Well devices with annulus check valve and hydraulic by-pass
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United States of America Patent
Stats
-
May 22, 1984
Grant Date -
N/A
app pub date -
Sep 21, 1981
filing date -
Sep 21, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Hanger apparatus for suporting pipe in a well, the apparatus including both an annulus check valve, via which communication is established with the annulus between the suspended pipe and surrounding casing, and a pressure fluid by-pass, via which communication with a down-hole device such as a safety valve is established. Opening of the check valve and establishment of communication via the by-pass are accomplished by a simple stabbing operation with, e.g., a handling tool or a production upper body. Alternately, the check valve is opened by hydraulic pressure delivered via the production upper body.
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Family
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Cited Art Landscape
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