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US-12044075-B2 · Jul 23, 2024 · US
Methods of forming earth-boring tools
US8991471B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8991471-B2 |
| Application number | US-201113314960-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 8, 2011 |
| Priority date | Dec 8, 2011 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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Abstract
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A method of forming an earth-boring tool includes introducing metal into a die, rotating the die to generate centrifugal forces on the metal, and cooling the metal in the rotating die. A rotary drill bit may include a unitary, centrifugally cast bit body including an integral shank, at least one blade, and at least one cutting element on the blade. A rotary drill bit or a roller cone may include a first centrifugally cast material and a second centrifugally cast material. Another rotary drill bit includes a bit body comprising a maraging steel alloy. A method of forming a rotary drill bit may include disposing cutting elements on a rotary drill bit comprising maraging steel and aging the rotary drill bit to form at least one intermetallic precipitate phase. Methods of repairing a rotary drill bit include annealing and aging at least a portion of a rotary drill bit.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of forming an earth-boring tool, comprising: introducing a first metal into a die configured to define at least a portion of at least one cutting element of an earth-boring tool, the die comprising at least one sidewall and a closed end; rotating the die about an axis of rotation while the first metal is in a molten state within the die to generate centrifugal forces on the molten first metal and form a surface of the molten first metal over the a…
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Classifications
Chemistry & Metallurgy · mapped topic
Cross-Sectional Technologies · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- E21B10/55Primary
Fixed Constructions · mapped topic
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- What does patent US8991471B2 cover?
- A method of forming an earth-boring tool includes introducing metal into a die, rotating the die to generate centrifugal forces on the metal, and cooling the metal in the rotating die. A rotary drill bit may include a unitary, centrifugally cast bit body including an integral shank, at least one blade, and at least one cutting element on the blade. A rotary drill bit or a roller cone may includ…
- Who is the assignee on this patent?
- Cheng Xiaomin Chris, Sullivan Eric C, Trinh Tu Tien, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification E21B10/55. Mapped technology areas include Fixed Constructions.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).