Patent ID: 9488027
Filing Date: 2016-11-08
CPC Classification: B82Y,E21B

Claim Text:
1. A downhole composite component, comprising: a tubular member comprising a hollow cylindrical mandrel of a downhole plug, or a tubular housing of a downhole tool or component, the hollow cylindrical mandrel of the downhole plug, or the tubular housing, formed entirely from a fiber reinforced polymer matrix composite, the fiber reinforced polymer matrix composite comprising: a polymer matrix, the polymer matrix having an unfilled matrix compressive modulus of elasticity; a nanoparticle filler comprising a plurality of derivatized nanoparticles, the derivatized nanoparticles comprising a homogeneous mixture in the polymer matrix, the derivatized nanoparticles comprising a plurality of derivatized fullerene nanoparticles other than carbon nanotubes, graphene, graphene fiber, nanodiamond, silica, clay, mineral, or metal nanoparticles, or a combination thereof dispersed within the polymer matrix, the polymer matrix and dispersed nanoparticle filler having a filled matrix compressive modulus of elasticity, the filled matrix compressive modulus of elasticity being greater than the unfilled matrix compressive modulus of elasticity, and the derivatized nanoparticles providing a filled matrix compressive modulus of elasticity having a variability that is less than a variability of a filled matrix compressive modulus of elasticity using a mixture of non-derivatized nanoparticles in the polymer matrix; and a plurality of reinforcing fibers, the plurality of reinforcing fibers embedded within the polymer matrix, the polymer matrix and plurality of reinforcing fibers having the form of the tubular member, the tubular member configured to receive a compressive stress, wherein the polymer matrix composite has a compressive strength and a bending strength configured for use as the hollow cylindrical mandrel or tubular housing.