How to Schedule BOP Tests Around Drill Floor Fatigue Troughs

A 14-day BOP test kicks off at 03:20 on day 18 of a hitch because the weather window closed and the well schedule demanded it. The test runs clean. Two shifts later, a dropped-object near-miss links back to the same derrick crew who worked the pressure test overnight. The test was on time. The crew behind it was not.

A deepwater semi-sub started its 14-day blowout preventer pressure test at 03:20 on day 18 of a 21-day rotation. The test had been deferred 48 hours for weather, and the drilling plan needed the next hole section to start before crew-change. The BOP cycled cleanly through low-pressure and high-pressure sequences on each component. Two tours later, a sheave liner fell from the derrick's racking board and missed a roustabout by roughly two meters.