Maximum Expected Wellbore Shear Pressure (MEWSP)

The expected pressure for a given hole section, a specific shear pressure requirement, specific operating piston design, and material specification, to shear drill pipe or tubing at MASP (surface), MAWHP (subsea), or other pressure limiting value.

Source: API STD 53, Blowout Prevention Equipment Systems for Drilling Wells, Upstream Segment, Fourth Edition, November 2012. Global Standards


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