Steerable earth boring device

Details Steerable earth boring device Steerable earth boring device

E - Fixed Constructions

21

B

255/12

E21B 7/08 (2006.01) E21B 7/06 (2006.01) E21B 7/26 (2006.01) E21B 10/44 (2006.01) E21B 17/10 (2006.01)

Patent

CA 2020781

ABSTRACT OF THE DISCLOSURE A steerable earth boring device comprises a compaction auger rotatably mounted to a housing at one end of the auger such that the compaction auger is substantially externally exposed. A steering tip is pivotably disposed at the other end of the compaction auger for providing steering control for the earth boring device. An internally housed steering mechanism is provided for pivoting the steering tip relative to the compaction auger while the auger is rotating. The steering mechanism includes a non-rotatable cam disposed within and pivotably connected to the housing and a follower rotatable with and pivotable relative to the compaction auger. The cam and follower contact at a bearing surface so that pivoting motion of the cam is transmitted to the rotatable follower. control member is connected between the follower and the steering tip, extending through the compaction auger, to transmit pivoting of the follower to pivoting of the steering tip.

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