Rotatable end deflector for abrasive waterjet drill

Details Rotatable end deflector for abrasive waterjet drill Rotatable end deflector for abrasive waterjet drill

E - Fixed Constructions

21

B

255/11

E21B 7/18 (2006.01)

Patent

CA 1264732

ROTATABLE END DEFLECTOR FOR ABRASIVE WATER JET DRILL Abstract of the Disclosure A rotatable end deflector for an abrasive water jet drill is provided. The end deflector includes two wear resistant plates which direct portions of the water jet in opposite forward directions. Preferably, the abrasive water jet drill includes a source of high pressure water and a high pressure water outlet from which a stream of water is expelled. A venturi device is provided adjacent the water outlet for creating a vacuum. A feed device feeds an abrasive particular material to the venturi device so that the abrasive material is entrained in the stream of water. Thereafter, the stream of water is collimated in a rotating tube which produces a rotating cylindrical water jet which is then deflected before it impinges on the rock to drill the rock. The abrasive material is preferably sand and the tube including the deflector is easily replaceable.

543913

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