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Organic Slurry of Hydroxyethyl Cellulose for Use in Oil Fields

IP.com Disclosure Number: IPCOM000168053D
Publication Date: 2008-Feb-28
Document File: 1 page(s) / 18K

Publishing Venue

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Abstract

Organic slurries comprising hydroxyethyl cellulose, a water-soluble mono-, di- or tripropylene glycol derivative, and an organic-soluble thickening agent are advantageous for use in oil fields application, such as drilling fluids. Optionally these slurries may include water.

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Organic Slurry of Hydroxyethyl Cellulose for Use in Oil Fields

The use of polymers in water-based fluids – including brines – which are used in well drilling and treating fluids to improve viscosity, solids removal, and/or filtration control is well known. Hydroxyethyl cellulose (HEC) is typically the preferred hydrophilic polymeric material chosen to provide the desired thickening of brines and water-based fluids in the oil and gas drilling and recovery industries. Compositions including HEC have long been used to viscosify drilling fluids, workover fluids, completion fluids, packer fluids, well treating fluids, subterranean formation treating fluids, spacer fluids, fracturing fluids, hole abandonment fluids and other aqueous fluids in which an increase in viscosity is desired.
Particularly useful organic slurries of hydroxyethyl cellulose for use in the oil field comprise hydroxyethyl cellulose, a water-soluble mono-, di- or tripropylene glycol derivative, and an organic-soluble thickening agent. Optionally these slurries may include water.  The monoether or diether derivatives of mono-, di- or tripropylene glycol – particularly a monoether such as the n-butyl ether or methyl ether – are useful. Dipropylene glycol monoether, particularly dipropylene glycol monomethylether is preferred.

Useful thickening agents are hydroxypropyl celluloses which are commercially available under the trademark  KLUCEL, or hydro...