08991471 cites 10 patents.

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.

Title
Methods of forming earth-boring tools
Application Number
13/314960
Publication Number
8991471 (B2)
Application Date
December 8, 2011
Publication Date
March 31, 2015
Inventor
Tu Tien Trinh
Houston
TX, US
Eric C Sullivan
Houston
TX, US
Xiaomin Chris Cheng
Houston
TX, US
Agent
TraskBritt
Assignee
Baker Hughes Incorporated
TX, US
IPC
E21B 10/36
E21B 10/00
C22C 38/12
C22C 38/10
C21D 9/22
C21D 6/00
B22D 25/02
B22D 19/16
B22D 13/00
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