Wells – Processes – Cementing – plugging or consolidating
Reexamination Certificate
2011-01-11
2011-01-11
Bates, Zakiya W. (Department: 3676)
Wells
Processes
Cementing, plugging or consolidating
C166S300000
Reexamination Certificate
active
07866394
ABSTRACT:
Methods of cementing in subterranean formations, cement compositions, and methods for making the compositions are provided. A cement slurry is passed into a subterranean formation, and a swelling agent is passed into the subterranean formation to reduce an amount of water flowing into the cement slurry. The swelling agent may be combined with a carrier fluid before being displaced into the subterranean formation. Alternatively, the swelling agent may be pre-mixed with the cement slurry to form a new cement composition, followed by displacing the cement composition into the subterranean formation. The swelling agent is present in an amount effective to, upon absorption of water and swelling to form a gel mass, substantially block the flow path of the water into the cement composition or reduce losses to low pore pressure intervals, thereby preventing the integrity of the cement composition from being compromised or lost to voidage, fractures, fissures, etc.
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Boatman Charles L.
Creel Prentice G.
Dalrymple Eldon Dwyann
Eubank John L.
Luscombe Stephen P.
Bates Zakiya W.
Conley & Rose, P.C.
Halliburton Energy Service,s Inc.
Roddy Craig W.
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