Straight hole drilling method and assembly

Details Straight hole drilling method and assembly Straight hole drilling method and assembly

1988-12-27

1989-10-17

Novosad, Stephen J.

Boring or penetrating the earth

Processes

175323, 175325, E21B 700, E21B 1722

Patent

active

048740454

ABSTRACT:
A drilling assembly comprises a matched bit and stabilizer in which the maximum outer diameter of the bit and stabilizer have been measured and machined to be within predetermined tolerances. The maximum stabilizer diameter is in the range of 0.003-0.025 inches in diameter less than the measured bit O.D. Preferably, the maximum stabilizer diameter is in the range of 0.005-0.010 inches in diameter less than the measured bit O.D. A series of stabilizer assemblies are provided, including a single stabilizer assembly, a double stabilizer assembly, a hole straightening assembly, a large bit O.D. drilling assembly and a small bit O.D. drilling assembly.

REFERENCES:
patent: 3250578 (1966-05-01), Lubbes
patent: 3338069 (1967-08-01), Ortloff
patent: 3419094 (1968-12-01), Bobo
patent: 3575247 (1971-04-01), Feenstra
patent: 3784238 (1974-01-01), Chance et al.
patent: 3833077 (1974-09-01), Lavallee
patent: 3916998 (1975-11-01), Bass, Jr. et al.
patent: 4285407 (1981-08-01), Samford
patent: 4403668 (1983-09-01), Ramsey
patent: 4465222 (1984-08-01), Hester
patent: 4667751 (1987-05-01), Geczy et al.
patent: 4729438 (1988-03-01), Walker et al.
patent: 4760889 (1988-08-01), Dudman

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