47 fig1 and 2 the lower end is deflected laterally outwardly into the lateral casing 18 the concave shape of the deflector surface 47 will help to keep the seal assembly centered as it is deflected toward the lateral casing 18 this is particularly significant if the protective sleeve 147 is not being used because it helps reduce the likelihood that the seal assembly will engage the edges of the window 14 which can inflict damage to the seals 142 where the protective sleeve 147 is being used it will protect the seals 142 from jagged edges of the window 14 even if the seal assembly 56 does happen to engage the edges of the window 14 thereafter as the tubing strings 51 and 52 continue to be run into the well the seal assembly 56 and the protective sleeve 147 will move further outwardly into the lateral bore 18 with reference to fig1 and 19 the seal assembly 56 and protective sleeve 147 will eventually enter the tubular extension 222 on the packer 26 in the lateral casing 18 until the shoulder 227 on the protective sleeve engages the shoulder 226 on the extension 222 the engagement of the shoulders 226 and 227 will prevent further movement of the protective sleeve 147 into the extension 222 at this point as shown in fig1 the ends 182 of the collet fingers 181 on the protective sleeve 147 are disposed within the cylindrical release surface 223 on the extension 222 the.