Oil special pipe is mainly used for oil and gas well drilling and oil and gas transmission. It includes petroleum drill pipe, oil casing, tubing. Oil drill pipe is mainly used to connect the drill collar and bit and drilling. After the oil casing pipe is mainly used for drilling and well completion on the wall of support, to ensure the drilling process and the normal running of the whole well after completion. Pipe leading to the well at the bottom of the oil and gas transmission to the ground.

OD  WEIGHT  Wall Thickness  ID     DN COLLARGRADELENGTH

139.7 (5-1/2)

20.85(0.244) 23.09(15.50) 25.32(17.00) 29.79(20.00) 34.26(23.00)

6.20(0.244) 6.98(0.275) 7.72(0.304) 9.17(0.361) 10.54(0.415)

127.3(5.012) 125.7(4.950) 124.3(4.892) 121.4(4.778) 118.6(4.670)

124.1(4.887) 122.6(4.825) 121.1(4.767) 118.2(4.653) 115.4(4.545)

153.7 (6.050)

j55 n80 p110

8m-12m (2602-39.4

Oil casing is to maintain the lifeblood of any oil Wells. Due to the different geological conditions, underground stress state is complex, tension, pressure, bending, torsion stress combination ACTS on the pipe body, which raised higher requirement about the quality of the casing itself. Damage due to some reason, once the casing itself could lead to the production of the well, or even scrapped.