发明名称 |
Downhole packer having tandem packer elements for isolating frac zones |
摘要 |
A tandem packer seals a wellbore annulus with first and second seals. The packer has a body defining a bore therethrough and has a shoulder disposed on the body. A compressible element is disposed on the body adjacent the shoulder. A piston is movably disposed on the body adjacent the compressible element and is activated by fluid pressure communicated through a port in the packer's bore. When actuated, the piston fits between the compressible element and the body to initially expand it outward. With further fluid pressure, the piston compresses the compressible element against the shoulder to expand the element radially outward and produce a first seal with a surrounding surface. A swellable element also disposed on the body is swellable in the presence of an agent and expands radially outward to produce a second seal with the surrounding surface. 10 12 10. ' 12 120-a5 120 4 <' 140 140 '150 /1 1< / 7 / 170 1 7 0 -z ..,, 180 --- 180 FIG IA5 FIG I |
申请公布号 |
AU2011202199(B2) |
申请公布日期 |
2014.01.16 |
申请号 |
AU20110202199 |
申请日期 |
2011.05.12 |
申请人 |
WEATHERFORD/LAMB, INC. |
发明人 |
WILKIN, JAMES F.;JORDAN JR., HENRY JOE |
分类号 |
E21B33/124;E21B33/127;E21B33/128 |
主分类号 |
E21B33/124 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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