valve is closed upon further elevation of the stinger relative to the liner fingers 205 are carried upwardly by the upper end of sleeve 235 until dogs 205 snap into groove 207 closing the outer foot valve and latching it in that position that is the position of the foot valves shown in fig3 it will be understood from the above description that latch 221 remains connected in all positions of the apparatus as shown in fig1 3 latch 221 merely provides a convenient means for assembly of the apparatus since the liner including the screen may be several hundred feet long it is not run into the well as a unit initially the foot valve assembly is run into the well then liner sections and finally the packer with the packer mandrel suitably suspended in the well e g by slips in the rotary table or other surface equipment the several hundred feet of stinger are run into the well inside the liner then the dual pipe is run in and as the dual pipe is connected to the packer mandrel by j slot 65 automatic latch 221 engages the lower end of the stinger with the foot valves thereafter the circulation joint 23 is connected to the dual pipe and the whole assembly is lowered to the desired level with screen 160 opposite casing perforations 156 or if the liner is run in open hole the screen is placed at the level of the producting formation since the automatic latch is connected while its parts are down hole it is constructed so as to engage without manual guidance it comprises upstanding pin 251 threadedly connected at its lower end to collet mandrel 225 pin 251 fits telescopically into socket 253 threadedly connected to.