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2014 R&D 100 Winner
Hydraulic fracturing, or fracking, has become a key component of the U.S.’ energy resource strategy. A key to maximizing the effectiveness of fracking is to keep the proppants placed in the fracture from being returned back at high velocity when the well is turned around and the production cycle has begun. Historically, this hazardous situation has been addressed with resin-coated sand because of its ability to create a bonded structure within the propped fracture. However the problem of proppant flowback remains difficult to address in some applications.

A new type of resin-coated sand created by Preferred Sands and The Dow Chemical Company addresses this difficulty, providing measurable particle bond strength in the temperature range of 75 to 140 F without the aid of an external surfactant or activator. Preferred RCS Garnet 2.0 resin-coated sand delivers this performance with the help of a special polyurethane polymer bonding mechanism that utilizes Dow’s Teraforce technology. When Garnet leaves the production site it is essentially a fully reacted coating. This means that no further chemical change needs to occur to facilitate particle to particle bonding.

Technology
Resin-coated sand

Developers
The Dow Chemical Company
Preferred Sands


Development Team

The Preferred RCS Garnet 2.0 resin-coated sand Development Team
Kaoru Aou, Principal Developer, The Dow Chemical Company
Ralph Barthel, Principal Developer, Preferred Sands
Rajat Duggal, Principal Developer, The Dow Chemical Company
Will Koonce, Principal Developer, The Dow Chemical Company
Robert McDaniel, Principal Developer, Preferred Sands
Juan Carlos Medina, Principal Developer, The Dow Chemical Company
Spiros Monastiriotis, Principal Developer, Preferred Sands
Rajesh Paradkar, Principal Developer, The Dow Chemical Company

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