Insulating coupling for drill collars and method of...

Details Insulating coupling for drill collars and method of... Insulating coupling for drill collars and method of...

B - Operations, Transporting

23

P

26/156, 255/26,

B23P 25/00 (2006.01) E21B 17/00 (2006.01) E21B 17/042 (2006.01) F16B 33/00 (2006.01) F16L 11/12 (2006.01) F16L 25/02 (2006.01)

Patent

CA 1254247

-12- INSULATING COUPLING FOR DRILL COLLARS AND METHOD OF MANUFACTURE THEREOF 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.

472588

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