Gravity based fluid trap
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United States of America Patent
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Oct 18, 2016
Grant Date -
Oct 31, 2013
app pub date -
Jan 4, 2012
filing date -
Jan 14, 2011
priority date (Note) -
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Abstract
A method to be used when performing drilling in a well bore and a device for performing the method are disclosed. The method includes positioning in the well bore a drill string comprising at least two pipe conduits, an upper end, and a lower end comprising a drilling tool, thereby forming an outer annulus between the well bore wall and the drill string. A well bore section comprising at least one u-shaped section is drilled. A first fluid with a first density is fed into the outer annulus above the u-shaped section, and a second fluid with a second density is provided within the drill string and around the tool, where the first density is larger than the second density.
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