Zonal isolation system

a technology of zonal isolation and isolation system, which is applied in the direction of sealing/packing, fluid removal, borehole/well accessories, etc., can solve the problems of hydraulic isolation, openhole, and current openhole zonal isolation system not designed to enable long-term
US20090283279A1Inactive Publication Date: 2009-11-19SCHLUMBERGER TECH CORP
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
SCHLUMBERGER TECH CORP
Publication Date
2009-11-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

A zonal isolation system for use in a well is provided. The zonal isolation system includes a zonal isolation tool, at least one anchor, and at least one polished bore receptacle. The zonal isolation system may include a setting string for activation of the zonal isolation tool and / or the at least one anchor. The zonal isolation system may also include an isolation string for maintaining separation zones during production or injection of the well.
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Description

[0001] This application claims the benefit under 35 U.S.C. § 119(e) of and is a continuation-in-part of U.S. Provisional Application Ser. No. 60 / 594,628, entitled “Zonal Isolation Tool,” filed Apr. 25, 2005; and of U.S. application Ser. No. 11 / 308,617, entitled, “Zonal Isolation Tools and Methods of Use,” filed Apr. 12, 2006, both hereby incorporated by reference.RELATED ART

[0002] A zonal isolation tool should provide reliable, long-term isolation between two or more subsurface zones in a well. A typical application would be to segregate two zones in an open-hole region of a well, the zones being separated by a layer of low permeability shale in which the zonal isolation tool is placed. A nominal size configuration would be usable in wellbores drilled with an 8½ inch (21.6 cm) outer diameter bit below 9⅝ inch (24.5 cm) casing, but the use of zonal isolation tools is not limited to any particular size, or to use in open holes. By segregating open-hole intervals, downhole chokes may be ...

Claims

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