New PDC coring bit circular contour abandon the traditional knife-wing design

Bit crown design Huaqing oil region to massive sandstone reservoir, ranging from thick mudstone  polycrystalline diamond , sand and wide distribution, thickness, drilling, and no gravel strata belonging to medium hardness, wear and tear with the other principles and other principles of combining cutting crown profile design, the new PDC  cubic boron nitride  contour abandon the traditional knife-wing design, with flat double-arc design, schematic cross section of drill bits PDC cutter contour selection based on  grinding wheel  being drilled lithological features, choose the 13mm diameter composite sheet as the main PDC cutting elements, select the taper of 30 ° of the new tines PDC PDC for the auxiliary.