Downhole motor and method for directional drilling of boreholes

Boring or penetrating the earth – Processes – Boring curved or redirected bores

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Details

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

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