Down-hole motor and method for directional drilling of...

Details Down-hole motor and method for directional drilling of... Down-hole motor and method for directional drilling of...

E - Fixed Constructions

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B

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E21B 4/02 (2006.01) E21B 4/20 (2006.01) E21B 7/02 (2006.01) E21B 7/06 (2006.01)

Patent

CA 1205796

A B S T R A C T DOWN-HOLE MOTOR AND METHOD FOR DIRECTIONAL DRILLING OF BOREHOLES The invention relates to a down-hole motor having a housing of which the resistance against bending in a prede- termined 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 down-hole 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 down-hole motor. (Figures 1-2)

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