| 摘要 |
The present invention is directed to an oil-free, water-soluble, liquid, polymer dispersion for use in thickening aqueous mediums, particularly completion and workover fluids used in the oil and gas drilling business. Th e dispersions of the present invention are comprised of hydroxyethyl cellulose and propylene glycol derivatives, preferably both propylene glycol polyether polyols and an aliphatic propylene glycol ether. Optionally these dispersion s include water. Because of their low toxicity, these dispersions are particularly useful for drilling in offshore environments. These composition s rapidly disperse in and viscosify a variety of brines, including sea water a nd other light brines, with minimum shear and without fisheye formation.</SDOAB >
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