Controlling the rate of angle increase is imperative if fatigue to drill pipe and drill collars is to be avoided. This can be accomplished with the angle building drilling assembly in one of several ways:
1. Reducing the O.D. of the stabilizer blades or cutters.
2. Changing the fulcrum point of the stabilizer.
3. Placing the stabilizer closer together in the drilling assembly.
4. Increasing the stiffness of the drill collars.
5. Changing bit weight, rotary speed and pump pressure.

Type of stabilizers depend upon the formation in which they are to be used,

Stabilizers are bearings placed on a drilling shaft (drill collars) and in general practice, the placing of bearings (stabilizers) closer together on a shaft (drill collar) stiffens the shaft. Therefore, by carefully controlling the span between the stabilizers, the directional driller can control the rate of deflection angle movement reasonably well.