مشغلو أبراج حفر النفط والغاز

• Inspect derricks, or order their inspection, prior to being raised or lowered.
• Inspect derricks for flaws, and clean and oil derricks to maintain proper working conditions.
• Control the viscosity and weight of the drilling fluid.

بيانات المهام مقتبسة من O*NET® 29.1 Database التابعة لـ USDOL/ETA، وتُستخدم بموجب CC BY 4.0.