B - Operations – Transporting – 24 – D
Patent
B - Operations, Transporting
24
D
B24D 3/14 (2006.01) B22F 7/06 (2006.01) C22C 47/00 (2006.01) C22C 47/14 (2006.01) E21B 10/52 (2006.01) E21B 10/56 (2006.01)
Patent
CA 2212276
In one embodiment, composite constructions of the invention are in the form of a plurality of coated fibers bundled together to produce a fibrous composite construction in the form of a rod. Each fiber has a core formed from a hard phase material, that is surrounded by a shell formed from a binder phase material. In another embodiment of the invention, monolithic sheets of the hard phase material and the binder phase material are stacked and arranged to produce a swirled composite in the form of a rod. In still another embodiment of the invention, sheets formed from coated fibers are arranged to produce a swirled composite. Inserts for use in such drilling applications as roller cone rock bits and percussion hammer bits, and shear cutters for use in such drilling applications as drag bits, that are manufactured using conventional methods from these composite constructions exhibit increased fracture toughness due to the continuous binder phase around the hard phase of the composites. These binder phases increase the overall fracture toughness of the composite by blunting or deflecting the tip of a propagating crack.
Selon une variante, les composites objets de l'invention se présentent sous la forme d'une pluralité de fibres enduites groupées pour former une barre fibreuse composite. Chaque fibre comprend une âme dure entourée d'une coquille de matériau liant. Dans une autre variante, des feuilles monolithiques de matériau dur et de matériau liant sont empilées et disposées pour former un composite vrillé en forme de barre. Selon une autre variante encore, des feuilles formées à partir de fibres enduites sont disposées pour former un composite vrillé. Des outils rapportés faits de ces composites selon les techniques classiques de fabrication et servant dans des tricônes de forage dans le roc, des marteaux à percussion, des trépans à lames, etc., offrent une ténacité supérieure en raison de la présence d'une phase liante continue autour de l'âme dure des composites. Cette phase liante rehausse la ténacité du composite en émoussant ou en déviant la pointe d'une fissure en propagation.
Fang Zhigang
Rai Ghanshyam
Sue J. Albert
Oyen Wiggs Green & Mutala Llp
Smith International Inc.
LandOfFree
Composite constructions with oriented microstructure does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Composite constructions with oriented microstructure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composite constructions with oriented microstructure will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1710973