Mounting means for cutting elements in drag type rotary...

Details Mounting means for cutting elements in drag type rotary... Mounting means for cutting elements in drag type rotary...

E - Fixed Constructions

21

B

255/69

E21B 10/54 (2006.01) E21B 10/56 (2006.01)

Patent

CA 1280405

MOUNTING MEANS FOR CUTTING ELEMENTS IN DRAG TYPE ROTARY DRILL BIT Abstract of the Disclosure A drag type rotary drill bit (10) having mounted on its lower face (22) a rigid integral holder (30) for a plurality of polycrystalline diamond compact (PDC) cutting elements (42) secured to a planar face (60) of the holder (30). An upper projecting tapered end portion (71) of the holder (30) defines tapered surfaces (72, 73) with the lower tapered surface (72) extending at a relatively large clearance angle (B) to provide a relatively small wear flat surface on the holder (30).

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