| US 7,497,258 B2 | ||
| Methods of isolating zones in subterranean formations using self-degrading cement compositions | ||
| Mark R. Savery, Duncan, Okla. (US); Ashok K. Santra, Duncan, Okla. (US); and Bradley L. Todd, Duncan, Okla. (US) | ||
| Assigned to Halliburton Energy Services, Inc., Duncan, Okla. (US) | ||
| Filed on Jul. 22, 2005, as Appl. No. 11/188,280. | ||
| Application 11/188280 is a continuation in part of application No. 11/048272, filed on Feb. 01, 2005. | ||
| Application 11/048272 is a continuation in part of application No. 11/048591, filed on Feb. 01, 2005. | ||
| Prior Publication US 2006/0169454 A1, Aug. 03, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. E21B 33/13 (2006.01) | ||
| U.S. Cl. 166—292 [166/293] | 20 Claims |
| 1. A method comprising:
providing a self-degrading cement composition that comprises a degradable material, an acid source, a base source, and a water
source;
placing the self-degrading cement composition in a zone within a subterranean formation; and
allowing the self-degrading cement composition to set to form a solid mass that is capable of isolating the zone from a well
bore penetrating the zone or from another zone.
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