Geological drilling and oil drilling seamless steel pipe

Geological drilling and oil drilling seamless steel pipe
In order to investigate the structure of underground rock, groundwater, oil and gas mineral resources, drilling rigs are often used. Oil, natural gas developing can not be separated from drilling. Geological drilling oil drilling seamless steel pipe is the major drilling equipment, including the core of the outer tube, inner core pipe, casing, drill pipe and so on. Because drilling pipe need go deep into the depth of several kilometers formation work, working condition is extremely complex, drill withstand tension and compression, bending, twisting and uneven stress impact loads, etc., but also wore by the mud and rock, therefore, it requires the seamless steel pipe to have sufficient strength, hardness, wear resistance and toughness, steel pipe with "DZ" (geology Pinyin prefix) plus the number represents the yield point of steel, commonly used steel are 45MnB and 50Mn of DZ45;40Mn2 and 40Mn2Si of DZ50; 40Mn2Mo and 40MnVB of DZ55;40MnMoB of DZ60,27MnMoVB of DZ65. All steel to be delivered with heat treatment state.