Method for drilling under rivers and other obstacles

Details Method for drilling under rivers and other obstacles Method for drilling under rivers and other obstacles

E - Fixed Constructions

21

B

E21B 47/022 (2006.01)

Patent

CA 2300550

A method of drilling under barriers (rivers, highways and the like) is set. The horizontal drilling system mounts a guidance tool on the end of the drill string just behind the drill bit. The guidance tool includes a pair of right angle accelero meters and a 3-axis mounted gyro. The gyro furnishes data in a plane at right angles to the z-axis. This defines four data streams to the CPU enabling determination of drill bit location and pathway.

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