| drill bits and PDC bits which used on the oilfield and water well, the sizes: 5 7/8"--17 1/2"(both insert drill bits and steel tooth bit) 2.Drill pipe Accord with API 5D latest edition .Has been awarded the certificate for compliance with standard ISO 9001-2008 GB/T 19001-2008. Steel Grade: E-75, X-95, G-105, S-135 O. D. Range from 2"(60.3mm) to 6"(168.3mm) Type: Internal Upset, External Upset, Internal and External Upset. With competitive price and high quality. If you are interested in our products ,please feel free to contact with us by hidden website:www.drilling-tool.com | | | |
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