Halliburton Energy Services, Inc.

Nicolas Luyckx

Nuno Da Silva

Valérie Sillen

A matrix drill bit and method of manufacturing a matrix bit having back raked cutting elements is disclosed. In one aspect, a matrix drill bit for well drilling includes a matrix bit body that has a front area in a direction of drilling and two or more diamond impregnated cutting blades protruding from the front area of the matrix bit body. The cutting blades each have a front external surface protruding from the front area of the matrix bit body and present a plurality of back raked downhole interface surfaces in the direction of drilling. The downhole interface surfaces span a leading face and a trailing face where the leading face extends to a first height and the trailing face extends to a second height and the first height is greater than the second height.

Matrix drill bits with back raked cutting elements

The invention concerns a drill bit () with stationary cutting structure, comprising a tool body () and several blades (), which consist of a metal matrix impregnated with abrasive particles, and which are fixed to the tool body while extending forward therefrom, said blades () forming jointly a front cutting surface (), and having radial channels () for drilling fluid which mutually separate the blades () and are open outwards. The invention is characterized in that it further comprises, through at least one radial fluid channel () arranged between two said blades (), at least one bridge (&#x2033;) which connects said two blades, by being arranged between the tool body () and said front cutting surface ().

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Mons, Belgium

Nicolas Luyckx