... Product Description Spring float collar and float shoeSpecification: 31/2,4,41/2,5,51/2,7,95/8,103/4,133 ... 103/4,133/8Drill pipe cement head: 27/8,31/2,5,51/2We can also design and product special cement ... 103/4,133/8Drill pipe cement head: 27/8,31/2,5,51/2We can also design and product special cement ... 10 (Dg250),12(Dg300)Stage-cementing EquipmentSpecification:5,5 1/2,7,9 5/8,13 3/8,etc.External Casing ...