Replaceable insert stud for drilling bits

Details Replaceable insert stud for drilling bits Replaceable insert stud for drilling bits

1987-10-22

1988-11-08

Dang, Hoang C.

Boring or penetrating the earth

Bit or bit element

Plural separable cutter elements

175329, 175413, E21B 1062, E21B 1046

Patent

active

047829036

ABSTRACT:
Threaded insert studs are disclosed for insertion into a drilling bit body. Holes are predrilled or precast into the bit body, and the studs are inserted in the holes. Locking nuts are used to secure the studs in place. The insert studs and holes are tapered to allow a close interfitting relationship between the insert studs and holes, and an elongated key is engaged with aligned, longitudinal slots in the insert studs and holes.

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