Apparatus and Methods for Corrosion Protection of Downhole Tools
AssigneeBaker Hughes Incorporated
InventorsTu Tien Trinh, Eric Sullivan
Life of this patent
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Abstract
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.
Claims21
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;
- and
- 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.
A method for providing a drill bit, comprising:
- providing a bit body that is susceptible to corrosion when the drill bit is in a wellbore;
- providing an anode at a selected location on the bit body;
- providing a cathode associated with the bit body;
- and
- supplying electrical power to the anode when the tool is in the wellbore to complete an electrical circuit between the anode and the cathode, thereby arresting corrosion of the bit body when the drill bit is in the wellbore.
A drill bit, comprising;
- an anode placed at a selected location on the drill bit;
- a cathode associated with the drill bit;
- and
- 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.
A drill bit comprising:
- a bit body comprising a first material;
- a second material attached to a selected region of the bit body, the second material having a negative electrochemical potential relative to the first material, wherein the second material on the selected region is configured to dissolve when the drill bit is in a wellbore to protect the bit body from corrosion.
A method of providing a drill bit, comprising:
- providing bit body made of a first material;
- and
- attaching a second material at a selected region of the bit body, the second material having a negative electrochemical potential relative to the first material, wherein the second material on the selected region is configured to dissolve when the drill bit is in a wellbore to protect the bit body from corrosion.
A tool for use in a wellbore, comprising:
- a tool body;
- an anode placed at a selected location on the tool body;
- a cathode associated with the tool body;
- and
- a power source coupled to the anode for supplying electrical power to the anode, wherein supply of the power to the anode arrests corrosion of the tool body when the tool is in the wellbore.
Dependencies are inferred from the claim text.