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 system for controlling proppant concentration in a fracturing fluid that is utilized in stimulation of an underground, comprising:
providing a proppant reservoir having a proppant or proppant slurry therein and disposed in a position to supply the proppant or proppant slurry to an eductor; providing an eductor to receive a motive fluid flow of liquefied gas at pressure between 150 and 450 psig, wherein the eductor is disposed below the proppant reservoir and forms a fracturing fluid containing proppant at the outlet of the eductor upon receiving the proppant or proppant slurry from the proppant reservoir; and providing a proppant control valve disposed between the proppant reservoir and the eductor, wherein the pad pressure in the proppant reservoir is varied from about −30 to 40 psi to attain a concentration range from about 0.1 to 10 lbs/gal of proppant in the fracturing fluid.