Wells – Valves – closures or changeable restrictors
Patent
1977-11-07
1980-01-15
Purser, Ernest R.
Wells
Valves, closures or changeable restrictors
166 50, E21B 4300
Patent
active
041834070
ABSTRACT:
An exhaust system and process for removing contaminant vapors from contaminated underground areas is described. The exhaust system includes a conduit directed underground with a lower end extending to the area of contamination and an upper end opening above the ground surface, a plurality of elongate perforated collection elements in communication with and extending angularly from the lower end of the conduit for receiving said vapors from the contaminated ground, a manifold connecting the collection elements to the lower end of the conduit and an exhaust means disposed in the upper end of the conduit for drawing the vapors into the collection elements from the area of contamination through the conduit and expelling the same into the atmosphere or into a suitable collection device.
REFERENCES:
patent: 166357 (1875-08-01), Gray
patent: 2375865 (1945-05-01), Nebolsine
patent: 2385298 (1945-09-01), Muskat
patent: 2434239 (1948-01-01), Zublin
patent: 2508949 (1950-05-01), Howard
patent: 2518292 (1950-08-01), De Anglis
patent: 2740476 (1956-04-01), D'Audiffret et al.
patent: 3261401 (1966-07-01), Karr
patent: 4026355 (1977-05-01), Johnson et al.
Francis Richard
Nichols Jr. Nick A.
Purser Ernest R.
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