Patent Number: 6,308,783

Title: Wellbore flow control device

Abstract: A device for regulating fluid flow in a well is provided. The device may include: a body member having a central bore extending therethrough, at least one flow port, and a first valve seat; a sleeve member movably disposed within the central bore of the body member, and having a second valve seat adapted for cooperable sealing engagement with the first valve seat; means for selectively controlling movement of the sleeve member to regulate fluid flow through the at least one flow port; and conduit means -or transmitting energy to the movement means. The conduit means may include a first and a second hydraulic control line, a single hydraulic control line, or a single electrical conductor. The movement means may include: a piston connected to the sleeve member and movable in response to a combination of hydraulic fluid, pressurized gas, spring force, and/or annulus pressure; or an electric motor connected to the sleeve member.

Inventors: Pringle; Ronald E. (Houston, TX), Milligan, Jr.; Clay W. (Missouri City, TX), Leismer; Dwayne D. (Pearland, TX)

Assignee: Schlumberger Technology Corporation

International Classification: E21B 23/02 (20060101); E21B 23/00 (20060101); E21B 34/00 (20060101); E21B 21/00 (20060101); E21B 21/10 (20060101); E21B 17/02 (20060101); E21B 34/10 (20060101); E21B 23/03 (20060101); E21B 23/12 (20060101); E21B 43/30 (20060101); E21B 43/00 (20060101); E21B 34/08 (20060101); E21B 43/12 (20060101); E21B 43/14 (20060101); E21B 034/10 (); E21B 034/14 ()

Expiration Date: 10/30/2018