B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
233/22, 166/24
B01D 45/14 (2006.01) B04B 5/12 (2006.01) C02F 11/12 (2006.01) E21B 43/267 (2006.01)
Patent
CA 1093520
ABSTRACT OF THE DISCLOSURE A concentrator or mixture separator usable, for exam- ple, for significantly increasing the amount of proppant in a formation-?acturing foam is disclosed. In a particular embodiment the concentrator or separator is comprised of a substantially horizontally extending vessel, a rotor rotatably mounted inside the vessel on a shaft and a motor for rotating the shaft. The vessel has a slurry intake at a forward end and a concentrated slurry discharge and proppant carrier dis- charge at the rearward end. Mounted on the shaft near the slurry intake is a cylindrical stabilizer which is for impart- ing a spin to the incoming slurry. Also mounted on the shaft, downstream of the stabilizer is an intake impeller assembly which can be comprised of a plurality of annular intake im- pellers, a discharge assembly which can be comprised of a plur- ality of annular discharge impellers, and a connecting hous- ing therebetween. A substantially proppant-free carrier is drawn into the intake impellers and axially discharged there- by into a central channel while the concentrated slurry is axially forced by the higher intake pressure along an outer channel forward between the rotors and the vessel. The dis- charge impellers discharge the carrier and the concentrated slurry is discharged out the slurry discharge. In a particularly preferred embodiment, the intake impeller assembly has a plurality of intake channels which spiral inwardly in the direction of impeller rotation so that an approximated free-vortex flow pattern is obtained and so that the fluid being drawn into the impeller must have a tan- gential velocity component and be travelling faster than the rotor.
315419
Black Donald S.
Dunsmuir George H.
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