Improvement of electrode collar structure of lwd system

The electrode collar is the important structure of LWD system,which receive the current from the stratum.The electronic unit can calculate the stratum electrical resistivity by the current.At the present,the gap of electrode collar was filled with insulating material which felt the out ring with inner ring.The insulating material is not strong enough to resist the erode by stratum,even the electrode ring was destroyed by collision.So,the structure of the electrode ring needs to be improved as soon as possible.This paper discussed the researching about the structure improvement of electrode ring.