Crosslinked acids comprising derivatized xanthan and...

Wells – Processes – Placing fluid into the formation

Reexamination Certificate

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C166S305100, C166S308500, C166S310000

Reexamination Certificate

active

07735558

ABSTRACT:
Many methods are provided herein including, in one embodiment, a method comprising: providing a fluid that comprises an acid, crosslinked oxidized xanthan, and optionally, a base fluid; placing the fluid in a well bore penetrating a subterranean formation; and allowing the fluid to acidize at least a portion of the formation or damage contained therein. In another embodiment, herein provided is a fluid for subterranean uses comprising an acid and crosslinked, oxidized xanthan.

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