Electrical isolation connector subassembly for use in...

Pipe joints or couplings – With casing – lining or protector – Insulated

Reexamination Certificate

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Details

C285S053000, C285S333000, C175S320000, C175S040000

Reexamination Certificate

active

11265486

ABSTRACT:
An electrical isolation connector subassembly for interconnecting adjacent tubular drill rods of a drilling system used in drilling bore holes in earth formations, the connector comprising an electrically insulative sleeve being sandwiched between two electrically isolated subassembly components, the sleeve providing an exterior gap between the edges of the spaced apart electrically isolated components, the exterior gap having a width of less than 50 cm.

REFERENCES:
patent: 4496174 (1985-01-01), McDonald
patent: 4684946 (1987-08-01), Issenmann
patent: 4861074 (1989-08-01), Eastlund
patent: 5138313 (1992-08-01), Barrington
patent: 5163714 (1992-11-01), Issenmann
patent: 5394141 (1995-02-01), Soulier
patent: 5467832 (1995-11-01), Oban
patent: 6050353 (2000-04-01), Logan
patent: 6158532 (2000-12-01), Logan et al.
patent: 6572152 (2003-06-01), Dopf
patent: 2151525 (1996-12-01), None
patent: 0940557 (1999-09-01), None
patent: 2618912 (1989-02-01), None
patent: WO-03/004826 (2003-01-01), None

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