Earth boring – well treating – and oil field chemistry – Earth boring – Contains organic component
Reexamination Certificate
2006-07-25
2006-07-25
Sellers, Robert (Department: 1712)
Earth boring, well treating, and oil field chemistry
Earth boring
Contains organic component
C507S140000, C507S145000, C507S203000, C507S269000, C507S271000, C507S277000
Reexamination Certificate
active
07081437
ABSTRACT:
A method of formulating and the resulting biodegradable wellbore fluid includes a first synthetic internal olefin fraction having from 16 to 18 carbon atoms (C16-18IO), a second synthetic internal olefin fraction having between 15 to 18 carbon atoms (C15-18IO), and a third synthetic internal olefin fraction having 15 to 16 carbon atoms (C15-16IO). The components of the wellbore fluid are blended such that the desired characteristics of polycyclic aromatic hydrocarbon content, toxicity and biodegrability are balance to achieve compliance with environmental requirements for hydrocarbon based drilling fluids. One such illustrative embodiment achieves this result by utilizing a formulation in which the first internal olefin fraction is present in a range of about 45 to about 55 percent by weight of the wellbore fluid and wherein the second internal olefin fraction is present in range of about 20 to about 30 percent by weight of the wellbore fluid and wherein the third olefin fraction is present in range of about 20 to about 30 percent by weight of the wellbore fluid. Optionally, the illustrative fluid can include a C16alpha olefin (C16AO). In such instances, the C16alpha olefin (C16AO) is present in the range of about 10 to about 20 percent by weight of the wellbore fluid.
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Candler John
Friedheim Jim
Patel Arvind D.
Rabke Stephen
M-I L.L.C.
Sellers Robert
White Carter J.
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