A recent project in the Asia-Pacific country of Brunei required the underbalanced deployment of sand control screens into two wells immediately following the completion of their underbalanced drilling. An inflatable system was specially developed for use in this application to overcome the challenge of maintaining well control while deploying the screens. After serving as a primary barrier while the screens were run into the well, the inflatable tool was then released by the run-in string, and pushed to bottom; a task that would pose a significant challenge to existing inflatable technology. The new system integrated specialized accessories with fieldproven inflatable tools and techniques to enable the innovative procedure.

The paper will summarize the system design process, showing how project engineers addressed the limitations of previous methods with new, inflatable accessories and running procedures. The authors will also present a detailed description of system components including running tools, inflatable tools, releasing tools and their operation. Finally, the paper will review the implementation of this new technology by summarizing the application from the pre-job planning process through the installation of the equipment at the well-site.

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