Preventing Proppant Flowback

Organization: The Dow Chemical Comapny, Preferred Sands
Co-Developer(s): 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, Princi
Year: 2014

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

DevelopersThe Dow Chemical CompanyPreferred Sands

Development Team

The Preferred RCS Garnet 2.0 resin-coated sand Development Team Kaoru Aou, Principal Developer, The Dow Chemical CompanyRalph Barthel, Principal Developer, Preferred SandsRajat Duggal, Principal Developer, The Dow Chemical CompanyWill Koonce, Principal Developer, The Dow Chemical CompanyRobert McDaniel, Principal Developer, Preferred SandsJuan Carlos Medina, Principal Developer, The Dow Chemical CompanySpiros Monastiriotis, Principal Developer, Preferred SandsRajesh Paradkar, Principal Developer, The Dow Chemical Company

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