Anti-balling coating on drill bits and downhole tools
View Patent ↗A coating that includes a polyisocyanate compound and at least one metal inclusion selected from the group consisting of tungsten and tungsten carbide. The metal inclusions range between about five percent by weight to about fifty percent by weight. A downhole tool that includes a body, a shank positioned at one end of the body, at least one cutter coupled to the body, and a coating coupled to at least a portion of one or more of the body or the shank. The coating includes a polyisocyanate compound and at least one metal inclusion selected from the group consisting of tungsten, tungsten carbide, and aluminum. The metal inclusions range between about five percent by weight to about fifty percent by weight. An intermediate coating is optionally disposed between at least a portion of the coating and at least one of the body or the shank.
1. A coating on downhole tools, comprising:
a downhole tool;
a coating on at least a portion of said downhole tool, said coating comprising;
a polyisocyanate compound; and
at least one metal inclusion selected from the group consisting of tungsten and tungsten carbide,
wherein the metal inclusions range between about five percent by weight of said coating on said at least the portion of said downhole tool to about fifty percent by weight of said coating on said at least the portion of said downhole tool.
2. The coating of claim 1 , wherein the at least one metal inclusion comprises tungsten ranging between about five percent by weight of said coating on said at least the portion of said downhole tool to about fifty percent by weight of said coating on said at least the portion of said downhole tool.
3. The coating of claim 2 , wherein the tungsten ranges between about five percent by weight of said coating on said at least the portion of said downhole tool to about ten percent by weight of said coating on said at least the portion of said downhole tool.
4. The coating of claim 2 , wherein the tungsten ranges between about ten percent by weight of said coating on said at least the portion of said downhole tool to about twenty percent by weight of said coating on said at least the portion of said downhole tool.
5. The coating of claim 2 , wherein the tungsten ranges between about twenty percent by weight of said coating on said at least the portion of said downhole tool to about thirty percent by weight of said coating on said at least the portion of said downhole tool.
6. The coating of claim 2 , wherein the tungsten ranges between about thirty percent by weight of said coating on said at least the portion of said downhole tool to about forty percent by weight of said coating on said at least the portion of said downhole tool.
7. The coating of claim 2 , wherein the tungsten ranges between about forty percent by weight of said coating on said at least the portion of said downhole tool to about fifty percent by weight of said coating on said at least the portion of said downhole tool.
8. The coating of claim 1 , wherein the at least one metal inclusion comprises tungsten carbide ranging between about five percent by weight of said coating on said at least the portion of said downhole tool to about fifty percent by weight of said coating on said at least the portion of said downhole tool.
9. The coating of claim 8 , wherein the tungsten carbide ranges between about five percent by weight of said coating on said at least the portion of said downhole tool to about ten percent by weight of said coating on said at least the portion of said downhole tool.
10. The coating of claim 8 , wherein the tungsten carbide ranges between about ten percent by weight of said coating on said at least the portion of said downhole tool to about twenty percent by weight of said coating on said at least the portion of said downhole tool.
11. The coating of claim 8 , wherein the tungsten carbide ranges between about twenty percent by weight of said coating on said at least the portion of said downhole tool to about thirty percent by weight of said coating on said at least the portion of said downhole tool.
12. The coating of claim 8 , wherein the tungsten carbide ranges between about thirty percent by weight of said coating on said at least the portion of said downhole tool to about forty percent by weight of said coating on said at least the portion of said downhole tool.
13. The coating of claim 8 , wherein the tungsten carbide ranges between about forty percent by weight of said coating on said at least the portion of said downhole tool to about fifty percent by weight of said coating on said at least the portion of said downhole tool.
14. The coating of claim 1 , wherein the at least one metal inclusion further comprises aluminum.
15. The coating of claim 1 , wherein the at least one metal inclusion comprises tungsten and tungsten carbide, the tungsten and tungsten carbide collectively ranging between about five percent by weight of said coating on said at least the portion of said downhole tool to about fifty percent by weight of said coating on said at least the portion of said downhole tool.
16. A downhole tool, comprising:
a body;
a shank positioned at one end of the body;
at least one cutter coupled to the body; and
a coating coupled to at least a portion of one or more of the body or the shank, the coating comprising:
a polyisocyanate compound; and
at least one metal inclusion selected from the group consisting of tungsten, tungsten carbide, and aluminum,
wherein the metal inclusions range between about five percent by weight of said coating coupled to said at least the portion of the body or the shank to about fifty percent by weight of said coating coupled to said at least the portion of the body or the shank.
17. The downhole tool of claim 16 , wherein the at least one metal inclusion comprises tungsten ranging between about five percent by weight of said coating coupled to said at least the portion of the body or the shank to about fifty percent by weight of said coating coupled to said at least the portion of the body or the shank.
18. The downhole tool of claim 16 , wherein the at least one metal inclusion comprises tungsten carbide ranging between about five percent by weight of said coating coupled to said at least the portion of the body or the shank to about fifty percent by weight of said coating coupled to said at least the portion of the body or the shank.
19. The downhole tool of claim 16 , wherein the at least one metal inclusion comprises aluminum ranging between about five percent by weight of said coating coupled to said at least the portion of the body or the shank to about fifty percent by weight of said coating coupled to said at least the portion of the body or the shank.
20. The downhole tool of claim 16 , wherein the at least one metal inclusion comprises tungsten and tungsten carbide, the tungsten and tungsten carbide collectively ranging between about five percent by weight of said coating coupled to said at least the portion of the body or the shank to about fifty percent by weight of said coating coupled to said at least the portion of the body or the shank.
21. The downhole tool of claim 16 , wherein the at least one metal inclusion comprises tungsten and aluminum, the tungsten and aluminum collectively ranging between about five percent by weight of said coating coupled to said at least the portion of the body or the shank to about fifty percent by weight of said coating coupled to said at least the portion of the body or the shank.
22. The downhole tool of claim 16 , wherein the at least one metal inclusion comprises tungsten carbide and aluminum, the tungsten carbide and aluminum collectively ranging between about five percent by weight of said coating coupled to said at least the portion of the body or the shank to about fifty percent by weight of said coating coupled to said at least the portion of the body or the shank.
23. The downhole tool of claim 16 , wherein the at least one metal inclusion comprises tungsten, tungsten carbide, and aluminum, the tungsten, tungsten carbide and aluminum collectively ranging between about five percent by weight of said coating coupled to said at least the portion of the body or the shank to about fifty percent by weight of said coating coupled to said at least the portion of the body or the shank.
24. The downhole tool of claim 16 , wherein the body is fabricated from steel or an infiltrated matrix.
25. A downhole tool, comprising:
a body;
a shank positioned at one end of the body;
at least one cutter coupled to the body;
an intermediate coating coupled to at least a portion of one or more of the body or the shank; and
a coating coupled to at least a portion of the intermediate coating, the coating comprising:
a polyisocyanate compound; and
at least one metal inclusion selected from the group consisting of tungsten, tungsten carbide, and aluminum,
wherein the metal inclusions range between about five percent by weight of said coating coupled to said at least the portion of the intermediate coating to about fifty percent by weight of said coating coupled to said at least the portion of the intermediate coating.
26. The downhole tool of claim 25 , wherein the at least one metal inclusion comprises tungsten ranging between about five percent by weight of said coating coupled to said at least the portion of the intermediate coating to about fifty percent by weight of said coating coupled to said at least the portion of the intermediate coating.
27. The downhole tool of claim 25 , wherein the at least one metal inclusion comprises tungsten carbide ranging between about five percent by weight of said coating coupled to said at least the portion of the intermediate coating to about fifty percent by weight of said coating coupled to said at least the portion of the intermediate coating.
28. The downhole tool of claim 25 , wherein the at least one metal inclusion comprises aluminum ranging between about five percent by weight of said coating coupled to said at least the portion of the intermediate coating to about fifty percent by weight of said coating coupled to said at least the portion of the intermediate coating.
29. The downhole tool of claim 25 , wherein the at least one metal inclusion comprises tungsten and tungsten carbide, the tungsten and tungsten carbide collectively ranging between about five percent by weight of said coating coupled to said at least the portion of the intermediate coating to about fifty percent by weight of said coating coupled to said at least the portion of the intermediate coating.
30. The downhole tool of claim 25 , wherein the at least one metal inclusion comprises tungsten and aluminum, the tungsten and aluminum collectively ranging between about five percent by weight of said coating coupled to said at least the portion of the intermediate coating to about fifty percent by weight of said coating coupled to said at least the portion of the intermediate coating.
31. The downhole tool of claim 25 , wherein the at least one metal inclusion comprises tungsten carbide and aluminum, the tungsten carbide and aluminum collectively ranging between about five percent by weight of said coating coupled to said at least the portion of the intermediate coating to about fifty percent by weight of said coating coupled to said at least the portion of the intermediate coating.
32. The downhole tool of claim 25 , wherein the at least one metal inclusion comprises tungsten, tungsten carbide, and aluminum, the tungsten, tungsten carbide and aluminum collectively ranging between about five percent by weight of said coating coupled to said at least the portion of the intermediate coating to about fifty percent by weight of said coating coupled to said at least the portion of the intermediate coating.