Reduction of the frictional coefficient in a borehole by the use of vibration
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United States of America Patent
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May 24, 1983
Grant Date -
N/A
app pub date -
Nov 28, 1980
filing date -
Nov 28, 1980
priority date (Note) -
Expired
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Abstract
A deviated borehole is drilled with a rotary drilling technique in which the drill string is vibrated at a suitable frequency and amplitude to reduce the friction of the drill string against the lower side of the borehole and to promote the free movement of the drill string therein.
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