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Title: Guided Piercing Tool For Accurate Horizontal Boring
Author: Steven R. Kramer
Source: American Gas Association 1985
Year Published: 1985
Abstract: To minimize the high cosl of pavement removal and rcsloration, utilities prefer to bore under roadways or other paved surfaees. Existing tools are adequate for boring short distances up to 60 feet but are not sufficiently advanced to provide directional control for longer distances. In 1984, the Gas Research Institute (GRI) initiated two programs on a parallel path to evaluate various technologies applicable to guided horizontal boring. The ultimate objective of the program is to design and demonstrate a boring tool capable o drilling small-diameter holes up to 120 feei with a directional accuracy of one foot in all planes, first, the team of Vlaurer Engineering, Inc., and Illinois Institute of Technology

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