Title A New Method of Producing Laterally Stable PDC Drill Bits
Author S. Johnson, SPE, ReedHycalog
SPE 98986-MS 2006
Title PDC Bits Run on Turbodrills: The History, Facts, and Current Developments
Author R. Seale, Sii-Neyrfor and D. Conroy, Smith Bits
SPE 94826-MS 2005
[ 此贴被笑韵在2008-02-25 16:14重新编辑 ]