Earth boring – well treating – and oil field chemistry – Well treating – Contains inorganic component other than water or clay
Reexamination Certificate
2007-04-27
2009-11-17
Gulakowski, Randy (Department: 1796)
Earth boring, well treating, and oil field chemistry
Well treating
Contains inorganic component other than water or clay
C166S305100
Reexamination Certificate
active
07618927
ABSTRACT:
A method of increasing a rate of penetration when drilling as compared to drilling with a baseline drilling fluid comprising an API-grade barite weighting agent and having a given sag, settling rate, density, flow rate, and pressure drop through a wellbore, comprising: circulating a drilling fluid comprising a base fluid and a micronized weighting agent through the wellbore; wherein the drilling fluid is characterized as having an equivalent density, an equivalent or lower settling rate, and an equivalent or lower sag than the baseline drilling fluid; wherein the circulating is at a higher flow rate than the baseline drilling fluid flow rate; and wherein the circulating results in an equivalent or lower pressure drop through the wellbore.
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Bradbury Andrew
Massam Jarrod
Oakley Doug
Reid Todd
Gulakowski Randy
M-I L.L.C.
Osha • Liang LLP
Toscano Alicia M
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