Wired composite tubing yields time-lapse resistivity logging

Although commercial applications of composite coiled-tubing systems for drilling and well construction are limited, the work performed in test wells has yielded interesting results.The composite coiled-tubing system, which Halliburton calls the Anaconda Advanced Well Construction System, has drilled wellbores at a company facility in Oklahoma and in a test well for BP PLC, called the G.W. Craig No. 1, in Chocolate Bayou near Galveston, Tex.According to Halliburton's information, the system has drilled 9,252 ft of 43/4-in. hole in the test wells, with the coiled-tubing running 1.3 million cumulative ft in the test wells and flow loops, and 1,950 hr total circulating time.The openhole t...

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