Downhole circulating valve having a metal-to-metal seal
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United States of America Patent
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-
Jul 1, 2014
Grant Date -
Oct 3, 2013
app pub date -
Jan 20, 2013
filing date -
Apr 3, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A downhole circulating valve includes a generally tubular outer housing having an axially extending internal passageway including an internal seat and at least one generally radially extending opening formed through the housing intersecting the internal seat. A valve element is rotatably disposed within the internal passageway. The valve element has an axially extending internal bore and a head portion disposed at least partially within the internal seat. The head portion includes at least one generally radially extending seal element. The valve element has a first position relative to the housing, wherein the seal element is not aligned with the opening, thereby allowing fluid communication between the opening and the internal passageway. The valve element has a second position relative to the housing, wherein the seal element is aligned with the opening and wherein the seal element forms a metal-to-metal seal with the internal seat, thereby preventing fluid communication between the opening and the internal passageway.
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