| http://www.w3.org/ns/prov#value | - Typical annular isolators such as inflatable packers, however, have not been found compatiblewith the type of production installation illustrated in FIG. 1 for various reasons, including the fact that the structural members required to mount and operate such packers are not expandable along with the tubing string.The annular isolators included in prior systems have typically included thin rubber s
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