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Trapped Annular Pressure

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A New Approach<br />

• Cooperative research between Chevron and Los Alamos<br />

National Lab led to the development of a shrinking<br />

spacer based on methyl methacrylate (MMA)<br />

• MMA is a liquid monomer that polymerizes to form many<br />

familiar items like plastic windows and acrylic<br />

paperweights, and is the active ingredient in many latex<br />

paints<br />

• MMA shrinks 20% as it changes from emulsified liquid<br />

MMA droplets to tiny solid poly-MMA particles

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