Boring or penetrating the earth – Processes – Boring curved or redirected bores
Patent
1983-07-28
1984-12-04
Novosad, Stephen J.
Boring or penetrating the earth
Processes
Boring curved or redirected bores
175107, 175320, E21B 704
Patent
active
044858795
ABSTRACT:
The invention relates to a downhole motor having a housing of which the resistance against bending in a predetermined longitudinal plane is smaller than in any other longitudinal plane. Directional drilling of boreholes is carried out by rotating the drill string simultaneously with the rotation of the drill bit driven by the downhole motor over periods preceded and followed by selected periods during which the drill string is not rotated simultaneously with the rotation of the drill bit driven by the downhole motor.
REFERENCES:
patent: 4143722 (1979-03-01), Driver
patent: 4267893 (1981-05-01), Mannon
Feenstra Robijn
Kamp Anthony W.
Novosad Stephen J.
Shell Oil Company
Starinsky Michael
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