Low temperature coated particles for use as proppants or in gravel packs, methods for making and using the same

A particle, coating technology, applied in chemical instruments and methods, coatings, powder coatings, etc., to achieve freight savings, emissions minimization, and energy savings

Inactive Publication Date: 2010-02-03
HEXION INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have several technical and cost limitations

Method used

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  • Low temperature coated particles for use as proppants or in gravel packs, methods for making and using the same
  • Low temperature coated particles for use as proppants or in gravel packs, methods for making and using the same
  • Low temperature coated particles for use as proppants or in gravel packs, methods for making and using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0259] This test was performed to determine the properties of the coated particles of the present invention. The coating cycle is as follows. Will 1000 grams 12 / 18 medium density ceramic particles were added to a Hobart laboratory mixer at room temperature. Then start the mixer agitator. Then 0.8 grams of A1100 (aminopropyltriethoxysilane) was added and the timer was started (0:00 minutes). After 30 seconds, 10.0 gms EX262E (liquid resole, phenol-formaldehyde liquid resole) was added. When the timer was at 2 minutes, 18.4 grams of SD909A novolac powder (with 15% hexamethylenetetramine) was added with continued stirring (about 2.4% total organics on the granules). When the timer was at 12 minutes, the material was free flowing and removed from the mixer. The product was then tested for 24 hour UCS bond strength at 1000 psi and 200°F and found 590 psi.

Embodiment 2

[0261] This test was performed to determine the properties of the coated particles of the present invention. The coating cycle is as follows. Will 1000 grams 12 / 18 medium density ceramic particles were added to a Hobart laboratory mixer at room temperature. Then start the mixer agitator. Then 0.8 grams of A1100 (aminopropyltriethoxysilane) was added and the timer was started (0 minutes). After about 30 seconds, 10.0 gms EX262E (liquid resole) was added. When the timer is at 2 minutes, add 33.2 grams of SD672D powder (novolac, hexamethylenetetramine free) with continued stirring (about 4% total organics on the granules); SD672D powder has + / -100 Purpose granularity. When the timer was at 12 minutes, the material was free flowing and removed from the mixer. The product was then tested for 24 hour UCS bond strength at 1000 psi and 200°F and found 1075 psi.

Embodiment 3

[0263] A curable resin coating was formed by adding 0.4 grams of coupling agent (A-1100 silane) to 1 kilogram of substrate under constant stirring. Silane was followed by liquid resole resin (OWR-262E) from Hexion Specialty Chemicals, Inc., Louisville, Kentucky, 15 seconds into the cycle. Powdered novolak FD900-A (with 7% hexamethylenetetramine for preparation of samples C, D, each from Hexion Specialty Chemicals, Inc., Louisville, Kentucky) was then added at 1 minute on cycle time. and G), or powdered novolac SD-909A (with 15% hexamethylenetetramine for the preparation of samples A, B, E and F). The material was mixed for an additional 4 minutes and discharged from the mixing device. Using the procedure described above, the performance changes were analyzed while evaluating alternative resins, resin content, particle size, and substrates. The concentration of hexamethylenetetramine in the novolac powders therefore varied from 7% to 15% depending on the powder used in each f...

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Abstract

Disclosed herein are free flowing coated particles and low temperature methods of making same. Each particle has a curable coating disposed upon a substrate. The substrate is a particulate substrate including an inorganic material, a particulate substrate including an organic material, a composite substantially homogeneous formed particle including a first portion of an at least partly cured binder and filler particles, or a hybrid particle having an inorganic particle as a core and a composite coating including at least partially cured resin and filler. The curable coating includes a continuous phase including resole resin and reactive powder particles embedded or adhered to the continuous phase. The reactive powder particles typically include resole resin, novolak resin, polyester, acrylic and / or urethane. A method including applying a coating including the continuous phase including resole resin and reactive or non-reactive powder particles embedded or adhered to the continuous phase.

Description

[0001] Related application information [0002] This application claims the benefit of US Application 11 / 726,573, filed March 22, 2007, which is hereby incorporated by reference in its entirety. field of invention [0003] The present disclosure relates to coated particles and methods of making and using the same. In particular, the present disclosure relates to coated particles for use as proppants or for gravel packs and made by coating the particles with a liquid phenol-formaldehyde resole at ambient temperature, coating the powder, such as wire Novolak powder or resole powder is applied to the coated particles and mixed at low temperature until dry. The particles can be used in coated sand applications in the foundry industry if desired. Background technique [0004] The term "proppant" refers to a particulate material that is injected into fractures in the formation around oil, gas, water, and other similar boreholes to provide support to keep (proppant) these fractu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/16C09D7/62
CPCC08K9/08C09K8/805C09D7/1225C09D5/03C09D7/62Y10T428/2998
Inventor A·L·麦克拉里M·A·巴拉加斯R·R·麦克丹尼尔
Owner HEXION INC
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