Patent attributes
A method of performing an operation in a wellbore includes performing the operation in the wellbore from a rig; and, while performing the operation, repeatedly: inputting one or more predicted values from a model of the wellbore; inputting one or more measured parameters from one or more sensors of the rig; calculating a deviation of each measured parameter from a respective predicted value; applying a weighting factor to each calculated deviation to obtain a respective alert level; calculating a rate of change of each measured parameter from a parameter previously measured by the respective sensor; applying a weighting factor to each calculated rate of change to obtain a respective alert level; and adding the alert levels and dividing the sum thereof by a maximum alert level to obtain a stuck pipe risk.
