Oriented pyramid inserts

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 10/08 (2006.01) E21B 10/16 (2006.01) E21B 10/52 (2006.01)

Patent

CA 2708651

An earth boring drill bit comprising cones, each cone having rows of inserts, where the inserts are in the form of a pyramid with four sides The insert includes ridges at the juncture of each adjacent side The ridges extend to the top of the insert and meet at a crest Oppositely disposed ridges on the insert lie substantially in the same plane, thereby forming two planes intersecting on the crest. The two planes are substantially perpendicular. The inserts are arranged on the cone such that one plane is substantially parallel with the insert row, and the other is substantially parallel with the cone axis.

Un trépan de forage comprend des cônes, chaque cône présentant des rangées d'inserts, les inserts ayant la forme d'une pyramide à quatre côtés. L'insert comprend des arêtes à la jonction de chaque côté adjacent. Les arêtes s'étendent jusqu'en haut de l'insert et se rejoignent au niveau d'une crête. Des arêtes disposées à l'opposé les unes des autres sur l'insert se trouvent sensiblement sur le même plan, formant ainsi deux plans qui se coupent sur la crête. Les deux plans sont sensiblement perpendiculaires. Les inserts sont disposés de telle sorte sur le cône que l'un des plans est sensiblement parallèle à la rangée d'inserts tandis que l'autre plan est sensiblement parallèle à l'axe du cône.

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