TEHRAN August 5 (Shana)--A superheavy drilling rig has been moved to Yaran oil field to accelerate drilling operations in this field shared with neighboring Iraq. Nasrollah Abbasi, director of Yaran oil field drilling in the National Iranian Drilling Company, said the Fath-60 rig is being added to Fath-28 and Fath-92 rigs already spudding appraisal ...