Classification and anti-corrosion of oil casing

Oil casing can be roughly divided into one and surface casing according to different usage methods. Second, the middle casing. Third, the production of the casing. Fourth. Drilling casing. The surface casing is mainly: the casing head installed on the top and is used to suspend and support the subsequent layers of casing. Another is to isolate the surface shallow water layer from the complex strata in the front to protect the drilling from contamination of the shallow water layer. Intermediate casing, or technical casing, is used to isolate layers with different formation pressures or complex formations that are prone to collapse and leaks. Production casing is used to protect the production formation and provide the passageways to transport oil and gas from the production formation to the surface. The drilling liner is used to reduce the load of the drilling rig and the load after the casing during casing and after cementing, saving casing and cement, and reducing the cost of cementing. In the use of industries and fields, petroleum casing shows an important role and good performance.

The anti-corrosion of petroleum casing is mainly divided into 1. Brush the anti-corrosion coating on the outer wall. Second, brush the anti-corrosion coating on the inner wall. 3. Brush on the anti-corrosion and cooling coating. With the use of oil casing in the polar and marine etc., harsh oil extraction industry. The material and structure of the oil casing are required to have good nodal properties, excellent physical properties, stable chemical properties, and a wide temperature adaptation range. If the oil casing can't do that, it should be given an anti-corrosion coating. to help him cope with the harsh environment of use. A coating on the outer wall is used to reduce external erosion. The anti-corrosion coating on the inner wall is to reduce friction, reduces the corrosion in the pipe, and improves the transportation of oil. The anti-corrosion and thermal insulation coating are used to transport crude oil and fuel oil and reduce the heat emitted by the pipeline to the soil.