below it in the screen liner assembly 32 sleeve 144 possesses annular seals 164 166 168 and 170 at the top of sleeve 144 lies inwardly beveled surface 172 below which is downward facing shoulder 174 between annular seals 166 and 168 apertures 176 and 178 communicate with gravel ports 152 and 154 when aligned therewith at the lowest extremity of sleeve 144 are located a ring of collet fingers 180 having radially outward extending lower ends second anchor tool 190 is located below polished nipple 182 at the top of anchor tool 190 an outwardly beveled surface leads to annular recess 192 below which is upward facing annular shoulder 194 below which an outwardly beveled surface leads to annular recess 196 followed by an inwardly beveled surface leading to cylindrical surface 198 which is of substantially the same inner diameter as blank pipe 200 gravel screen 202 is disposed across the lower producing formation or zone of interest gravel screens 122 and 202 are fore shortened in the drawings herein and actually may be a number of feet in length the length being determined by the thickness of the producing formation to be gravel packed all of which is evident to those skilled in the art it being further evident that the gravel screens may have perforations as shown or may employ wire wrapped slots to form the desired operations another length of blank pipe 204 is attached below gravel screen 202 and the lowest end of the pipe is capped with a float shoe 206 it should be noted that.