Formation fracturing and gravel packing tool

Claim 1

Apparatus for completing a subterranean well, the apparatus comprising: a packer settable within a wellbore of the well; a screen attached to the packer; and a service tool positioned at least partially within the packer, the service tool having a slurry delivery flow passage for delivering a slurry to an annulus formed generally radially between the screen and the wellbore, a fluid return flow passage for returning a fluid portion of the slurry to the earth's surface after the fluid portion has flowed inwardly through the screen, a flow blocking member selectively positionable relative to a flow port of the return flow passage in a first position in which fluid flow is prevented through the flow port and a second position in which fluid flow is permitted through the flow port, a sensor capable of sensing fluid pressure within the return flow passage, a processor interconnected to the sensor, the processor transmitting a signal in response to a level of fluid pressure indicated by the sensor, an engagement member, and an electromechanical device interconnected to the processor, the device displacing the engagement member in response to the processor signal to engage the blocking member and thereby cause displacement of the blocking member from the first position to the second position.