix or helically arranged structure
175325, 175329, 308 4A, E21B 1044, E21B 1056, E21B 1722
Patent
active
043856691
ABSTRACT:
This invention is directed to a stabilizer-reamer which is useful in drilling oil wells and holes in mineral formations. The stabilizer-reamer extends the life of the drill bit by maintaining the diameter of the hole to original specifications. The stabilizer-reamer comprises a stabilizer portion which reduces excessive lateral movement of the drill bit, a reamer portion which reams away undersize portions of the walls of the hole and a rock chip grinding portion which breaks down oversize rock chips in the hole.
REFERENCES:
patent: 3180439 (1965-04-01), Deely
patent: 3712392 (1973-01-01), Gorgendiere
patent: 3833077 (1974-09-01), Lavallee
patent: 3885637 (1975-05-01), Veprintsev et al.
patent: 3978993 (1976-09-01), Olson et al.
patent: 4043611 (1977-08-01), Wallace
patent: 4273159 (1981-06-01), Bolton et al.
Falk Joseph
Novosad Stephen J.
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