Packing system and method for boreholes
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United States of America Patent
Stats
-
Sep 11, 2001
Grant Date -
N/A
app pub date -
Feb 3, 2000
filing date -
Feb 4, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The packer includes the usual outer bladder, which is inflated against the sides of the borehole, to seal around a work-pipe. But the packer also includes an inner bladder. The packer is mechanically secured to the work-pipe by the grip of the inner bladder around the work-pipe. The inner bladder is sucked outwards by a vacuum pump, to enable the packer to be moved along the work-pipe. The same port through which vacuum was admitted to the inner bladder can then be used to admit pressurized fluid to the outer bladder.
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