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Keywords: footage
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Proceedings Papers

Paper presented at the SPE Central Plains Regional Meeting, November 15–17, 1970
Paper Number: SPE-3155-MS
... to meet special conditions, such as extending bit life in order to save a round trip, reducing bit life as a result of changing formations, critical rotary speeds and crooked hole conditions, (5) revising optimum bit weights, rotary speeds, and bit footages on an instantaneous basis during drilling and (6...

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