Glass forming hardbanding material
AssigneeThe NanoSteel Company, Inc.
InventorsDaniel James Branagan, Brian E. Meacham, William D. Kiilunen, James N. Milloway, Brian D. Merkle
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Abstract
A drill pipe and a method of applying hardbanding thereto. A hardbanding alloy comprising iron and manganese present in the range of 67 to 87 weight percent (wt. %), niobium and chromium present in the range of 9 to 29 wt. %, and boron, carbon and silicon present in the range of 3 to 6.5 wt. % may be welded around at least a portion of a tool joint circumference. The hardbanding alloy may exhibit a hardness of 45 Rc to 70 Rc and a wear rate in the range of 0.08 grams to 1.60 grams of mass loss after 6,000 cycles as measured using ASTM G65-04, Procedure A.
Claims17
A method of applying a hardband to a drill pipe containing a tool joint circumference, comprising:
- welding around at least a portion of said tool joint circumference a hardbanding alloy comprising iron and manganese present in the range of 67 to 87 weight percent (wt. %), niobium and chromium present in the range of 9 to 29, and boron, carbon and silicon present in the range of 3 to 6.5 wt. %;
- and
- cooling said hardbanding alloy, wherein said hardbanding alloy as welded exhibits a hardness of 45 Rc to 70 Rc and a wear rate in the range of 0.08 grams to 1.60 grams of mass loss after 6,000 cycles as measured using ASTM G65-04, Procedure A;
- wherein said hardbanding alloy further comprises:
- iron present in the range of 67.0 to 86.0 wt. %;
- manganese present in the range of 0.05 to 0.3 wt. %;
- niobium present in the range of 3.5 to 6.0 wt. %;
- chromium present in the range of 6.0 to 23.0 wt. %;
- boron present in the range of 2.5 to 4.5 wt. %;
- carbon present in the range of 0.5 to 2 wt. %;
- and
- silicon present in the range of 0.2 to 0.5 wt. % wherein said alloy contains up to 2.0 wt. % of an elemental impurity.
A drill pipe, comprising:
- a tool joint having a circumference;
- and
- a hardband disposed around at least a portion of said tool joint circumference, wherein said hardband includes a hardbanding alloy comprising iron and manganese present in the range of 67 to 87 weight percent (wt. %), niobium and chromium present in the range of 9 to 29 wt. %, and boron, carbon and silicon present in the range of 3 to 6.5 wt. %, wherein said hardbanding alloy exhibits a hardness of 45 Rc to 70 Rc and a wear rate in the range of 0.08 grams to 1.60 grams of mass loss after 6,000 cycles as measured using ASTM G65-04, Procedure A;
- wherein said hardbanding alloy further comprises:
- iron present in the range of 67.0 to 86.0 wt. %;
- manganese present in the range of 0.05 to 0.3 wt. %;
- niobium present in the range of 3.5 to 6.0 wt. %;
- chromium present in the range of 6.0 to 23.0 wt. %;
- boron present in the range of 2.5 to 4.5 wt. %;
- carbon present in the range of 0.5 to 2 wt. %;
- and
- silicon present in the range of 0.2 to 0.5 wt. % wherein said alloy contains up to 2.0 wt. % of an elemental impurity.
Dependencies are inferred from the claim text.