Thermoset particles with enhanced crosslinking, processing...

C - Chemistry – Metallurgy – 08 – J

Patent

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C08J 3/16 (2006.01) C08J 3/24 (2006.01) C09K 8/035 (2006.01) C09K 8/80 (2006.01)

Patent

CA 2565816

Thermoset polymer particles are used in many applications requiring lightweight particles possessing high stiffness, strength, temperature resistance, and/or resistance to aggressive environments. The present invention relates to the use of methods to enhance the stiffness, strength, maximum possible use temperature, and environmental resistance of such particles. One method of particular interest is the application of post- polymerization process step(s) (and especially heat treatment) to advance the curing reaction and to thus obtain a more densely crosslinked polymer network. The most common benefits of said heat treatment are the enhancement of the maximum possible use temperature and the environmental resistance. The present invention also relates to the development of thermoset polymer particles. It also relates to the further improvement of the key properties (in particular, heat resistance and environmental resistance) of said particles via post-polymerization heat treatment. Furthermore, it also relates to processes for the manufacture of said particles. Finally, it also relates to the use of said particles in the construction, drilling, completion and/or fracture stimulation of oil and natural gas wells; for example, as a proppant partial monolayer, a proppant pack, an integral component of a gravel pack completion, a ball bearing, a solid lubricant, a drilling mud constituent, and/or a cement additive.

L'invention concerne des particules polymères thermodurcies que l'on utilise dans de nombreuses applications nécessitant des particules légères de meilleures rigidité, résistance, résistance à la température, et/ou résistance à des milieux agressifs. L'invention concerne l'utilisation de procédés permettant de renforcer la rigidité, la résistance, la température d'utilisation maximale possible, et la résistance aux milieux de ces particules. En particulier, l'invention concerne l'application d'une ou de plusieurs étapes du processus de post-polymérisation ( plus précisément le traitement thermique) pour améliorer la réaction de durcissement et, par conséquent, obtenir un réseau polymère plus densément réticulé. Les avantages les plus courants de ce traitement thermique sont améliorer la température d'utilisation maximale possible et la résistance aux milieux. L'invention concerne également l'élaboration de particules polymères thermodurcies., ainsi que l'amélioration des propriétés principales de ces particules (notamment la résistance thermique et la résistance aux milieux) par le biais du traitement thermique post-polymérisation. De plus, l'invention concerne des procédés de fabrication de ces particules et, enfin, leur utilisation dans la construction, le forage, la complétion et/ou la stimulation de la fracture des puits de pétrole et de gaz naturel; par exemple comme monocouche partielle d'agent de soutènement, ensemble d'agents soutènement, composant intégral de complétion de filtre à gravier, roulement à billes, lubrifiant solide, constituant de boue de forage et/ou additif de ciment.

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