THE "HOLY GRAIL" of the single-diameter well has come a giant step closer with Enventure Global Technology's announcement of successfully expanding 3 successive liners with uniform ID. Using its trademarked "MonoDiameter" technology, Enventure drilled the milestone, which it called a field-appraisal well, in Oklahoma during April. Each of the 3 consecutive liners were expanded to a uniform 10.4-in. ID, the company reported. "MonoDiameter is no longer a concept," said Enventure senior vice president Rick Fontova. "It's a reality." Enventure played the role of operator, contracting all services, including site preparation, cement, fluids, drilling rig, explained Enventure drilling manager Jerry Fritsch. Drilling, he said, proceeded as with as normal well, the goal being to run 3 successive single-diameter liner under a variety of conditions. Although no hydrocarbon-bearing sands were encountered, nor expected, Enventure used a conventional BOP stack with one annular and one double ram. "It was a real-life, well," he said.
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