Apply torque in string when jarring down ?

02 October 2014 I am currently updating at Stuck Pipe Manual.

I have noticed that most manuals says: "Apply torque to string when jarring down. Do not apply torque when jarring up.

Anybody can come up with an explanation when to apply torque when jaaring down and not up.

Current surgestions are;

Due to stabilizer will pull BHA down with torque, good when jarring down and bad when jarring up.

Due to it will help (rotate) freeing the string from the wall.

Thanks,

Soren

5 Answer(s)

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