Rigid drill mandrell

Details Rigid drill mandrell Rigid drill mandrell

E - Fixed Constructions

21

B

255/28

E21B 17/10 (2006.01) B23B 31/24 (2006.01) B23B 31/36 (2006.01)

Patent

CA 1174231

Abstract of the Disclosure A stabilizing mechanism for guiding drill direction of a flexible drill string when drilling the straight portion of a deviated well bore. The stabilizing mechanism comprises a tu- bular mandrel adapted for connection between the flexible drill string and a drill bit. The mandrel has at least two, reduced diameter areas spaced apart and disposed axially along its length. A non-rotating type stabilizer sleeve is positioned on each of the reduced diameter areas. Bearing means is provided at each end of each of the sleeves to reduce wear. The mandrel is capable of traversing a short radius curve of a deviated wall.

392393

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