US 6,648,073 B1 · Retrievable sliding sleeve flow control valve for zonal isolation control system

Abstract

A system for controlling fluid flow from multiple isolated producing zones in a well is provided. Components of the system are placeable in and retrievable from bottom entry side pocket mandrel sections permanently installed in a production tubing string in the well. These components include retrievable isolation valve modules. Control signals for modules are developed either downhole or at the surface and modules may be placed or retrieved through the production tubing without pulling the production tubing from the well. In high flow rate applications the sliding sleeve flow control valve of the present invention provides a variable aperture valve having a fully open cross sectional area equal to that of the production tubing, thereby achieving a minimal pressure drop across the valve.

Claims18

Dependent claims

A system for monitoring and controlling fluid flow from one or more isolated hydrocarbon producing zones in a borehole, comprising:

at least one through tubing sized, electrically powered, flow monitor and control module for measuring fluid flow properties in a cased well borehole, said module being wireline retrievable and being housed in a side pocket of at least one permanently installed mandrel section of a production tubing string in the borehole;
and
at least one sliding sleeve isolation valve module carried by said at least one module for regulating fluid flow from the annulus in said isolated hydrocarbon producing zone to the interior of the production tubing string, said sliding sleeve valve having a longitudinally moveable piston.

Dependencies are inferred from the claim text.

Retrievable sliding sleeve flow control valve for zonal isolation control system

Life of this patent

Retrievable sliding sleeve flow control valve for zonal isolation control system

Life of this patent

Abstract

Claims18