Closure device for upper head of coking drums
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United States of America Patent
Stats
-
May 23, 1995
Grant Date -
N/A
app pub date -
Jun 13, 1994
filing date -
Jun 13, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A closure device adapted for attachment onto the upper head of a coking drum to prevent hot vapors escaping during drum decoking operations. The closure device includes a cylindrical-shaped housing having a rotatable ball valve and horizontal elongated stem provided in its lower portion, and a cover unit including a packing gland provided at the housing upper end. A rotatable cutting tool provided within the housing above the ball valve has a drive rod extending upwardly through the cover unit packing gland. During operations, the ball valve is opened and the drive rod and its attached cutting tool can be extended downwardly through the ball valve cylindrical-shaped opening into the coking drum and rotated, so as to cut and dislodge coke deposited in the drum.
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