| US 7,497,278 B2 | ||
| Methods of degrading filter cakes in a subterranean formation | ||
| Kirk Schriener, Duncan, Okla. (US); and Trinidad Munoz, Jr., Duncan, Okla. (US) | ||
| Assigned to Halliburton Energy Services, Inc., Duncan, Okla. (US) | ||
| Filed on Aug. 24, 2006, as Appl. No. 11/509,411. | ||
| Application 11/509411 is a continuation in part of application No. 10/752752, filed on Jan. 07, 2004, granted, now 7,140,438. | ||
| Application 10/752752 is a continuation in part of application No. 10/641242, filed on Aug. 14, 2003, granted, now 7,080,688. | ||
| Application 10/641242 is a continuation in part of application No. 10/650101, filed on Aug. 26, 2003, granted, now 7,276,466. | ||
| Prior Publication US 2006/0283597 A1, Dec. 21, 2006 | ||
| Int. Cl. E21B 21/00 (2006.01); E21B 37/00 (2006.01); C09K 8/06 (2006.01); C09K 8/10 (2006.01); C09K 8/52 (2006.01) | ||
| U.S. Cl. 175—64 [166/300; 166/307; 166/312; 175/65; 175/72; 507/103; 507/136; 507/140; 507/261; 507/267] | 20 Claims |
| 1. A method comprising:
providing a well drill-in and servicing fluid comprising an aqueous fluid, a viscosifier, a fluid loss control additive, a
bridging agent, and an orthoester composition;
using the well drill-in and servicing fluid to drill a well bore in a subterranean formation;
allowing the well drill-in and servicing fluid to establish a filter cake in at least a portion of the well bore;
contacting at least a portion of the filter cake with a breaker fluid comprising an orthoester composition; and
allowing at least a portion of the filter cake to degrade.
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