Flow control device

Wells – Valves – closures or changeable restrictors – Longitudinally movable operator

Reexamination Certificate

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Details

C166S241600, C175S325500

Reexamination Certificate

active

07546879

ABSTRACT:
The invention relates to a device for control of the flow through a production tube placed in an oil well. The device comprising a portion of the production tube provided with through orifices and protection equipment for providing resistance to wear by erosion. The protection equipment comprises several add-on sectors assembled around the portion of the tube. Each add-on sector provided with an associated inner stiffener penetrating into the portion of the production tube through at least one through orifice. At least one of the add-on sectors provided with at least one opening extending through the sector and its associated inner stiffener.

REFERENCES:
patent: 2594551 (1952-04-01), Gist
patent: 2944794 (1960-07-01), Myers
patent: 4059293 (1977-11-01), Sipler
patent: 6325150 (2001-12-01), Rayssiguier
patent: 6328112 (2001-12-01), Malone
patent: 6371208 (2002-04-01), Norman et al.
patent: 6491097 (2002-12-01), Oneal et al.
patent: 6668935 (2003-12-01), McLoughlin et al.
patent: 1081330 (2001-03-01), None
patent: 2790509 (2000-09-01), None

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