Apparatus and methods for corrosion protection of downhole tools

摘要

In one aspect, an apparatus for use in a wellbore is provided that in one embodiment includes a drill bit having a bit body that is susceptible to corrosion when the drill bit is utilized in wellbore, an anode placed at a selected location on the bit body, a cathode associated with the bit body and a power source configured to provide electrical power to the anode to complete an electrical circuit between the anode and the bit body, wherein the supply of the electrical power to the anode arrests corrosion of the bit body when the drill bit is in the wellbore.

主权项

1. An apparatus for use in a wellbore, comprising:
a drill bit; an anode placed at a selected location on drill bit; a cathode associated with the drill bit; a power source configured to provide electrical power to the anode to complete an electrical circuit between the anode and the cathode, wherein the supply of the electrical power to the anode arrests corrosion of the bit when the drill bit is in the wellbore; and a sensor configured to provide a measurement relating to the corrosion of the drill bit when the drill bit is in the wellbore, wherein the electrical power to the anode is adjusted according to the measurement relating to the corrosion of the drill bit.