Method and apparatus for the production of underground pipelines
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United States of America Patent
Stats
-
Jun 30, 1992
Grant Date -
N/A
app pub date -
Oct 19, 1990
filing date -
Apr 27, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for producing an underground pipeline from an excavated hole uses a drill head with a suitable tool attached thereto. Loosened soil is transported out of the drilled tunnel with a transportation drum containing an internal spiral. The drum is supported by a roll devices fixed to outer pipes. Rotating movement is transmitted to the rotating drill head from the transportation drum which is driven by a motor. Cylinders push the whole system and force is transmitted by the outer pipes to the drill head. Guiding of the drill head is accomplished with fluid actuators. Attachment and removal of the drill tool is accomplished through a free hole in the transportation drum and a central hole in the drill head, and the free hole and central hole also allow observation of the drill tool and tunnel face during drilling.
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