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API 7-1 Drilling hlua li qub
Laum txoj hlua nres cov kua dej los ntawm kev ntws los ntawm txoj hlua tho feem ntau yog tias lub laum ncaws nrog lub ntsis tawm hauv qab.LANDRILL tuaj yeem muab cov txiaj ntsig zoo Tag Nrho qhov kev nyab xeeb valve (FOSV), Kelly valve, Sab hauv blowout Preventer (IBOP), Tso rau hauv kos valve , ntab valve.
Room 703 Building B, Greenland center, Hi-tech development Zone Xi'an, Suav teb
86-13609153141
