Boring or penetrating the earth – Processes – Boring with specific fluid
Patent
1984-01-24
1985-04-23
Novosad, Stephen J.
Boring or penetrating the earth
Processes
Boring with specific fluid
175340, E21B 718
Patent
active
045124205
ABSTRACT:
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 hole 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 bore hole and to reduce a pressure differential thereby increasing a penetration rate of the drill bit.
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Adams Ladd M.
Hayatdavoudi Asadollah
Bui Thuy M.
Gill Industries, Inc.
Novosad Stephen J.
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