The Innovative Design of Deep In Situ Pressure Retained Coring Based on Magnetic Field Trigger Controller

Figure 8

Magnetic circuit design scheme when the valve seat consists of four identical shape tile magnets. (a) Scheme 4. (b) Scheme 5. (c) Scheme 6. (d) Scheme 7. (e) Scheme 8. (f) Scheme 9.

(a)

(b)

(c)

(d)

(e)

(f)