| http://www.w3.org/ns/prov#value | - Conversely, when casing string 204 is rotated in an opposite direction, then bolt 222 acts to longitudinally decompress plug 226, thereby circumferentially retracting plug 226 so that gas or other fluid may bypass plug 226. [0026] In operation of one embodiment of system 200 of FIG. 2, main wellbore 106 is drilled via any suitable method.
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