Method of drying pipelines and putting gas thereinto

Details Method of drying pipelines and putting gas thereinto Method of drying pipelines and putting gas thereinto

1979-12-12

1982-08-31

Cohan, Alan

Fluid handling

Processes

Cleaning, repairing, or assembling

137205, 15409, 134 21, 134 22C, F17D 102

Patent

active

043467261

ABSTRACT:
The invention relates to total elimination of aqueous deposits in pipelines intended for transporting gaseous fluids, such as a natural gas. The method involves sending, by a nozzle at an end of at least one compressed air ejector, connected with the pipeline, a pressurized driving fluid (for example, under 4 to 8 bars) into a pipeline which aspirates and entrains the gaseous fluid (air+water vapor), the mixture of fluids then being discharged at the other end of the ejector. In practice, multistage ejectors for example three ejectors in series, are used. According to a variant of the method, the step of putting gas which is to be transported into the pipeline is done while the vacuum is maintained in the ejector or ejectors so as always to be outside the limits of flammability of this gas. The method is particularly suitable for drying natural gas pipelines and then putting the pipelines under pressure.

REFERENCES:
patent: 681854 (1901-09-01), Howe
patent: 1135834 (1915-04-01), Morton
patent: 1203841 (1916-11-01), Bancel
patent: 1447103 (1923-02-01), Schmidt
patent: 1784222 (1930-12-01), Crickmer
patent: 3435841 (1969-04-01), Williams
patent: 3695055 (1972-10-01), Bruce
patent: 3926664 (1975-12-01), Verreydt
patent: 4016896 (1947-04-01), Oikarinen

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