Geological drilling and oil drilling seamless steel pipe: To explore the underground rock, underground water, oil, gas and mineral resources, the use of drilling wells. Oil, natural gas and even less from wells, geological drilling.
Oil drilling seamless steel pipe is the main drilling equipment, including core outer tube, core tube, casing, drill pipe and so on. As the drilling pipe to work deep into the depth of several kilometers formation, working conditions is extremely complex, drill pipe under tensile, compressive, bending, twisting and uneven stress such as impact loading, but also by the mud, rock wear, therefore, required pipe must have sufficient strength, hardness, wear resistance and toughness, steel pipe with "DZ" (geology Pinyin prefix) plus a representative number, said yield point of steel, used steel has DZ45 of 45MnB, 50Mn; DZ50 of 40Mn2, 40Mn2Si; DZ55 of 40Mn2Mo, 40MnVB; DZ60 of 40MnMoB, DZ65 the 27MnMoVB. Steel have to heat treatment delivery.
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