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Patent
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G01F 11/24 (2006.01) E21B 43/267 (2006.01) E21B 47/10 (2006.01) G01F 13/00 (2006.01) G05D 11/13 (2006.01)
Patent
CA 1296250
ABSTRACT An apparatus for dispensing an additive into a stream of well proppant includes a sealed housing containing a first chamber, a second chamber, and an additive dispenser, operable connected to a motor. The upper chamber is adapted to contain the additive, and the lower chamber communicated with the pressurized well proppant stream. The additive dispensing means is disposed between the upper chamber and the lower chamber. Pressure equalizing tubes within said housing extend from the upper chamber through the additive dispenser to the lower chamber to equalize the fluid pressure existing in the lower chamber with the fluid pressure existing in the upper chamber during the dispensing of the additive from the upper chamber to the lower chamber. In the preferred embodiment the additive dispenser consists of a screw or auger disposed within an auger ring, and the additive flows through the additive dispenser to the lower chamber under the force of gravity. Where the additive consists of radioactive sand used as a tracer for well logging purposes, the apparatus may be provided with an electrical power end control circuit to remotely control the dispensing of radioactive sand.
594493
Harvey Robert D.
Kirby Eades Gale Baker
LandOfFree
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