Technique for drilling straight bore holes in the earth
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United States of America Patent
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Dec 7, 2010
Grant Date -
Sep 21, 2006
app pub date -
Mar 16, 2005
filing date -
Mar 16, 2005
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A stabilizer assembly is at least 12′ long and preferably at least 14′ long and is used to drill a straight bore hole in the earth. A central passage through the assembly closely follows a centerline as may be determined by measuring the wall thickness of the tube at a variety of locations in a single plane. At least three stabilizing sections are integral with the tube and include alternating ribs and flutes. Hardbanding on the ribs is ground down to tolerances with a grinding machine or face plate lathe having centers sufficient to receive the 12′ long stabilizer assembly.
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