Fluid handling – With repair – tapping – assembly – or disassembly means – Tapping a pipe – keg – or apertured tank under pressure
Patent
1983-10-24
1985-05-14
Walton, George L.
Fluid handling
With repair, tapping, assembly, or disassembly means
Tapping a pipe, keg, or apertured tank under pressure
138 94, 408100, F16K 4300, F16L 5510
Patent
active
045165980
ABSTRACT:
A safety valve adapted to be mounted on a submerged section of oil well pipe for sealing the pipe if an oil leak occurs in the pipe above the valve location. The valve includes a collar rotatably mounted on the pipe and is located between a pair of positioning blocks attached to the pipe. The collar forms a liquid tight chamber extending on diametrical opposite sides of the pipe. A circular cutting blade is slidably rotatably mounted in one side of the chamber and has an operating shaft which extends outwardly through an end wall opening formed in the collar. The blade is rotated by external means applied to the end of the operating shaft and cuts a hole in the wall of the pipe. A plug is slidably rotatably mounted in the opposite side of the chamber from the cutting blade and has a shaft which extends outwardly through another end wall opening formed in the collar. The collar is rotated 180.degree. on the pipe after the cutting blade has formed a hole in the pipe and the plug is advanced by external means applied to the shaft end of the plug into the pipe bore through the cut hole to seal the pipe. The safety valve can be applied at various locations on a well pipe and will not affect the structure or wall of the pipe until actually needed to seal the pipe should a leak occur.
REFERENCES:
patent: 419974 (1890-01-01), Smith
patent: 511327 (1893-12-01), Eley
patent: 3260539 (1966-07-01), Herron
patent: 3799182 (1974-03-01), Long
patent: 3948282 (1976-04-01), Yano
patent: 4431017 (1984-02-01), Willemsen
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