Source: http://www.google.com/patents/US5977032?dq=6289460
Timestamp: 2014-04-16 23:00:23
Document Index: 378463411

Matched Legal Cases: ['application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09', 'application No. 09']

Patent US5977032 - Acidic surfactant composition and method for cleaning wellbore and flowline ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided inorganic particulate matter from wellbore and flowline surfaces using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, an acid and an alkyl alcohol....http://www.google.com/patents/US5977032?utm_source=gb-gplus-sharePatent US5977032 - Acidic surfactant composition and method for cleaning wellbore and flowline surfaces using the surfactant compositionAdvanced Patent SearchPublication numberUS5977032 APublication typeGrantApplication numberUS 09/161,040Publication dateNov 2, 1999Filing dateSep 26, 1998Priority dateSep 26, 1998Fee statusPaidAlso published asCA2345305A1, CA2345305C, EP1115960A1, EP1115960B1, US6110885, WO2000019062A1Publication number09161040, 161040, US 5977032 A, US 5977032A, US-A-5977032, US5977032 A, US5977032AInventorsAlbert F. ChanOriginal AssigneeAtlantic Richfield CompanyExport CitationBiBTeX, EndNote, RefManPatent Citations (20), Non-Patent Citations (17), Referenced by (21), Classifications (13), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetAcidic surfactant composition and method for cleaning wellbore and flowline surfaces using the surfactant compositionUS 5977032 AAbstract A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided inorganic particulate matter from wellbore and flowline surfaces using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, an acid and an alkyl alcohol.
I claim: 1. A method for removing deposits comprising heavy hydrocarbonaceous materials and finely divided inorganic particulate materials from a well, the method comprising:a) injecting an aqueous surfactant composition comprising an aqueous solution containing:1) an acidic material consisting of about 0.1 to about 30.0 weight percent of an organic acid selected from the group consisting of acetic, formic, propionic and citric acids or about 0.5 to about 15.0 weight percent of hydrochloric acid; 2) about 0.25 to about 10.0 weight percent of an alkyl polyglycoside surfactant selected from alkyl polyglycosides containing alkyl groups containing from about 9 to about 16 carbon atoms and mixtures thereof; 3) about 0.25 to about 10.0 weight percent of an ethoxylated alcohol selected from the group consisting of ethoxylated alkyl alcohols containing from about 6 to about 16 carbon atoms in the alkyl alcohol and from about 2.5 to about 6 ethylene oxide groups and mixtures thereof; and, 4) about 0.1 to about 6.0 weight percent of at least one alkyl alcohol containing from about 4 to about 8 carbon atoms; b) retaining the aqueous surfactant composition in the well for a selected time period; and c) injecting an aqueous solution into the well. 2. The method of claim 1 wherein the selected time period is from about 1 to about 4 hours.
DESCRIPTION OF PREFERRED EMBODIMENTS In the discussion of the FIGS., various pumps, valves and the like necessary to achieve the flows described have not been shown in the interest of conciseness. All concentrations are by weight percent of active ingredient in the aqueous solution unless otherwise stated.
While the aqueous surfactant compositions may be used at substantially any temperature between their freezing points and their boiling points, it is preferred that they be used at temperatures above about 120 lower temperatures, longer contact times may be required to remove the deposits.
SUMMARY OF THE INVENTION According to the present invention, it has been found that such deposits can be effectively removed by the use of an acidic alkyl polyglycoside surfactant composition (the aqueous surfactant composition) consisting essentially of an aqueous solution containing from about 0.25 to about 10.0 weight percent of an alkyl polyglycoside surfactant selected from alkyl polyglycosides containing alkyl groups containing from about 9 to about 16 carbon atoms and mixtures thereof; from about 0.25 to about 10.0 weight percent of an ethoxylated alcohol selected from the group consisting of ethoxylated alkyl alcohols containing from about 6 to about 16 carbon atoms in the alkyl alcohol and from about 2.5 to about 6 ethylene oxide groups and mixtures thereof, an acidic material consisting of about 1.0 to about 30.0 weight percent of an organic acid selected from the group consisting of acetic, formic, propionic and citric acids or about 0.5 to about 15.0 weight percent of hydrochloric acid and, from about 0.1 to about 6.0 weight percent of at least one alkyl alcohol containing from about 4 to about 8 carbon atoms. The alkyl polyglycoside surfactant has a DP number from about 1.3 to about 1.8.
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ChanMethod for pickling a work string using dispersed solvent-in-acid fluid designUS7776798Feb 1, 2007Aug 17, 2010Akzo Nobel Surface Chemistry LlcQuaternary ammonium salts as thickening agents for aqueous systemsUS20100307746 *Nov 21, 2008Dec 9, 2010M-I LlcMethods of cleaning wellbores and analyzing wellbore fluidsCN1112502C *Aug 25, 2000Jun 25, 2003王松One-step completing oil well packing and filling and well cleaning method and toolEP1103697A1 *Nov 23, 2000May 30, 2001ENI S.p.A.Process for reducing the adsorption of polymers onto rock matrixEP1273756A1Jun 12, 2001Jan 8, 2003Schlumberger Holdings LimitedSurfactant compositions for well cleaningWO2001023703A1 *Sep 15, 2000Apr 5, 2001Akzo Nobel NvA method of improving the permeability of an underground petroleum-containing formationWO2002027140A1 *Sep 18, 2001Apr 4, 2002Cognis Deutschland GmbhMethod for increasing the transportation capacity of crude oilWO2011132052A1Apr 14, 2011Oct 27, 2011Eni S.P.A.Process for the removal of deposits from an oil or gas well, and/or from the surface structures, and/or from the equipment connected therewith, and/or from hydrocarbon bearing formations* Cited by examinerClassifications U.S. Classification507/211, 507/269, 507/928, 166/293, 507/261, 507/927, 507/933International ClassificationC09K8/52Cooperative ClassificationY10S507/927, Y10S507/933, Y10S507/928, C09K8/52European ClassificationC09K8/52Legal EventsDateCodeEventDescriptionMay 2, 2011FPAYFee paymentYear of fee payment: 12May 2, 2007FPAYFee paymentYear of fee payment: 8May 1, 2003FPAYFee paymentYear of fee payment: 4Feb 8, 1999ASAssignmentOwner name: ATLANTIC RICHFIELD COMPANY, TEXASFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHAN, ALBERT F.;REEL/FRAME:009750/0045Effective date: 19980925RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google