Downhole drill bit cone with uninterrupted refractory coating

Details Downhole drill bit cone with uninterrupted refractory coating Downhole drill bit cone with uninterrupted refractory coating

1992-04-30

1994-01-18

Dang, Hoang C.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

175307, 175426, E21B 1052

Patent

active

052793745

ABSTRACT:
Drill bits having projecting inserts are completely coated with refractory material including on the edge margins about the inserts by thermally spraying with refractory particles whose particulate constituent under the spraying conditions is able to penetrate the inserts. Completely coated drill bits are provided.

REFERENCES:
patent: 4396077 (1983-08-01), Radtke
patent: 4562892 (1986-01-01), Ecer
patent: 4593776 (1986-06-01), Salesky et al.
patent: 4597456 (1986-07-01), Ecer
patent: 4705124 (1987-11-01), Abrahamson et al.
patent: 4811801 (1989-03-01), Salesky et al.
patent: 4940099 (1990-07-01), Deane et al.

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