The Classification and Corrosion Resistant of API 5CT Casing Pipe

According to different using ways, API 5CT casing pipe can be divided into surface casing pipe, the intermediate casing, production casing and drilling casing.

Surface casing: it is mainly suspension and support subsequent various layers casing pipe through the top mounted casing head; and surface oil well casing pipe can isolate surface shallow-water layer and the front complex formation surface to protect the drilling well from the shallow layer of pollution. Intermediate pipe casing also called technical casing is used for different formation pressure or easy collapse and leakage of complex formation isolation. Production well casing is mainly used to protect production layer and will provide the channel for conveying the oil and natural gas from the production layer to the ground. Drill casing pipe is primarily applied to reduce the drilling load and casing load after casing and well cementation, save well casing and cement and reduce the cost of well cementation. So, API 5CT casing pipe shows important function and good performance in the field of industry and using.

API 5CT casing pipe corrosion resistant is mainly divided into: 1. Outer wall paint anticorrosion coating; 2. Inner wall paint anticorrosive coating; 3. Paint anticorrosive cooling coating. With the application of well casing in polar, marine and harsh petroleum drilling, the material and structure of the API 5CT casing pipe requires good nodes, excellent physical properties, stable chemical properties and wide range of temperature adaptation. If the requirement of oil well casing pipe can’t meet, it suggest that you should paint with anticorrosive coating to deal with the use of harsh environment.

Paint coating in the outer wall is used to reduce the erosion from the outside environment; Inner anticorrosive coating is mainly to reduce friction, corrosion of tube and increase the oil and natural gas throughput; Anti-corrosion insulation coating is used for transportation of oil and fuel oil and reduce the pipe distributing heat to the soil.

Henan Anson Steel Co., Ltd, professional API 5CT casing pipe and OCTG pipes supplier and exporter, is devoting to supplying high quality OCTG pipes for our customers. Welcome to visit our website: www.api-pipe.com and www.octgpipes.com