Also, it is described the influence of bit pressure and rotate speed on anti-deviation force of the BHA of anti-deviation and fast penetration with pre-bending dynamics.

Fourth, the brake system maintenance: always check the brake is not weak, deviation, brake pedal pedal force shi Bushi change, the pipeline necessary to sort through all the braking system and some.

But this calculation model in fact does not specify the force condition of the elastic bar, which leads to great deviation.