Oil casing shows an important role

The surface casing is mainly used to hang and support the subsequent layers of casing through the casing head installed at the top. In addition, the shallow water layer on the surface is isolated from the complicated formation in front of the surface to protect the drilling from the pollution of the shallow water layer.

Intermediate casing, or technical casing, is used to isolate the strata with different formation pressures or complex formations that are prone to collapse and water leakage.

Production casing is used to protect the production layer, as well as the channel to transport oil and gas from the production layer to the surface.

Drilling liner is used to reduce the load of drilling rig and after casing during and after cementing, save casing and cement, and reduce cementing cost.

In the application of industry and field, oil casing shows important role and good performance.