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Title: Guided Piercing Tools, Turning Into Reality- Part II
Author: George Ragula
Source: American Gas Association 2001
Year Published: 2001
Abstract: Due to ever increasing costs in the areas of excavation, restoration, permitting, and traffic control combined with more stringent paving requirements imposed by the local jurisdictions having authority, the emphasis on trenchless technology has become increasingly important. Trenchless technology has been identified by the gas industry as a major area of focus from a new technology development perspective. Piercing tools (one type of trenchless technology) have been commercially available for many years now. Conventional piercing tools have been routinely used by distribution field crews with great success but have been limited to short distances (40 feet maximum). Performance was further restricted by soil type, water table interference and underground obstacles - primarily rocks. It is not uncommon to lose such tools in areas inaccessible to excavation (i.e. under roads).

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