Patent ID: 7891432

Claim:
Apparatus for use in a well bore extending into an underground reservoir, the apparatus comprising: a base pipe; a packer configured to set upon an increase in pressure in the base pipe; an inflow control device configured to control flow of fluid into the base pipe from the underground reservoir, the inflow control device comprising a check valve that is movable from a closed position wherein flow of fluid into the base pipe from the underground reservoir is prevented to an open position wherein flow of fluid into the base pipe from the underground reservoir is allowed; a plug that seats in the apparatus to prevent fluid from flowing through the base pipe; wherein increasing the pressure inside the base pipe while the plug is seated and the check valve is in the closed position causes the packer to set; wherein decreasing the pressure in the base in se to an amount that is less than the pressure of the fluid in the underground reservoir causes the pressure of the fluid in the underground reservoir to move the check valve from the closed position to the open position.