Guidelines for Rotary Directional Drilling
All rotary BHA’s have a tendency to build and directional control is maintained by selecting a BHA which gives the desired build up rate (BUR).
Due to the strong build tendency, it is preferable to err on the low side of vertical section as it is it will always be simpler to make a build correction than a drop correction. The maximum desired BUR is 2.1/2 to 3 degrees / 100 ft. The abrasive nature of the formation is such that stabiliser gauge can wear sufficiently during the course of . . .