B - Operations – Transporting – 22 – F
Patent
B - Operations, Transporting
22
F
B22F 3/12 (2006.01) C22C 29/00 (2006.01) E21B 10/00 (2006.01)
Patent
CA 2630914
Methods of forming bit bodies for earth-boring bits include assembling green components, brown components, or fully sintered components, and sintering the assembled components. Other methods include isostatically pressing a powder to form a green body substantially composed of a particle-matrix composite material, and sintering the green body to provide a bit body having a desired final density. Methods of forming earth-boring bits include providing a bit body (52) substantially formed of a particle-matrix composite material and attaching a shank to the body. The body is provided by pressing a powder to form a green body and sintering the green body. Earth-boring bits include a unitary structure substantially formed of a particle-matrix composite material . The unitary structure includes a first region configured to carry cutters and a second region that includes a threaded pin. Earth-boring bits include a shank attached directly to a body substantially formed of a particle-matrix composite material.
La présente invention concerne des procédés de formation de corps pour des trépans de forage de terrain consistant à assembler des composants crus, des composants bruns ou des composants totalement frittés, et à fritter les composants assemblés. D~autres procédés consistent à exercer une compression isostatique sur une poudre pour former une ébauche crue sensiblement composée d~un matériau composite à matrice de particules, et à fritter l~ébauche crue pour obtenir un corps de trépan doté d~une densité finale voulue. Des procédés destinés à produire des trépans de forage consistent à constituer un corps de trépan sensiblement formé d~un matériau composite à matrice de particules et à fixer une tige au corps. Le corps est obtenu par compression d~une poudre pour former une ébauche crue et par frittage de celle-ci. Des trépans de forage comportent une structure unitaire sensiblement formée d~un matériau composite à matrice de particules. La structure unitaire comprend une première partie conçue pour porter des taillants et une seconde partie comportant une tige filetée. Des trépans de forage comportent une tige fixée directement à un corps sensiblement formé d~un matériau composite à matrice de particules.
Chrest Benjamin J.
Duggan James L.
Eason Jimmy W.
Gladney Jared D.
Lyons Nicholas J.
Baker Hughes Incorporated
Sim & Mcburney
LandOfFree
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