Method for restricting uncontrolled fluid flow through a pipe

Details Method for restricting uncontrolled fluid flow through a pipe Method for restricting uncontrolled fluid flow through a pipe

1981-01-07

1983-08-02

Cohan, Alan

Fluid handling

Processes

Affecting flow by the addition of material or energy

137340, F17D 114

Patent

active

043960316

ABSTRACT:
A method for restricting uncontrolled fluid flow through a pipe by positioning a heat conductor through the pipe wall and in contact with fluid flowing through the pipe and cooling the heat transfer surfaces of the heat conductor to freeze a portion of the flowing fluid on the heat transfer surfaces. The freezing is continued to form a plug which substantially restricts or stops flow through the pipe.

REFERENCES:
patent: 3498071 (1970-03-01), Tremont
patent: 3631928 (1972-01-01), Dalzell
patent: 3647000 (1972-03-01), Rowley et al.
patent: 3738424 (1973-06-01), Osmun et al.
patent: 3827282 (1974-06-01), Brister
patent: 4082109 (1978-04-01), Sun
patent: 4125159 (1978-11-01), Vann
patent: 4203472 (1980-05-01), Dulaney
patent: 4222824 (1980-09-01), Flockenhaus
Staff, "Quick Freeze Plug Reduces Testing and Repair Costs", Pipe Line Industry, pp. 37-39, Mar. (1977).
R. P. Deplancke, "How the Frozen Plug Method Found an Elusive Pipeline Leak", Petrochemical International, Col. XII, No. 1, pp. 46-47, Jan. (1972).
Don W. Noren, "A Cure for Mold Cooling Headaches", Plastics Technology, pp. 122-125, Apr. (1978).
Staff, "Stepped Thermal Pin Heat Conductors", Thermal Pin Design News, pp. 2-3, vol. 1, No. 3.

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