Single plug arrangement, lock therefor and method of use
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 6, 1991
Grant Date -
N/A
app pub date -
Mar 30, 1990
filing date -
Mar 30, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A single wiper is releasably and sealably positioned adjacent the lower end an operating string and locked therewith to prevent premature release from the operating string upon manipulation of the operating string. The sealing relationship between the wiper and the operating string prevents communication of operating string pressure from the operating string to the resilient ribs of the wiper adjacent the position of the wiper on the operating string. When a pump down plug is sealably seated within the bore of the wiper, fluid pressure is confined to act on a piston between the operating string and the wiper to unlock the wiper from the operating string so that it may be released therefrom.
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