US 6,555,506 B2Granted

Corrosion inhibitors

AssigneeIllinois Tool Works Inc.

InventorsWilliam Hopkins, Christopher Nettleship

Life of this patent

Estimating the term…

Abstract

A method of preventing corrosion in pipelines comprising draining pipeline of all residual compounds, blowing through with nitrogen and rinsing with a corrosion inhibiting rinsing agent.

Claims7

Dependent claims

A rinsing agent comprising at least one Fatty ester, Rape Seed Oil, Sunflower Oil, Polydiethanolamine, Triethanol Amine, at least one Tall Oil Fatty Acid, at least one polyether carboxylic acid lime scale dispersant, Demineralized water and at least one Fatty alcohol polyglycol ester.

Dependencies are inferred from the claim text.

Facts

Application: 09/995,646Filed 29 Nov 2001 · division
Priority: GB 00429923 Feb 2000
Published: US 2002/0060313 A123 May 2002
Granted: 29 Apr 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

E21B 17/20
Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings: flexible or articulated drilling…
E21B 41/02
Equipment or details not covered by groups E21B15/00 - E21B40/00: in situ inhibition of corrosion in boreholes or wells
Y10S 507/927
Earth boring, well treating, and oil field chemistry: well cleaning fluid
Y10S 507/928
Well cleaning fluid: spacing slug or preflush fluid

Family

Application09/792,761Parent of this division · filed 23 Feb 2001
US 2002/0060313 A1Pre-grant publication · published 23 May 2002
US 6,467,492 B2Parent of this division
US 2001/0045546 A1Published application
US 6,555,506 B2This patent

From the US filing history. Foreign family members aren’t listed.

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