The casing cement-head with double plugs (called as cement-head ) is a common cementing tool used as wellhead unit in all kinds of cementing operation. Comparing to cement-head with single plug, it owns longer cement-head body, and upper rubber plug and lower rubber plug can be put in at same time. The tool owns some advantages such as simple construction, easy operation, high pressure resistant, manifold in common use, flexible in connecting. Especially, the lever type indicator can shows whether rubber plug goes through double plugs cement-head to enter casing so that operator can determine easily.Type ST35-140 ST35-178 ST-244 ST16-340 Size 139.7(51/2") φ 177.8(7") φ 244.5(95/8") 339.7(13 3/8") Max.working pressure 35Mpa 35Mpa 35Mpa 20Mpa Casing coupling thread 51/2" LTC/BTC 7" LTC/BTC 95/8"LTC/BTC 13 3/8" LTC/BTC Manifold interface 2" union 2"union 2" union 2"union ID of plug container (mm) φ 125 φ 160 φ 225 φ 320 Length of plug container(mm) 450 460 560 560 Overall length 1886 1972 1701 2210
