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OCTG and categories

OCTG is used primarily for oil and gas well drilling and oil and gas transportation. It includes oil drill pipe, casing and tubing. Oil drill pipes are mainly used for connecting collars and passing drills and drilling power. Oil pipes are mainly used for drilling and completion on the wall support, to ensure the drilling process and after completion of the whole normal operation of wells.   Main bottom pipeline transportation of oil and gas to the surface.
lifeline of oil casing is to maintain a well run. Due to the different geological conditions, underground stress complex, tension, compression, bending, torsional stresses acting on the pipe body, itself coming from the high quality requirements.   Once the casing is damaged for some reason, may cause the entire well cut, even discarded.
according to the strength of the steel itself are different grades of steel casing, J55, K55 、 N80 、 L80, C90, T95, P110, Q125, V150, etc. Jing Kuang, depth difference grade used is different. In corrosive environments also require casing with corrosion resistance in itself. In complicated geological conditions place also called casing with collapsing properties.


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