Drilling fluid containing microspheres and use thereof
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United States of America Patent
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Jun 14, 2005
Grant Date -
Feb 19, 2004
app pub date -
Aug 14, 2002
filing date -
Aug 14, 2002
priority date (Note) -
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Abstract
The present invention provides a drilling fluid composition and a method of drilling comprising a drilling fluid, which may be oil- or water-based, and a composite microsphere component. The invention drilling fluid composition advantageously reduces the density of a conventional fluid, reduces costs associated with pumping and overcomes problems associated with conventional gas-injection processes. The invention uses conventional drilling and pumping equipment, requires no sea-floor based pumps and may be easily pressure-controlled to maintain the pressure of the fluid.
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