Ramey & Schwaller wishes to congratulate its client CNPC USA CORPORATION on issuance of US Patent # 10,563,464 titled CONVEX RIDGE TYPE NON -PLANAR CUTTING TOOTH AND DIAMOND DRILL BIT on February 18, 2020.  The present invention provides non-planar cutting tooth and a diamond drill bit. The non-planar cutting tooth and the diamond drill bit have great ability of impact resistance and balling resistance. According to the features of drilled formation, cutting teeth are arranged on the drill bit with different mode, which can improve the mechanical speed and footage of the drill bit.

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