Hardfacing rock bit cones for erosion protection

Details Hardfacing rock bit cones for erosion protection Hardfacing rock bit cones for erosion protection

Category

E - Fixed Constructions

Subcategory

21

Subsubcategory

B

IPC codes

E21B 10/46 (2006.01) B23P 15/28 (2006.01) E21B 10/08 (2006.01)

Type

Patent

Patent number

CA 2260176

Description

A method of manufacturing a rolling cone with hard-facing coating for use in drilling boreholes is disclosed. The method includes a step of depositing a layer of hardfacing material by an arc process, e.g., a gas-shielding tungsten arc welding process, a plasma-transferred arc welding process, or a metal inert gas arc welding process, over areas susceptible to erosion on the rolling cone surface. A rolling cone rock bit for drilling boreholes with a layer of hardfacing material deposited by an arc process either on the lands or in grooves or both of the cone surface is provided. Furthermore, a cone for attachment to the bit body of a rock bit with a layer of hardfacing material deposited on selected lands or in selected grooves or both of the cone surface also is provided.

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