Straight-hole drilling device improves performance in tectonically active region

A straight-hole drilling device has improved wellbore quality and reduced drilling time on a gas well in the Acambuco block of Northwestern Argentina.The 28, 22, 16, and 121/4-in. hole sections were drilled to 4,700 m in 161 days, 30 days less than the best offset well performance and 49 days less than the regional average, saving the operator about $1.5 million in rig costs.Wellbore quality was significantly better than in previous wells as shown by comparing wellbore displacement. At 2,300 m depth, the displacement was less than 20 m with use of the straight-hole drilling device as compared to almost 150 m in the closest offset well that was drilled with other traditional bottomhole ass...

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