METHOD OF PROVIDING AN ANNULAR SEAL, AND WELLBORE SYSTEM
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United States of America Patent
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Issued Date -
Oct 31, 2013
app pub date -
Dec 20, 2011
filing date -
Dec 22, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of providing an annular seal around a tubular in a wellbore penetrating a subsurface formation, the method comprising providing a tubular in the wellbore, wherein an annular space (18) is formed around the tubular; providing an annular gravel pack in the annular space; wherein the method further comprises arranging a band (9a, 9b, 9c, 9d) of gel-forming material around the tubular before providing the annular gravel pack, wherein the gel-forming material is swellable in a selected fluid, and wherein the annular seal is formed by contacting the band of gel-forming material with the selected fluid; and a wellbore system comprising a gravel-packed tubular in a wellbore, wherein the tubular is provided with a band of gel-forming material in a layer around the tubular, the band being surrounded by gravel (15), and wherein the gel-forming material is swellable in a selected fluid.
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