Patent ID: 6619391
Filing Date: 2003-09-16
Classification: E21B

Abstract:
A method of selectively sealing and opening a well annulus between a well tubing string and a well wall, said method comprising of steps of:(a) assembling an annulus barrier apparatus having a piston element in threaded assembly with a tubular mandrel, a tubular tool body rotationally circumscribing said mandrel, said piston having a first axial position along said mandrel that is non-rotationally meshed with said tool body and a second axial position that is rotatively independent of said tool body and, a radially expansible slip and seal mechanism assembled about said tool body to be operatively engaged by a fluid pressure ram assembly; (b) assembling said annulus barrier apparatus with a well tubing string; (c) suspending said tubing string within a well to position said annulus barrier apparatus at a predetermined level; and (d) increasing fluid pressure within said tubing string to translate said ram assembly into operative engagement with said slip and seal mechanism whereby said slip and seal assembly engages a wall of said well.