Tooth design using cylindrical diamond cutting elements

Details Tooth design using cylindrical diamond cutting elements Tooth design using cylindrical diamond cutting elements

E - Fixed Constructions

21

B

255/70

E21B 10/58 (2006.01) E21B 10/56 (2006.01)

Patent

CA 1218355

IMPROVED TOOTH DESIGN USING CYLINDRICAL DIAMOND CUTTING ELEMENTS Abstract of the Disclosure The cutting performance of cylindrical polycrystalline synthetic diamond elements is improved by segmenting such cylindrically shaped elements along a plane or planes parallel to the longitudinal axis of the cylindrically shaped elements. In the preferred embodiments half cylinder or quarter cylinder shaped segments are incorporated as the diamond cutting elements within teeth disposed on a rotating bit. The planar surface or surfaces characterizing the cylindrical segments are oriented within the tooth to provide the leading and cutting face of the diamond cutting element. Typically, such planar surfaces are entirely exposed and disposed adjacent to and form one wall of an adjacent and preceding fluid channel whereby cleaning and cooling efficiency is also improved. page 1

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