Simple Casing Heads

we are offering simple casing heads.
for satisfying the need of oil field drilling and reducing drilling cost,our company manufacture jytd-10 3/4*5 1/2-21 simple casing heads for many years experience.
　　usage:
connecting outer pipe thread directing to the surface casing pipe thread in the drilling operation.
the casing weight in addition to the surface casing can be hanged by the hanger.
improve the stability of the drilling well head assembly
　　　d、form enclosed spaces inside the casing string
e、provide export of pressure between the two layers of casing string, pumping fluid in well in case of any emergency and testing pressure.
f、perform special drilling operations, for example,remedial cementing from the side of the hole and hiting fluid into the side of the hole to balance the internal pressure at acid-fracturing.