Releasable coupling
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United States of America Patent
Stats
-
Jul 22, 1986
Grant Date -
N/A
app pub date -
Oct 20, 1982
filing date -
Oct 20, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A releasable coupling has opposite ends adpated to be connected into a tool string or tubing string and run downhole into a borehole. A sealing member is passed down through the tubing string and allowed to become seated within the axial passageway of the releasable coupling. Pressure is applied through the axial passageway above the sealing member whereupon the differential in pressure effected across the sealing member is also effected across a slidable piston reciprocatingly received within the releasable coupling. The piston moves into a position which enables a male member to be released and separated from a female member. When the male and female members are released and separated from one another, the lower part of the tubing string is disconnected from the upper part of the tubing string.
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