Downhole vortex generator

Details Downhole vortex generator Downhole vortex generator

E - Fixed Constructions

21

B

255/25

E21B 17/18 (2006.01) E21B 21/12 (2006.01)

Patent

CA 1179669

Abstract of the Disclosure A drilling sub is provided in a drill string above a drill bit. The drilling sub includes a nozzle oriented to eject drilling fluid from said drill string into an annulus between the drill string and a well bore at an elevation above the drill bit with a horizontal velocity component tangential to said annulus to thereby impart a swirling motion to drilling fluid in the annulus. This creates a vortex extending down to the drill bit to enhance the cleaning of cuttings from the borehole and to reduce a pressure differential thereby increasing a penetration rate of the drill bit.

398051

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