... 51/2, 7, 95/8,103/4,133/8Drill pipe cement head: 27/8,31/2,5,51/2We can also design ... and product special cement head according to users requirement.Drill pipe ... 51/2, 7, 95/8,103/4,133/8Drill pipe cement head: 27/8,31/2,5,51/2We can also design ... are only supplied with two-stage cementing tools.The drill pipe plugs and hollow plugs used in drilling liner cementing ...