Expandable injector pipe

Details Expandable injector pipe Expandable injector pipe

2005-08-04

2008-10-21

Thompson, Kenneth (Department: 3672)

Wells

Valves, closures or changeable restrictors

Fluid operated

C166S236000, C166S386000, C137S853000

Reexamination Certificate

active

07438131

ABSTRACT:
An expandable injector pipe has openings and a cover sleeve preferably secured at opposed ends with offset openings. Expansion of the base pipe causes the cover sleeve to expand while keeping the openings in the cover sleeve misaligned with the openings in the base pipe. Pressure from within the base pipe flexes the resilient cover sleeve to allow fluid to exit through the cover sleeve. Upon removal of applied pressure, the cover sleeve moves back against the base pipe to cover the openings in the base pipe to prevent flow in the reverse direction.

REFERENCES:
patent: 1384305 (1921-07-01), Crotto
patent: 1667649 (1928-04-01), Boynton
patent: 1854518 (1932-04-01), Little
patent: 2391605 (1945-12-01), Walton
patent: 2657899 (1953-11-01), Kohler et al.
patent: 3638726 (1972-02-01), Sibley
patent: 3722854 (1973-03-01), Parola
patent: 6530431 (2003-03-01), Castano-Mears et al.
patent: 6978840 (2005-12-01), Henderson
patent: 7152687 (2006-12-01), Gano
patent: 08165640 (1996-06-01), None

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