abstract |
Aqueous compositions including crosslinkable hydroxyethyl carboxyethyl cellulose provide aqueous solutions particularly suitable for use in oil or gas drilling, fracturing, flow diversion, completion and workover. The aqueous compositions provided include a crosslinked hydroxyethyl carboxyethyl cellulose, crosslinking being effected by a polyvalent metal in the form of an inorganic or organic acid salt, hydroxide or oxide. |