Shell Oil Comapny

Adrianus M Hagelaars

David R Davies

Edwin A Richardson

Jacobus J Zuiderwijk

Sand grains coated with a solid non-cured epoxy resin with a softening point above 35.degree. C. are placed in a well for gravel pack, well repair or fracturing purposes. The epoxy resin softens at formation temperature and reacts with a hardener (such as a tertiary amine) diluted in water present in the pore space of the mass of sand grains. A consolidated mass of sand grains is thus obtained. The coated sand grains can be transported to the well site and stored over long periods at relatively high temperatures without risk of quality decrease.

Method of placing and consolidating a mass of particulate material and

In a well treating process for consolidating a mass of particles with an epoxy resin precipitated from a resin-forming solution, a significant improvement is provided by using: a polyamino curing agent, a particular ratio of curing agent to epoxide, and a pretreatment which wets the particles with an aqueous liquid that contains an effective proportion of a dimethylaminomethyl-substituted phenol.

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Rijswijk, Netherlands

Adrianus M Hagelaars