Method for drying pipelines

Details Method for drying pipelines Method for drying pipelines

1980-02-19

1981-03-10

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 12, F26B 300

Patent

active

042545595

ABSTRACT:
The interior surface of a pipeline is dried by sequentially passing through the pipeline (a) an aqueous cross-linked gelled pig, (b) a fluid mobility buffer comprising a non-crosslinked gelled ankanol of from one to three carbon atoms, (c) a dessicating amount of a liquid alkanol from one to three carbon atoms. For example, a pipeline was dried by sequentially passing through it (a) a borate cross-linked hydroxypropyl guar gum pig, (b) a fluid mobility buffer comprising methanol thickened with hydroxypropyl cellulose, and (c) methanol.

REFERENCES:
patent: 4003393 (1977-02-01), Jaggard et al.
patent: 4210206 (1980-07-01), Ely et al.

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