Loading patent…
AssigneeSchlumberger Technology Corporation
InventorsRobert Seth HARTSHORNE, Karene Guilaine URGIN, Lynne Patricia CRAWFORD, Philip F. SULLIVAN, Paul Richard HOWARD, Trevor Lloyd HUGHES, Timothy G. J. JONES
Estimating the term…
An aqueous solution comprising a thickening polymer with diol groups distributed along it, such as guar or other polysaccharide, is cross linked with a cross-linker which contains a plurality of boroxole groups of the partial formula wherein R1 is hydrogen or a substituent group or an attachment to the remainder of the cross-linker molecule, R2 is hydrogen or a substituent group, R3 is hydrogen or an aliphatic or aromatic group and the carbon atoms joined by a double bond are part of an aromatic ring. The thickened fluid may be a wellbore fluid and may be a hydraulic fracturing fluid in which a particulate proppant is suspended.
A thickened aqueous fluid comprising a thickening polymer with diol groups distributed along it and a cross-linker for the polymer where the cross-linker contains a plurality of groups of the partial formula
A method of thickening an aqueous fluid comprising incorporating into an aqueous liquid:
Dependencies are inferred from the claim text.