Gap sub assembly

Details Gap sub assembly Gap sub assembly

2007-08-14

2007-08-14

Thompson, Kenneth (Department: 3672)

Boring or penetrating the earth

With tool shaft detail

C166S242600, C166S065100

Reexamination Certificate

active

11074009

ABSTRACT:
The gap sub assembly comprises a pair of electrically conductive subs. Each sub has a threaded pin and box. A pin and box are threaded together to form a connection. An electrically insulating, woven fabric overlies and conforms with the threads of the connection pin. An electrically insulating, annular washer separates the seal faces of the connection. The assembly functions to provide an electrical discontinuity when incorporated into a conductive drill string.

REFERENCES:
patent: 2388141 (1945-10-01), Harrington
patent: 2622124 (1952-12-01), Homer
patent: 4496174 (1985-01-01), McDonald et al.
patent: 4589187 (1986-05-01), Stone et al.
patent: 5138313 (1992-08-01), Barrington
patent: 5396232 (1995-03-01), Mathieu et al.
patent: 5783039 (1998-07-01), Murayama
patent: 7080699 (2006-07-01), Lovell et al.
patent: 2004/0206510 (2004-10-01), Fraser et al.

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