Petroleum engineer international - Vol. 59, No. 3 (Mar. 1987) ; 66 p.

U.S. deep drilling costs down for fourth straight year / Rich McNally -- Improved method helps sidetrack cased well bores / W.W. Cagle -- Status report: corrosion resistant alloys / S. Mark Wilhelm -- PEI softalk and hardware / Wesley W. Eckles -- How to temporarily shut in producing wells / Dwayne E. Godsey -- How to get the most for your money from drill stem tests / James C. Erdle -- World rig locator.

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