Pipe liner connector

Details Pipe liner connector Pipe liner connector

2003-07-25

2008-10-07

Bochna, David E (Department: 3679)

Pipe joints or couplings

With casing, lining or protector

Insulated

C285S055000, C285S370000

Reexamination Certificate

active

07431341

ABSTRACT:
A pipe liner connector suitable for connecting pipe sections that comprise a liner is described. The pipe liner connector comprise vents and/or venting grooves which act to balance the pressure between the micro-annulus, formed between the liner and the pipe sections, and the pipe bore formed when the pipe sections are connected together. The inclusion of these features helps prevent the collapse or the uncontrolled distortion of the pipe liner connector during pressure cycles in operating pipelines.

REFERENCES:
patent: 2366579 (1945-01-01), Von Ahrens
patent: 2646995 (1953-07-01), Thompson
patent: 3508766 (1970-04-01), Kessler
patent: 3876233 (1975-04-01), Schmedding et al.
patent: 4006920 (1977-02-01), Sadler et al.
patent: 4357745 (1982-11-01), Chlebowski
patent: 4681349 (1987-07-01), Press et al.
patent: 4819965 (1989-04-01), Press et al.
patent: 4913465 (1990-04-01), Abbema et al.
patent: 5566984 (1996-10-01), Abbema et al.
patent: 5988691 (1999-11-01), Cruickshank
patent: 5992897 (1999-11-01), Hill et al.
patent: WO-02/33298 (2002-04-01), None

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