The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 2015
Filed:
Aug. 20, 2010
Dana Aytkhozhina, Middlesex, GB;
Roman Vladimirovich Bulgachev, Middlesex, GB;
Martin Alexander Ross, Middlesex, GB;
Allan Jeffrey Twynam, Middlesex, GB;
Dana Aytkhozhina, Middlesex, GB;
Roman Vladimirovich Bulgachev, Middlesex, GB;
Martin Alexander Ross, Middlesex, GB;
Allan Jeffrey Twynam, Middlesex, GB;
BP EXPLORATION OPERATING COMPANY LIMITED, Middlesex, GB;
Abstract
Gravel pack composition containing gravel and a water-in-oil emulsion including (a) an organic continuous phase comprising 0.1 to 5 vol % of the emulsion of non-ionic or cationic surfactant and 0.25 to 3 vol % of the emulsion of sorbitan ester; (b) a dispersed aqueous phase comprising 0.05 to 3 vol % of the emulsion of a partial ester of a polyol with at least one C6 to C22 fatty acid and at least one of an acid, acid precursor, and a chelating agent; and (c) a density control agent. The fluid can display a delayed break of up to about 72 hours to enable clean-up of mud cake.