1.certified by API-ISO 2.good quality,low price 3.good after-sales service 4.adequate stocks,fast delivery 5.IADC 447 12 1/2" IADC 447 Kingdream rock bit international HAS series for oil well...

1.Reliable bearing system 2.Fast drilling rate 3..size rang from3"1/2-26" 4.Certification: API & ISO9001 5.delivery on time Type6"(152mm),  6 1/2"(165mm),  8 1/2"(215.9mm), 9 1/2"(241.3mm), 12 1/4"(311mm) ,  13...

HQ diamond core bit for oil drill good quality and long working life rensonable price     We are Hejian Deris Petroleum drilling equipment Co., Ltd Drilling Supplies Marketing Dept. specializes in drill bits, drill pipe, Mud pump and stablizers for water well, oil...

1.certified by API-ISO 2.good quality,low price 3.good after-sales service 4.adequate stocks,fast delivery 5.IADC 437 IADC 437 9 1/2"Kingdream TCI rock drill bit sizes HAT series for water well...

1.certified by API-ISO 2.good quality,low price 3.good after-sales service 4.adequate stocks,fast delivery 5.IADC 447-837 API Kingdream Brand New Rolling bearing steel tooth rock rock bits...

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