Non-orienting, multiple ported, cylindrical pressure transfer device
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United States of America Patent
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Aug 26, 1986
Grant Date -
N/A
app pub date -
Jul 6, 1984
filing date -
Jul 6, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A production tubing for an oil well is supported by two solid structures at the wellhead. A downhole valve is controlled through pressure of a hydraulic fluid provided by a ground-level source connected to the downhole valve through a penetrating conduit formed in three segments. The first segment is formed by drilling a passage through the upper structure which communicates with a passage provided in a sleeve clamped between the two structures. The third segment is provided by drilling a passage through the lower structure which communicates with the passage provided in the sleeve.
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