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United States Patent 9297251 Abstract: A drill bit includes a plurality of blades. The blades provide a plurality of cutting elements or teeth arranged on a leading face of the blade

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United States Patent 6,561,291 Xiang May 13, 2003 Roller cone drill bit structure havin This invention is related to the field of drill bits used to drill wellbores in the earth. More s

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United States Patent 8020639 Abstract: The blades of a PDC bit have a nozzle betwee 1. A drill bit for making a wellbore, comprising: a plurality of blades extending from a bod

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United States Patent 1191 [11] 3,743,038 Bennett July 3, 1973 [54] DRILL BIT 1,388,45 DRILL BIT BACKGROUND OF THE INVENTION This invention relates to a rotary earth

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