Oil Well Pipe

At present, China's domestic market share of oil well pipe has been more than 80%, and 2 years in a row as net export products. In regard to the development of varieties, many domestic enterprises innovation, not only produced according to the requirement of API standard K, N, C and P steel casing, also according to user requirements developed with independent intellectual property rights of the series of casing, such as tianjin steel tube company developed a TP series the collapse resistance of casing, casing corrosion resistance, resistance to high temperature thermal recovery Wells with casing, ultra deep well with button and special gas tightness casing pipe, including TPl30TT high collapse casing its collapsing strength reached more than 167 mpa. TPll0TSS high collapse casing corrosion resistance in 5% sodium chloride, acetic acid, 5% of oxidation corrosion in the solution, 720 hours not broken; TP140V casing under the well depth of 6936 meters (the recent record will be broken). A NC 3 cr co2 corrosion resistance casing has batch sent to tarim oilfield well use. Baosteel, chengdu seamless also have developed their own products. Although Chinese seamless steel tube industry in the oil well pipe has made remarkable achievements, but in some high-end product development there is no pass, such as 13 cr, super 13 cr steel inclusion and control the content of S and P (S less than 10 PPM, P is less than 15 parts per million (PPM), the performance of the heat treatment control, and thread processing of quality control still exist a series of problems, such as flexible tubing, the development of the expansion casing is still blank.