Drilling engineering

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This is the science and art of making a hole (otherwise called a well or wellbore) from the surface through a rock (or formation) to target potential hydrocarbon-bearing rock in the sub-surface. The general objective is to safely drill a useable hole that can give maximum production at minimum cost. Drilling operations account for over 80% of the total cost of a well. In many regions around the world especially the Gulf of Mexico, Gulf of Guinea and the North Sea, daily operational cost of an offshore rig range from $1 million to $1.5 million. This high cost has underlined the necessity for sound well planning and cost management to ensure that wells are drilled at lowest possible costs. Reference: SPE 0161