Method of manufacturing an insulating coupling for drill collars

Details Method of manufacturing an insulating coupling for drill collars Method of manufacturing an insulating coupling for drill collars

1984-01-23

1986-05-20

Moon, Charlie T.

Metal working

Method of mechanical manufacture

Assembling or joining

295272, 10 1R, 285 47, 285333, 285334, 427105, B23P 2500

Patent

active

045891877

ABSTRACT:
An insulating coupling for drill collars and a method of manufacture thereof are presented wherein the coupling consists of an electrically insulating ceramic coating applied in thickness from 0.002 to 0.006 inch to the threads of the coupling by a detonation gun process and sealed with an epoxy sealer to reduce porosity.

REFERENCES:
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patent: 3496682 (1970-02-01), Quaas et al.
patent: 3639639 (1972-02-01), McCard
patent: 3941903 (1976-03-01), Tucker, Jr.
patent: 4301730 (1981-11-01), Heurich et al.
patent: 4496174 (1985-01-01), McDonald et al.

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