EnBW Energie Baden-Wurttemberg has patented a method for unblocking geological deep wells. The process involves pumping liquid from one well, treating it, and then using it to introduce carboxylic acids into a second well to restore its fluid absorption capabilities. GlobalData’s report on EnBW Energie Baden-Wurttemberg gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on EnBW Energie Baden-Wurttemberg, DC-DC converters was a key innovation area identified from patents. EnBW Energie Baden-Wurttemberg's grant share as of July 2024 was 44%. Grant share is based on the ratio of number of grants to total number of patents.

Method for unblocking geological deep wells using carboxylic acids

Source: United States Patent and Trademark Office (USPTO). Credit: EnBW Energie Baden-Wurttemberg AG

The patent US12018208B2 outlines a method for unblocking deep wells that have become obstructed by adsorbents. The process involves several key steps: first, liquid is pumped out of a first deep well and treated before being pumped into a second deep well. If the second well is blocked, one or more carboxylic acids—such as monocarboxylic, dicarboxylic, or tricarboxylic acids—are introduced to facilitate the unblocking. Specific examples of carboxylic acids mentioned include ascorbic acid and citric acid. The method also allows for the displacement of brine from the deep well by the carboxylic acid, enhancing the effectiveness of the unblocking process.

Further details of the method include the insertion of a probe into the deep well to deliver the carboxylic acid to the desired depth, as well as the option to pressurize the acid in addition to the hydrostatic pressure present in the well. After the adsorbent is dissolved by the carboxylic acid, both the acid and the dissolved adsorbent can be pumped out of the well. The claims also specify that the introduction of the carboxylic acid can occur separately from the treated liquid, targeting either the bottom of the second deep well or the specific location where the adsorbent is causing a blockage. The patent highlights the use of lithium and manganese oxide type adsorbents, indicating a focus on specific materials that may require this unblocking method.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.