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An-.er.41~a, InC <br />90 <br />80 <br />70 <br />r <br />~_ 60 <br />w <br />t- <br />~ 50 <br />Z <br />O <br />a ao <br />o: <br />2 30 <br />w <br />a <br />20 <br />10 <br />MWA-2 Drilling ana Como,ehon Reoon <br />v O O O O O p <br />O' ~ ~ O lpff b ~ CpD Ooi O ~ N <br />DEPTH (ft) <br />Figure 8. Penetration•Rate Variations during Drilling of AmerAlia MWA•2 <br />(based on drillers observations) <br />