Backing-off procedure with top drive

Backing-off procedure with top drive A. Backing off stuck pipe - Preliminary remarks:

a. The neutral weight is calculated as the weight in air of the string above the stuck point.

b. In order to avoid unintentional b/o (back-off), the maximum M/U torque should be applied before turning to the left.

c. Determine maximum overpull to be applied to the string. Beware of tapered strings!

d. Determine maximum torque which can be applied to the string under tension (Dril. Eng. Notebook, section C). The b/o torque will be the . . .

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