... /8,7,75/8,95/8,103/4,133/8,143/8Double plug casing cement head: 5,51/2, 7, 95 ... /8,7,75/8,95/8,103/4,133/8,143/8Double plug casing cement head: 5,51/2, 7, 95 ... ,85/8×105/8,95/8×121/4,103/4×143/4,133/8×171/2,16×20,20×26,etc ... ,85/8×105/8,95/8× 121/4,103/4×143/4,133/8× 171/2,16×20,20×26,etc ...