发明名称 DOWNHOLE ISOLATION METHODS AND APPARATUS THEREFOR
摘要 The invention provides a method and apparatus for use in a wellbore gravel pack operation. The method comprises providing an apparatus in a downhole annulus. The apparatus comprises a mandrel and a swellable element formed from a material selected to increase in volume when exposed to a downhole stimulus. The method comprises placing a gravel pack below the apparatus via the downhole annulus in which the apparatus is located, and placing a gravel pack above the apparatus. Subsequent to placing the gravel packs, the swellable element is increased in volume to create an annular barrier in the wellbore. The invention allows isolation of multiple intervals of a well in a single gravel pack operation using swellable elastomers, and does not rely on the use of shunt tube alternate path systems. 202 207a 204 207b 2 208 203 206a 208 Fig.2A 206b 208 202 207a 204 210 207b -201 208 206a 208 - 206b 208 202 207a 204 207b -20 1 .~ . - - - -: ;. - - 208 212 206a 210 212 208 206b 212 208
申请公布号 AU2012261722(B2) 申请公布日期 2015.04.30
申请号 AU20120261722 申请日期 2012.12.11
申请人 SWELLTEC LIMITED 发明人 BROUSSARD, JOHN;NUTLEY, BRIAN;CLARKE, ROSS;NUTLEY, KIM
分类号 E21B43/04;E21B43/00 主分类号 E21B43/04
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