Wells – Processes – Cementing – plugging or consolidating
Reexamination Certificate
2003-01-24
2009-06-09
Marcantoni, Paul (Department: 1793)
Wells
Processes
Cementing, plugging or consolidating
C166S293000, C106S724000, C106S727000, C106S823000
Reexamination Certificate
active
07543642
ABSTRACT:
Cement compositions comprising flexible, compressible beads, processes for preparing such cement compositions, and methods of cementing in subterranean formations using such cement compositions. One or more flexible, compressible beads are mixed with the cement before pumping the cement into a well bore. The flexible, compressible beads are preferably composed of an elastomeric material such as a copolymer of methylmethacrylate and acrylonitrile; a terpolymer of methylmethacrylate, acrylonitrile, and dichloroethane; a styrene-divinylbenzene copolymer; and polystyrene. The flexible, compressible beads may be heated to expand the beads before mixing with the cement such that the ensuing cement composition will have a desired density. Non-flexible beads such as spherulites may also be added to the cement compositions.
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Ravi Krishna M.
Reddy B. Raghava
Szymanski Michael J.
Conley & Rose, P.C.
Halliburton Energy Service,s Inc.
Marcantoni Paul
Roddy Craig W.
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