Mounting means for cutting elements in drag type rotary drill bi

Details Mounting means for cutting elements in drag type rotary drill bi Mounting means for cutting elements in drag type rotary drill bi

1986-02-18

1987-07-28

Bilinsky, Z. R.

Boring or penetrating the earth

Bit or bit element

Magnetized or with magnet

175410, 408144, 408145, E21B 1046

Patent

active

046826637

ABSTRACT:
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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patent: 4440246 (1984-04-01), Jurgens
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patent: 4452324 (1984-06-01), Jurgens
patent: 4499958 (1985-02-01), Radtke et al.
patent: 4505342 (1985-03-01), Barr et al.
patent: 4533004 (1985-08-01), Ecer

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