Hard surfaced well tool and method of making same

Details Hard surfaced well tool and method of making same Hard surfaced well tool and method of making same

E - Fixed Constructions

21

B

117/157, 255/28

E21B 17/08 (2006.01) B22F 7/08 (2006.01) E21B 17/10 (2006.01) F16C 29/00 (2006.01) F16L 57/06 (2006.01) E21B 17/042 (2006.01)

Patent

CA 1043325

ABSTRACT OF THE DISCLOSURE A wear resistant tubular well tool, such as a tool joint, comprises a hollow cylindrical body having d hard metal, such as a coarse-grained sintered tungsten carbide, deposited on a portion of the exterior of the body and a fine-grained hard metal, such as a cast t ngsten carbide, deposit covering substantially all of the external surface of said coarse- grained hard metal deposit. The method of making the well tool comprises depositing the coarse-grained hard metal by welding and then casting or fusing the fine-grained hard metal over the coarse-grained hard metal layer.

272062

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