Fluid driven drilling motor and system

Details Fluid driven drilling motor and system Fluid driven drilling motor and system

E - Fixed Constructions

21

B

E21B 4/02 (2006.01)

Patent

CA 2549739

A fluid driven drilling motor and system includes a flex shaft between the rotor and a cylindrical flow collar. The end of the flow collar opposite from the flex shaft has a bore in fluid communication with a drill bit. Ramped apertures are formed in the side wall of the flow collar. The ramped apertures are in fluid communication with the bore. Drilling fluid flowing under pressure down past the flex shaft is directed and drawn into the ramped apertures along a fluid flow path which spirals downwardly and radially inwardly of the flow collar so as to then flow into the bore. The pressure loss associated. with drawing the drilling fluid down to the drill bit is thereby minimized.

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