| http://www.w3.org/ns/prov#value | - The programmed instructions may be used to fire the perforating gun 236 and, after perforation, critical information, such as temperature and pressure in the wellbore proximate the perforation, can again be transmitted to the surface by third transponders 240 released from the downhole tool 224 in the manner described above. [0103] As shown in FIG. 19, non-acoustic transponders may also be used to
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