rollers 1522 as shown in fig1 a and 15 bn the forming pads 1520 enter an opening of two retracted outlet members as illustrated in fig1 b the expanding rollers 1522 and forming pads 1520 are in a retracted position within retracted outlet members 1560 1562 the piston 1512 is stroked downwardly a small amount to move actuator cylinders 1516 downwardly a small amount next pistons 1518 are stroked downwardly causing expanding rollers 1522 to move along the inclined interior face of forming pads 1520 causing the pads to push outwardly against the interior walls of retracted outlet members 1560 1562 until the outlet members achieve a circular shape at that level simultaneously the outlet members are forced outwardly from the axis of the multiple outlet sub 1550 next the pistons 1518 are stroked upwardly thereby returning the expanding rollers 1522 to the positions as shown in fig1 c the piston 1512 is stroked another small distance downwardly thereby moving the forming pads 1520 further down into the outlet members 1560 1562 again the pistons 1518 are stroked downwardly to further expand the outlet members 1560 1562 outwardly and to circularize the outlets the process is continued until the positions of fig1 d and 17d are reached which illustrate the position of the forming pads 1520 and.