The role of oil casing in oil drilling

The oil casing is a steel pipe used to support the wall of oil and gas wells to ensure the normal operation of the whole well during and after the drilling process. The role of casing at different locations is different. Let’s take a look at the role of oil casing.

Surface casing: install casing head at the top, hang and support subsequent layers of casing through casing head; Isolate the surface shallow water layer and the shallow complex bottom layer, so that the fresh water layer is not polluted by drilling fluid.

API 5CT OIL CASING PIPES

Intermediate casing (technical casing): isolate layers with different formation pressures or complex formations that are prone to collapse and leakage.

Production casing: protect the production layer and provide a channel for oil and gas to flow from the production layer to the ground.

Drilling liner: reduce the load of the drilling rig when running casing and the load of the casing head after cementing, save a lot of casing and cement, and reduce the cost of cementing.

API 5CT PLS1 casing steel pipes

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