Horizontal pipeline boring apparatus and method
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United States of America Patent
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-
May 24, 1994
Grant Date -
N/A
app pub date -
Aug 27, 1992
filing date -
Aug 27, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed is a horizontal pipeline boring apparatus and method for installing a pipeline section under a surface barrier such as a roadway or the like. A pilot bore is formed under the barrier. Next, a pipeline section bore large enough to received the pipeline section is formed long the path of the pilot bore using a pipeline boring head having a guide on the advancing side thereof. The guide is designed to engage the walls of the pilot bore and steer the pipeline boring head during cutting along the path of the pilot bore. Drilling liquids can be supplied to the boring operation through the pilot bore and discharged through the pipeline section.
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