Apparatus for drilling straight portion of a deviated hole

Details Apparatus for drilling straight portion of a deviated hole Apparatus for drilling straight portion of a deviated hole

E - Fixed Constructions

21

B

255/6

E21B 7/08 (2006.01) E21B 7/06 (2006.01) E21B 7/10 (2006.01) E21B 17/20 (2006.01)

Patent

CA 1173822

APPARATUS FOR DRILLING STRAIGHT PORTION OF A DEVIATED HOLE Abstract of the Disclosure A guide for drilling a straight section of a bore hole de- flected from the vertical. The apparatus comprises either a normally straight or a curved-straight tubular member which has a plurality of generally circumferential cuts disposed along the length of the guide. The cuts allow the guide to be bent sufficiently to enter and traverse a short radius curve and then return to its normal configuration for guiding the drilling of the straight portion of the deflected bore hole. A clutch mechanism disposed in the drill guide permits engagement of the guide by the drill string for orientation of the guide.

386214

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