Earth boring – well treating – and oil field chemistry – Well treating – Contains organic component
Reexamination Certificate
2009-10-15
2011-12-20
Kugel, Timothy J. (Department: 1763)
Earth boring, well treating, and oil field chemistry
Well treating
Contains organic component
C166S250070
Reexamination Certificate
active
08080498
ABSTRACT:
The concept involves placing within the annulus, hollow particles that possess material and geometric properties such that the hollow particles buckle at or near a defined pressure. Buckling of the particles increases the available volume within the annulus, thereby decreasing the annular pressure. The elastic hollow particles are designed such that they buckle in a sufficiently elastic manner to allow them to rebound towards their original shape as the pressure decreases. The rebounded particles then remain available to mitigate subsequent instances of APB.
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PCT Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration, issued in related application No. PCT/US2009/060807, mailed Dec. 22, 2010, 12 pages.
Pattillo, II Phillip David
Rakow Joseph F.
Shepherd James E.
BP Corporation North America Inc.
Fisher Barbara A.
Kugel Timothy J.
Li Aiqun
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