Down hole multiple piston tools operated by pulse generation tools and methods for drilling
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United States of America Patent
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Dec 4, 2012
Grant Date -
Mar 18, 2010
app pub date -
Jan 30, 2008
filing date -
Jan 30, 2007
priority date (Note) -
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Abstract
An underground drilling method where drilling fluid pulsing down hole tool is combined with a multiple in series pistons down hole tool to provide vigorous vibrations in the drill string and deliver vibrating energy to the drill bit to increase penetration rates and reduce friction between the drill string and the hole. One example method and apparatus shown can operate a simple percussive down hole mud hammer.
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