Annular safety assembly for an oil well, especially a double production zone well
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United States of America Patent
Stats
-
Feb 23, 1988
Grant Date -
N/A
app pub date -
Jan 27, 1986
filing date -
Feb 5, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An annular safety assembly comprising, between an upper cylindrical body and a lower cylindrical body, through which connecting tubes of production tubes pass, a packer and a low-bulk anchorage system consisting of a radial spacing ring, a resilient anchorage ring split along a generatrix and provided with peripheral anchorage teeth and a thrust ring which can be moved upwardly by thruster-plungers extending from the lower cylindrical body to apply the anchorage ring to the casing, and a safety valve arranged separately from the connecting tubes, which extend between the said cylindrical bodies, and below the lower cylindrical body.
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