Flow pulsing apparatus with axially movable valve

Details Flow pulsing apparatus with axially movable valve Flow pulsing apparatus with axially movable valve

E - Fixed Constructions

21

B

255/25

E21B 4/02 (2006.01)

Patent

CA 1285551

FLOW PULSING APPARATUS WITH AXIALLY MOVABLE VALVE ABSTRACT OF THE DISCLOSURE Flow pulsing apparatus is adapted to be connected in a drill string above a drill bit. The apparatus includes a housing providing a passage for a flow of drilling fluid toward the bit. Turbine means in the housing are rotated about an axis by the flow of drilling fluid. Valve means operated by the turbine means periodically restrict the flow through the passage to create pulsations in the flow and a cyclical water hammer effect to vibrate the housing and the drill bit during use. Cam means are provided for effecting reciprocation of the valve along the axis of rotation of the turbine means to effect the periodic restriction of flow. CROSS-REFERENCE TO RELATED PATENTS This case is related to my Canadian Patent No. 1,217,759 issued Feb. 7, 1987.

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