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Shanxi Weigao Petroleum Drilling Tool Manufacturing Co., Ltd

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Sell  drill collar  


Specification
?89 ?105 ?121 ?146 ?159 ?165 ?178 ?203
It's made from rolled or forged AISI4145H chrome-molybdenum steel. The content of chemical composition and microelement is controlled effectively throughout the whole process.According to its different figures and materials, it can be divides into three types:
Type A (columnar): made from ordinary all...

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