Example: Use the following data and determine the reduction in bottom-hole pressure if the riser is disconnected:
Step 1 Determine bottomhole pressure:
Step 2 Determine bottomhole pressure with riser disconnected:
BHP = (0.445 x 700) + [9.0 x 0.052 x (2020 — 700 — 75)] BHP = 311.5 + 582.7 BHP = 894.2 psi
Step 3 Determine bottomhole pressure reduction:
BHP reduction = 945.4 psi — 894.2 psi BHP reduction = 51.2 psi
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Co-op Mailing means that two or more businesses share in the cost and distribution of a direct mail campaign. It's kind of like having you and another non-competing business split the cost of printing, assembling and mailing an advertising flyer to a shared same market base.