Non-orienting, multiple ported, cylindrical pressure transfer de

Wells – Above ground apparatus – Inner member anchor or seal with lateral port

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Details

2851372, 285 93, E21B 3303

Patent

active

046076913

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.

REFERENCES:
patent: 4090565 (1978-05-01), McGee
patent: 4458903 (1984-07-01), Tohill

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