Variable choke valve

Details Variable choke valve Variable choke valve

2008-05-27

2008-05-27

Tsay, Frank (Department: 3676)

Wells

Processes

Placing or shifting well part

C166S325000, C166S334100

Reexamination Certificate

active

07377327

ABSTRACT:
Embodiments of the present invention generally provide a more reliable variable choke flow control valve. In one embodiment, a variable choke valve for use in a wellbore is provided. The valve includes a tubular housing having an axial bore therethrough and a port through a wall thereof. The valve further includes a tubular sleeve having an axial bore therethrough and first and second holes through a wall thereof and disposed within the housing. The first hole is larger than the second hole, and the sleeve is actuatable among three positions: a first position where the first hole is aligned with the port, a second position where the second hole is aligned with the port, and a third position where the sleeve wall is aligned with the port.

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U.K. Search Report, Application No. GB0613871.3, dated Mar. 8, 2007.
U.K. Search Report, Application No. GB0613871.3, dated Nov. 9, 2006.

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