Method and apparatus for setting a cement plug in the wide-mouth shaft of an earth cavern
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United States of America Patent
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-
Jul 31, 1984
Grant Date -
N/A
app pub date -
Apr 4, 1983
filing date -
Apr 4, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention disclosed herein is a method and apparatus for setting a cement plug in the wide-mouth shaft of an earth cavern. The apparatus includes a deflated balloon with a liquid fill pipe therein. In practice, the cavern is first filled with a liquid. Following this, the balloon is encased in a releasable girdle and lowered into the cavern through a casing, along with a cement fill pipe which remains above the balloon. When the balloon reaches a certain point in the cavern, below the casing, the girdle is released from the balloon and the balloon is filled with a liquid to inflate it. The inflated balloon seats against the cavern walls to provide an excellent support for the cement, which is pumped down the cement fill pipe.
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