High strength particulates
OwnerJohn W. Graham, A. Richard Sinclairinventors
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Abstract
An improved particulate material for use in treating subterranean formations as a proppant and/or as a fluid loss agent in hydraulic fracturing and as a screening material in gravel packing comprised of heat curable particles capable of forming a cohesive mass, said particles comprised of a high strength center, a coupling agent chemically bound to the center with a heat curable resin coated over the center.
Claims18
A free-flowing high strength particle, useful in the production of shell molds and cores in the foundary industry and in the treatment of subterranean formations, comprised of high strength centers and a heat curable resin coating and manufactured through process steps comprising:
- incorporating a coupling agent into said heat curable resin;
- coating said centers with a coupling agent;
- reacting said coupling agent with said centers;
- heating said centers to a temperature above the melting point of said resin;
- adding said resin to said centers;
- mixing said resin and said centers until said resin is dispersed over the surface of said centers;
- and
- quenching said mixture with water.
A sand coated with a heat curable novolac resin, manufactured through process steps comprising:
- incorporating an aminoalkylsilane in said resin during its manufacture;
- spraying said sand with an aqueous solution of an aminoalkylsilane;
- heating said sand to a temperature above the melting point of said resin;
- adding said resin to said sand;
- mixing said resin and said sand until said resin is dispersed over the surface of said sand;
- and
- quenching the mixture of said resin and said sand with a solution of water and hexamethylenetetramine.
Dependencies are inferred from the claim text.