Xanthan gum is often used to seal lost circulation in drilling wells, especially when the permeability of the well through the formation is high, where lost circulation is more common. 

At this time, xanthan gum can form an effective water barrier by filling leaks such as the bottom of the well, the well wall, and formation cracks, thereby reducing or containing the penetration of incoming and out-of-well fluids and improving the sealing performance of the wellbore.

penetration of incoming and out-of-well fluids and improving the sealing performance of the wellbore.

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