| CPC E21B 33/1243 (2013.01) [E21B 33/1277 (2013.01)] | 20 Claims |
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1. A high expandable straddle to provide annular isolation in a well bore, comprising:
a. first and second expandable pipe sections;
b. a base pipe section located between the first and second expandable pipe sections, ends of the base pipe section having a continuous outer diameter; and
c. first and second end pipe sections located at each end of the first and second expandable pipe sections respectively, and the first and second expandable pipe sections are mounted over the continuous outer diameter of the ends of the base pipe sections by overlapping joints;
d. the first and second expandable pipe sections being configured to expand radially outwards in contrast to the base pipe and end sections when pressure is applied to an inside surface of the pipe sections.
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