Wells – Screen with valve – closure – changeable restrictor or portion...
Reexamination Certificate
2002-03-15
2008-09-02
Gay, Jennifer H. (Department: 3676)
Wells
Screen with valve, closure, changeable restrictor or portion...
C166S169000, C166S227000
Reexamination Certificate
active
07419002
ABSTRACT:
A flow arrangement (10, 12) for use in a well through one or more underground reservoirs, and where the arrangement (10, 12) is designed to throttle radially inflowing reservoir fluids produced through an inflow portion of the production tubing in the well, the production tubing in and along this inflow portion being provided with one or more arrangements (10, 12) Such an arrangement (10, 12) is designed to effect a relatively stable and predictable fluid pressure drop at any stable fluid flow rate in the course of the production period of the well, and where said fluid pressure drop will exhibit the smallest possible degree of susceptibility to influence by differences in the viscosity and/or any changes in the viscosity of the inflowing reservoir fluids during the production period. Such a fluid pressure drop is obtained by the arrangement (10, 12) comprising among other things one or more short, removable and replaceable flow restrictions such as nozzle inserts (44, 62), and where the individual flow restriction may be given the desired cross section of flow, through which reservoir fluids may flow and be throttled, or the flow restriction may be a sealing plug.
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Christensen Ove Sigurd
Dybevik Arthur
Moen Terje
Andrus Sceales Starke & Sawall LLP
Fuller Robert E
Galloway Bryan P.
Gay Jennifer H.
Reslink G.S.
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