Patent ID: 8672032

Claim:
An oilfield pumping system, comprising: a recycled fluid subsystem enclosed from the atmosphere, the recycled fluid subsystem comprising a recycled fluid source, a recycled fluid supply pump and a high pressure pumping means; a non-recycled fluid subsystem, the non-recycled fluid subsystem comprising a non-recycled fluid source, a non-recycled fluid supply pump, a proppant blending subsystem, and a non-recycled fluid high pressure pump; a common mixing manifold; and, a wellhead connection; wherein the recycled fluid subsystem provides a recycled fluid to the common mixing manifold, the non-recycled fluid subsystem provides a non-recycled fluid to the common mixing manifold, and wherein a mixed fluid is delivered from the common mixing manifold to the wellhead connection; wherein the recycled fluid in the recycled fluid subsystem has a Reid vapor pressure of 14 kPa or greater.