An extremely long bore helped assure successful completion of a segment of the Hampton Roads Crossing project, a natural-gas pipeline for Virginia Natural Gas (VGN) that links Norfolk to Newport News. "This is the longest pullback of 24-in pipe that we've ever undertaken," says Mike Vidomski, site supervisor with Mears Group Inc. It allowed installation of 7,357-ft of a 24-in. steel pipeline under the Elizabeth River. Mears used a 660,000-Ib drilling rig to complete the pilot hole, achieving a depth of 110 ft over the length of the crossing. Because local conditions presented challenges to traditional land-based steering methods, Mears teamed with the general contractor, Weeks Marine Inc., to equip a barge with a mobile coil set-up.
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机译：极长的钻孔确保了汉普顿道路交叉项目的一部分成功完成，该项目是维吉尼亚天然气（VGN）的天然气管道，该管道将诺福克与纽波特纽斯联系起来。 Mears Group Inc.现场主管Mike Vidomski说：“这是我们进行过的最长的24英寸管道回撤。它允许安装7,357英尺的24英寸管道。伊丽莎白河下的钢铁管道。米尔斯使用了660,000-Ib的钻机完成了导向孔，在穿越的整个长度上达到了110英尺的深度。由于当地条件给传统的陆上操纵方法带来了挑战，Mears与总承包商Weeks Marine Inc.合作，为驳船配备了可移动的线圈装置。
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