high speed of drill collars

High Speed Of Oil Field Drill Collars

Our high speed of oil field drill collars are made of 4145H MOD. We has been certified by API Q1 Quality Management System,License of Using Official API 7-1 Monogram. We follow the Quality Policies'' Keep improving,Produce perfect machinery;Pursue excellence,Create First-Class Brand.'' 4145H MOD drill collars are widely welcomed by more than twenty countries as following:United States,Canada,Australia,France,Russia,Middle East,Brazil and Singapore etc. Our Nationl leve II lab controls the quality.

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