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<strong>Trapped</strong> <strong>Annular</strong> <strong>Pressure</strong><br />
Shrinking Spacer (TAPSS) Formulation<br />
• MMA is emulsified into a standard water-based spacer at<br />
10–50%<br />
•Water<br />
•Biopolymer (for viscosity)<br />
•Barite (1 st test – 12 ppg)<br />
•Emulsifiers<br />
•MMA (1 st test - 28%)<br />
•Defoamer<br />
•Inhibitor<br />
•Initiator (added as spacer is pumped)<br />
•Bicarb & caustic<br />
•Dispersant
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