Seamless Steel Pipe

　　OCTG pipe refers to Oil Country Tubular Goods,a collection of rolled metal products, more commonly known as Drill pipe, Casing and Tubing which are manufactured according to API Specification and are used both onshore and offshore in petroleum industry. This severe corrosion environment requires the pipe with high corrosion resistance and crush resistance especially for geological complex areas, the performance of coating has higher requirements. According to the specific application of anti-corrosion coating and the different corrosion environment, it can be divided into drilling pipe internal coating, oil casing internal coating and interrnal/outside coating of oil transport pipe. 　　The high temperature and high pressure resistance test of petroleum casing pipe coating is a standard laboratory method developed with reference to the standard NACE TM 0185, which can be used to test the quality of coating on steel pipe. This experiment is carried out in the autoclave under certain c...

    OCTG pipe refers to Oil Country Tubular Goods, a collection of rolled metal products, more commonly known as drill pipe, casing and tubing which are manufactured according to API specification. It used both onshore and offshoreiIn petroleum industry.     Drill pipe is a seamless tube that rotates the drill bit and circulates drilling fluid. It is hollow to allow drilling fluid to be pumped down the hole through the bit and back up the annulus. The annulus of an oil well is the space between any piping tubing or casing and the piping, tubing or casing immediately surrounding it. The presence of an annulus gives the ability to circulate fluid in the well. Drill pipe is subjected to high torque by drilling, axial tension by its dead weight and internal pressure by purging of drilling fluid.     Tubing is the pipe that goes inside the casing pipe. This is the pipe that the oil itself will eventually make its way out of. The most simplistic of the OCTG f...