D Zivar - Sharif University of Technology, Tehran, Iran
S. Jamshidi - Sharif University of Technology, Tehran, Iran.

Controlling a well that goes out of control is one of the more important subject in the drilling industry. Snubbing operation is the advanced method that can be used in well control process. Snubbing define as a running pipes into the well that has pressure. Knowing the forces that can act on pipes and other snubbing unit element is useful to carry out a successful operation. This article discussed about forces act on drill pipes entered into the horizontal pressurized well using snubbing unit. It is tried in this study the effect of the curvature of well, considered with respect to the new prospect. Also force diagram versus depth for a real trajectory that is located in the Canada is present.

Snubbing Force, Bending Force, Well Control, Drilling