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硬质聚氨酯泡沫，最初由桑迪亚国家实验室（Sandia National Laboratories）作为电子元件的耐高温填料研制成功，现在可以用来防止在钻进时泥浆从井眼中漏失到周围岩层里。为了寻求这种方法，桑迪亚、合成塞（Poly Plug）公司、NL Baroid和地热联合会的科学家们正在联合试验这种泡沫和一种30英尺长的铝合金安置工具。该工具在孔内位于钻柱的末端。当将它放置到接近于预计的漏失带时，这里面分开填装的化学物质通过泥浆的循环压力压入混合室，在混合室里它们反应后生成泡沫，当它通过工具底部的出口排出时体积能膨胀7倍，然后泡沫进入裂隙中。
Rigid polyurethane foam, originally developed by Sandia National Laboratories as a refractory filler for electronic components, can now be used to prevent mud from leaking from the wellbore into the surrounding rock during drilling. To find ways to do this, scientists at Sandia, Poly Plug, NL Baroid and Geothermal Federation are experimenting with the foam and a 30-foot aluminum placement tool. The tool is located in the hole at the end of the drill string. When placed close to the expected loss zone, the separately filled chemicals are forced into the mixing chamber by the circulation pressure of the slurry, where they react to create a foam which, as it exits through the outlet at the bottom of the tool The volume can swell seven times, then the foam enters the crack.