Petroleum engineer international - Vol. 60, No. 5 (May. 1988) ; 90 p.

Users guide to oil and gas valves -- Deep packerless completion maintains high capacity / T.R. Dever -- Steerable system cuts straight hole drilling costs 50% / Darrell Nordquist -- Simple method determines gas flow rate / William C. Barron -- Vendors provide wide array of MWD tools -- Why drill strings fail at the neutral point / Wilson C. Chin -- Drilling rigs designed for earthquakes / Jose Cardenas -- Program accelerates three-phase oil-gas separator design / M.S. Bizanti.

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