Method and apparatus for directional drilling
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United States of America Patent
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Sep 6, 2011
Grant Date -
Jul 12, 2007
app pub date -
Dec 11, 2003
filing date -
Dec 11, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is directed at a pullhead/reamer for use in digging a hole in the ground; comprising a first end (22) shaped to receive a mandrel struts, connecting the first end to the second end, the struts defining a set of open flutes (48) therewithin; and a set of slurry jets (50); wherein when the pullhead/reamer is in use, the set of slurry jets release a pressurized liquid to mix with the ground producing a slurry which enters the pullhead/reamer via the open flutes.
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