Quadra-seal method and apparatus for operations upon fluid pressure containment bodies
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United States of America Patent
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-
Jun 1, 1999
Grant Date -
N/A
app pub date -
Nov 26, 1997
filing date -
Nov 26, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for injecting sealant into the packing chamber of a valve requiring no venting of pressure within the valve. The apparatus which includes an interior valve is attached to the valve body by drilling and tapping a connection or by friction welding. A high pressure packing gland is attached to the apparatus and a drill bit is passed through the combination to complete an opening into the packing chamber. The drill bit is withdrawn past the interior valve, which is closed and then out of the combination. The packing gland is removed and a sealant injection device attached. The interior valve is opened and sealant injected into the packing chamber. The valve is closed, a completion plug installed into the end of the fitting, and a completion cap with a sealing ring is installed over the entire valve and fitting, thereby forming multiple redundant seals.
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