Classification of Oil Casing

Oil casing according to the different ways can be divided into: surface casing, the intermediate casing, the production casing. the well casing. The main surface of the sleeve is: through the top of the casing head installed to support the suspension and subsequent layers of the casing. There is a shallow surface layer and the front portion of the complex formation isolation, protection against drilling shallow layer of pollution. Intermediate casing or a casing technology, is used to the different strata formation pressure or can be easily collapse and easy to leak complex formation isolation. Production casing layer is used to protect the production, as well as the oil and gas transportation from the production floor to the ground provided by the channel. After drilling liner is used to reduce the time and casing cementing, rig loads and loads of the sleeve after the post-production, saving casing and cement, to reduce the cost of cementing. Using industries and fields, the oil casing to show the important role and good performance.