As part of an offshore plug and abandonment operation, we installed a 7-5/8 inches plug at the bottom of a directional well. The plug provider requested 35 turns for setting the slips and 25 for releasing the stinger, but we had to apply 8 additional turns to get the requested ones on the bottom.
The reason for this was that the wellbore tortuosity, pipe specifications such as weight, grade, material, and mud density played a role in our work-string performance for this specific type of operation.
This engineering principle also helped us to rock the pipe when there was no weight available for sliding and setting completion packers in extended reach wells, among others.
Credit goes to Maximiliano Juan, MSc.
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Environment Health and Safety. Engineer.
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