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US 6,582,819 B2Granted
Low density composite proppant, filtration media, gravel packing media, and sports field media, and methods for making and using same
AssigneeBorden Chemical, Inc.
InventorsRobert R. McDaniel, Johannes A. Geraedts
Life of this patent
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Abstract
Low density composite particles made of a binder and filler material are provided for use in subterranean formations. The filler includes low density filler and optionally other filler. The binder includes a polymer and optionally cement. The particles may be employed as proppants useful to prop open subterranean formation fractures. The particles are also useful for gravel packing in subterranean formations, water filtration and artificial turf for sports fields. Methods of making the composite particles are also disclosed.
Claims53
A composite particle comprising:
- a substantially homogeneous formed particle comprising:
- a first portion of a binder, wherein the first portion is at least partly cured;
- filler particles dispersed throughout the first portion of binder, wherein particle size of the filler particles ranges from about 0.5 to about 60 μm;
- and
- an optional second portion of a binder coating the formed particle;
- wherein the first and second portions of binder have an absence of cement;
- wherein at least one member of the group consisting of the first portion of binder or the second portion of binder comprises a cold-set resin,
- wherein the composite particle has a bulk density of 0.50 to 1.30 grams per cubic centimeter.
5 more elements
A composite particle comprising:
- a substantially homogeneous formed particle comprising:
- a core comprising a binder and filler particles dispersed throughout the binder,
- wherein particle size of the filler particles ranges from about 0.5 to about 60 μm;
- wherein the composite particle has a bulk density of 0.50 to 1.30 grams per cubic centimeter, and a grain density of 0.90 to about 2.2 gr/cm3;
- optionally the particle has a resin coating.
2 more elements
Dependencies are inferred from the claim text.