Self-Excited Codirectionally Magnetically Compensated Rotating Ranging Method

Figure 11

Field test data with curve fitting. (a) Rotating geomagnetic field. (b) One cycle of magnetization field curve at a certain measuring point. (c) Magnetization field curve of parallel drilling. (d) Magnetization field curve of nonparallel drilling. (e) The peak-to-peak value of parallel and nonparallel drilling trajectories.

(a)

(b)

(c)

(d)

(e)