E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/18 (2006.01) B24C 1/04 (2006.01) B24C 5/04 (2006.01) E21B 10/60 (2006.01) E21B 41/00 (2006.01)
Patent
CA 2542413
Nozzle unit (1) for generating an abrasive jet, which nozzle unit (1) comprises: a first nozzle (3) connected to a pressurized carrier fluid supply (2); a mixing chamber (5) in which the first nozzle (3) discharges; a second nozzle (6) connected to the mixing chamber (5); and an abrasive particle inlet (4) discharging in the mixing chamber (5); wherein the proportion of the cross sectional area of the first nozzle opening (A1) and the cross sectional area of the second nozzle opening (A2) is in a range of 0.50-1Ø
Unité (1) à buses destinée à produire un jet abrasif, ladite unité (1) comportant une première buse (3) raccordée à une alimentation (2) en fluide porteur sous pression, une chambre de mélange (5) dans laquelle la première buse (3) évacue le fluide, une seconde buse (6) raccordée à la chambre de mélange (5) et un orifice d'introduction (4) de particules abrasives débouchant dans la chambre de mélange (5), la proportion entre l'aire de section transversale du passage (A¿1?) de la première buse et l'aire de section transversale du passage (A¿2?) de la seconde buse étant de l'ordre de 0,50 à 1,0.
Shell Canada Limited
Smart & Biggar
LandOfFree
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