Mud pulser

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E - Fixed Constructions

21

B

E21B 47/18 (2006.01)

Patent

CA 2552025

A method and apparatus incorporate a MWD/LWD mud pulser orifice for reducing erosion on the discharge side of the orifice, the mud pulser orifice having an upstream conduit, a poppet mounted in the upstream conduit reciprocal with respect to the orifice, the orifice is fixed to the upstream conduit having a flow restriction aperture and a discharge side, and a downstream conduit fixed to the discharge side of the orifice has an inner diameter wall. The flow restriction aperture has a center hole plugged by the poppet when the poppet is moved forth into an engaged position, and axial slots integral with and distal from the center hole. The discharge side of the orifice has a smooth transition taper from the center hole to the inner diameter wall in distal regions (excluding the regions of the axial slots).

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