Vertical Drilling / Earthing / Cathodic Protection

The vertical drilling system lets you drill automatically keeping the well path vertical. The fully rotating system gives you cost-efficient drilling while automatically and continuously maintaining a vertical wellbore, thus removing the potential for costly correction runs especially for earthing purposes.
The full- improves hole cleaning efficiency and wellbore quality. Also, there's reduced lost-in-hole potential and reduced mechanical and differential sticking.
"Cathodic protection" is a term used for certain measures taken to prevent or minimize electrolytic corrosion of metallic equipment and structures. Cathodic protection devices redirect current to flow from a "sacrificial" anode to the soils-water electrolyte, instead of from an anode area on a pipeline or other metallic structure to be protected. The protective anode's role is to corrode in place of the metallic object it is designed to protect,

as shown in Figure 5. The protected facility is made to be a permanent cathode by use of cathodic protection devices.