Electrodrilling technology can be considered a commercial drilling method similar to the worldwide use of rotary and HDHMs technology. Electrodrilling combines some of the advantages of both rotary and HDHM methods, including:

• a large range of drillbit rotation speed

• independence of energy transmitted to the drillbit from the fluid flow

• use of different borehole cleaning agents

• controlled drilling of deviated and horizontal boreholes

An electrodrilling system is effectively applied in complicated geological conditions and old reservoirs where weighted mud or different mud mixtures must be used.

The application of electrodrills is very promising in directional, horizontal, multilateral, and research boreholes.

EDM for CTD is one of the best opportunities to overcome the current CTD problems. That is the area where all the disadvantages of EDM with standard single joint pipe vanish. On the other hand, the best cable electrodrilling ideas could be realized in CTD, so we could now be back on the right path.