Resin-Coated Proppant And Methods Of Use
AssigneeBASF SE
InventorsChristopher Tanguay, Rajesh Kumar
Life of this patent
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Abstract
A proppant comprises a particle and a polymeric coating disposed about the particle. The polymeric coating comprises the reaction product of a novolac polyol, an isocyanate, and an azole. The novolac polyol has a number average molecular weight of from about 200 to about 1000 g/mol. A method of forming the proppant comprises the steps of providing the particle, providing the novolac polyol, providing the isocyanate, and providing the azole. The method also includes the steps of combining the novolac polyol, the isocyanate, and the azole to react and form the polymeric coating and coating the particle with the polymeric coating to form the proppant.
Claims20
A proppant for hydraulically fracturing a subterranean formation, said proppant comprising:
- A. a particle;
- and
- B. a polymeric coating disposed about said particle and comprising the reaction product of;
- (1) a novolac polyol having a number average molecular weight of from about 200 to about 1000 g/mol,
- (ii) an isocyanate, and
- (iii) an azole.
A method of forming a proppant for hydraulically fracturing a subterranean formation, wherein the proppant comprises a particle and a polymeric coating disposed about the particle and the polymeric coating comprises the reaction product of a novolac polyol, an isocyanate, and an azole, said method comprising the steps of:
- A. providing the particle;
- B. providing the novolac polyol having a number average molecular weight of from about 200 to about 1000 g/mol;
- C. providing the isocyanate;
- D. providing the azole;
- E. combining the novolac polyol, the isocyanate, and the azole to react and form the polymeric coating;
- and
- F. coating the particle with the polymeric coating to form the proppant.
A method of hydraulically fracturing a subterranean formation which defines a subsurface reservoir with a mixture comprising a carrier fluid and a proppant comprising:
- A. a particle;
- and
- B. a polymeric coating disposed about the particle and comprising the reaction product of;
- (i) a novolac polyol having a number average molecular weight of from about 200 to about 1000 g/mol,
- (ii) an isocyanate comprising polymeric diphenylmethane diisocyanate and having an NCO content of about 31.5 weight percent, and
- (iii) an azole selected from the group of oxazoles, isoxazoles, and combinations thereof,
- said method comprising the step of pumping the mixture into the subsurface reservoir to fracture the subterranean formation.
Dependencies are inferred from the claim text.