Coating processes – Interior of hollow article coating – Vacuum or pressure utilized
Patent
1992-04-06
1993-10-19
Pianalto, Bernard
Coating processes
Interior of hollow article coating
Vacuum or pressure utilized
427239, B05D 722
Patent
active
052543668
ABSTRACT:
A method for treating tubulars, e.g. a pipeline, wherein an ungelled gelatin solution is mixed with fluids flowing through the tubular to deposit a treatment layer onto the wall of the tubular. The ungelled gelatin is injected into the flowing fluids at a temperature which is at or above the temperature of the fluids in the pipeline. This keeps the gelatin solution liquid (i.e. ungelled) even after mixing with the fluids. Gelatin derived from collagen is mixed with a liquid (e.g water) and heated. A separate treating solution (e.g. anti-freeze, corrosion inhibitor, and/or a drag reducer) can be added into the ungelled gelatin solution as it is mixed. The concentration of gelatin in the solution concentration of gelatin in said ungelled solution is the maximum amount which will allow the solution to remain ungelled at said the temperature of the flowing fluids.
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Encylopedia of Chemical Technology, Kirk-Othmer, Third Edition, vol. 11, J. Wiley & Sons, N.Y. pp. 711-715 and 911-920.
Pipeline Pigging Technology, J. N. H. Tiratsoo, Gulf Publishing Co. Houston, Tex., May, 1989, pp. 139-157.
Atlantic Richfield Company
Faulconer Drude
Pianalto Bernard
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