Apparatus, systems, and methods for fracturing a geological formation

摘要

The present disclosure relates, according to some embodiments, to apparatus, systems, and methods of fracturing a geological structure including the application of kinetic energy (e.g., from high velocity frack fluid) to a subterranean structure. In some embodiments, the present disclosure relates to apparatus, systems, and methods for delivery of high velocity fluid to a well using a down hole valve and/or throttling system. The present disclosure relates to apparatus, systems, and methods of generating pressure using accumulators (e.g., high pressure accumulators) at the surface of a well.

主权项

1. A system for directing fluid in a subterranean structure, the system comprising:
(a) a well in fluid communication with the subterranean structure; (b) a well liner inside the well; (c) a fracking string inside the well liner, the fracking string comprising a central channel for carrying the fluid; (d) a configurable slider sleeve for directing flow of the fluid; (e) a first orifice located near the slider sleeve, a pressure drop across the first orifice being determined by the flow of the fluid; and (f) an expandable first spring for moving the slider sleeve when the pressure drop across the first orifice falls to or below a threshold level, the movement of the slider sleeve enabling the fluid to enter an annular space between the fracking string and the well liner, (g) a second spring, the second spring being compressed upon the movement of the slider sleeve enabling the fluid to enter the annular space between the fracking string and the well liner.