Patent ID: 8739887

Claim:
A method for regulating the injection of a stimulation fluid into a subterranean formation, comprising: arranging a base pipe within the subterranean formation, the base pipe having a check valve assembly arranged therewith, the check valve assembly having a valve body defining an inlet, one or more discharge ports, and a cylindrical passageway fluidly communicating the inlet with the one or more discharge ports, the check valve assembly further having a piston movably disposed within the passageway; magnetically-attracting the piston into engagement with a valve body seat defined in the passageway such that the piston is biased to a closed configuration that prevents fluid communication between the inlet and the one or more discharge ports; and injecting the stimulation fluid into the base pipe at a rate sufficient to induce the piston to move from the closed configuration to an open configuration where the piston engages a valve cap seat defined in a valve cap coupled to the valve body and defining an opening therein, the opening providing fluid communication between the cylindrical passageway and the subterranean formation, and wherein the stimulation fluid is injected at a rate sufficient to induce the piston to engage the opening and form a mechanical seal therewith.