CONTROL SYSTEM AND APPARATUS FOR DELIVERY OF A NON-AQUEOUS FRACTURING FLUID

摘要

A system is described that provides for proppant to be blended into a liquefied gas fluid stream with an eductor to produce a proppant slurry which is effectively controlled by the use of a control valve system and associated PLC controller. This system ensures allowing for operation of the system at various static pressures and keeps the proppant completely fluidized throughout the fracing operation.

主权项

1. A method of controlling a proppant concentration in a fracturing fluid that is utilized in stimulation of an underground formation, comprising:
supplying a motive fluid flow of liquefied gas at pressure between about 150 to 400 psig to at least one eductor, wherein the liquefied gas is mixed with the proppant or proppant slurry in the eductor to form a fracturing fluid, wherein the pressurized proppant reservoir is disposed in a position to supply the proppant slurry to the at least one eductor; varying the pad pressure in the pressurized proppant reservoir from about −30 to 40 psi; and further varying a proppant control valve disposed between the eductor and the pressurized proppant reservoir to control the proppant concentration in a range from about 0.1 to 10 lbs/gal of proppant in the fracturing fluid.