SYNERGISTIC VISCOSIFIERS FOR CLAY-FREE, WATER-BASED DRILLING FLUIDS
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Mar 27, 2025
app pub date -
Sep 25, 2023
filing date -
Sep 25, 2023
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A water-based drilling fluid can include a first and second viscosifier of a cross-linked starch and a cross-linked acrylamide-based polymer. The acrylamide-based polymer can be crosslinked and optionally include hydrophobic monomers. The viscosifiers create a synergistic effect that imparts desirable properties to the drilling fluid compared to using either of the viscosifiers alone. The viscosifiers can be used as an alternative to other types of viscosifiers such as xanthan gum.
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