Aluminide coated bearing elements for roller cutter drill bits

Details Aluminide coated bearing elements for roller cutter drill bits Aluminide coated bearing elements for roller cutter drill bits

E - Fixed Constructions

21

B

E21B 10/22 (2006.01) F16C 17/04 (2006.01) F16C 33/12 (2006.01)

Patent

CA 2067845

ABSTRACT A roller cutter drill bit (10) has separate bearing elements (82, 84, 86) positioned between a journal (20) and a roller cutter (60) mounted for rotation on the journal (20). The bearing elements (82, 84, 86) are formed of a superalloy material and the bearing surfaces of the bearing elements (82, 84, 86) have an aluminide coating applied thereon to form a bearing surface stable at operating temperatures over 500 F and as high as 1000 F.

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