METHOD OF DRILLING AND JET DRILLILNG SYSTEM
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United States of America Patent
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Issued Date -
Nov 1, 2012
app pub date -
Dec 22, 2010
filing date -
Dec 23, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of drilling into an object comprises providing a drill string in a borehole in the object, the borehole having at its bottom a borehole axis, the drill string comprising a borehole-centralized jet drill head at its lower end, the jet drill head having a drill axis, and comprising a jet nozzle; providing a stabilizer means for the drill string, the stabilizer means determining an inclination angle between the borehole axis and the drill axis; and generating a fluid jet at the jet nozzle, so as to deepen the borehole, wherein the drill string is rotated while deepening the borehole. Another system comprises a drill string with an jet drill head at its lower end, the drill head being provided with a jet nozzle, a stabilizer positioned above the jet drill head, the stabilizer contacting the borehole wall, and means for rotating the drill string.
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