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This invention describes a way to stop fluid loss in oil and gas wells using special polymer elements. These elements are designed to be initially stiff to plug a hole, then become softer to allow a sealing material to be placed inside them. The method specifically relies on the polymer changing its stiffness in response to how quickly it's being deformed, with a substantially constant strain rate for the softening phase.
Why it matters: Filed before advanced polymer engineering and computational materials design could readily create materials with such tunable, strain-rate-dependent stiffness. This makes the specific polymer behavior described more feasible to achieve now.
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