Patent ID: 7621329

Claim:
A method of forming and delivering a treatment fluid into a wellbore, the method comprising the steps of: (a) pumping a first fluid comprising a first aqueous solution with a first positive-displacement pump; (b) pumping a second fluid comprising a second aqueous solution with a second positive-displacement pump; (c) merging at least the first and second fluids to form a treatment fluid, wherein the step of merging is after the steps of pumping the first and second fluids; and then (d) directing the treatment fluid into a wellbore; wherein: (i) the treatment fluid comprises a merged concentration of a particulate; (ii) the first fluid comprises a first concentration of the particulate that is substantially higher than the merged concentration of the particulate; (iii) the second fluid comprises a second concentration of the particulate that is substantially lower than the merged concentration of the particulate; and (iv) the first fluid is pumped at a substantially lower average bulk fluid velocity than the second fluid is pumped and (v) the first, second, and treatment fluids are handled as fluid streams.