Cheng source Cangzhou Pipe Co., Ltd. (Liu; 13231792162QQ2943809190) to produce oil casing P110 N80 J55 oil casing oil casing pipe geological oil casing pipe geological formation of annual inventory turnover has been more than 8500 tons, more than 800 kinds of specifications. Annual sales volume of over billion. The sale of products implementing national standards for all areas of construction, mining, textile, electric power, boilers, machinery, military and other. With a good reputation, quality products, a strong, low price reputation of the various provinces, municipalities, autonomous regions, municipalities, the product won user dependent. API5CT oil casing can be divided into seamless and welded steel pipe, welded steel pipe mainly refers to straight seam steel pipe, large diameter oil pipe is generally straight seam submerged arc welded steel pipe. Mainly used to transport oil, natural gas, gas, water and other liquids, gases. The main application of the product mainly countries in the Middle East, Europe and America. api5ct oil casing can be divided according to the length of the different R-1, R-2 and R-3 three specifications. The main material is mainly made of B, X42, X46, X56, X65, X70, etc. In extreme high temperatures and pressures, oil casing pipe material has its own unique natural advantage. api5ct oil casing products manufactured from raw materials to the front to be flattening test, tensile test, inspection and testing related 27MnCrV impact test, tensile test and so is the production of new steel grade TP110T oil pipe sleeve, conventional production TP110T grade petroleum steel pipe sleeve is 29CrMo44 and 26CrMo4. Both, 27MnCrV contains less Mo element, can greatly reduce the production cost with respect to rear. However, the use of hardened austenitic normal production process there are obvious after tempering brittleness 27MnCrV, resulting in low toughness and unstable. OCTG mainly used to transport oil and gas well drilling and oil and gas. It includes oil drilling pipe, casing, tubing pump. Oil drill pipe and drill collars used to connect and pass drilling power drill. Oil casing is mainly used to support the rear of the wellbore during drilling and completion, and after completion to ensure the normal operation of the entire drilling wells. The main draw tube bottom oil wells, gas transmission to the ground. Oil well casing is run to maintain a lifeline. Due to different geological conditions, underground complex stress state, tension and compression, bending, torsional stress acting on the combined effect of the tube, which is the quality of the casing itself put forward higher requirements. Once the casing itself is damaged for some reason, could lead to the entire production wells, or even scrapped. According to the strength of the steel casing itself can be divided into different steel grades, namely J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. Well conditions, depth of different steel grades used are different. In corrosive environments also require casing itself has corrosion resistance. In complex geological conditions where the sleeve has also asked collapsing performance. Oil Casing is a large-diameter pipe, played the role of fixed oil and gas wells or borehole wall. Cannula is inserted into the wellbore, the cemented to prevent borehole spaced formation and borehole collapse and to ensure that drilling mud circulation, in order to facilitate drilling mining. Sleeves are used to support the oil and gas well borehole pipe, drilling process and to ensure the normal operation of the entire post-completion wells. Each well depending on the depth of drilling and geological conditions, to use several layers of casing. After cementing the casing to be used to go down, it tubing, drill pipe is different, can not re-use, one-time consumption of materials. Therefore, the casing consumption accounted for more than 70% of all the oil well pipe. Casing can be divided according to usage: catheter, surface casing, casing and production casing. Oil casing steel grade: H40, J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. End of the tube processing forms: short round thread, long round thread, buttress thread, special deduction. Mainly used for oil well drilling support on the wall after drilling and completion, and after completion to ensure the normal operation of the entire drilling wells.