Drill bit with a fixed cutting structure
AssigneeHalliburton Energy Services, Inc.
InventorsNuno Da Silva, Nicolas Luyckx
Life of this patent
Estimating the term…
Abstract
The invention concerns a drill bit (1) with stationary cutting structure, comprising a tool body (2) and several blades (3), which consist of a metal matrix impregnated with abrasive particles, and which are fixed to the tool body while extending forward therefrom, said blades (3) forming jointly a front cutting surface (7), and having radial channels (4) for drilling fluid which mutually separate the blades (3) and are open outwards. The invention is characterized in that it further comprises, through at least one radial fluid channel (2) arranged between two said blades (3), at least one bridge (6, 6′, 6″) which connects said two blades, by being arranged between the tool body (2) and said front cutting surface (7).
Claims19
A drill bit (1) with a fixed cutting structure, comprising:
- a tool body (2) including a central conduit for a drilling fluid;
- several blades (3), which include a metal matrix impregnated with abrasive particles and which are fixed to the tool body while extending forwards from the tool body;
- the blades (3) forming conjointly a front cutting face (7), and having radial passages (4) for a drilling fluid that mutually separate the blades (3) and are open towards the outside of the tool body wherein the radial passages each have a bottom connected to the central conduit to allow the drilling fluid to emerge from the bottoms of the radial passages;
- and
- several bridges (6, 6′, 6″) disposed inside at least one radial passage (4) for a fluid disposed between two aforementioned blades (3), wherein said bridge connects these two blades, while being disposed between the tool body (2) and the-front cutting face (7).
A drill bit (1) with a fixed cutting structure;
- comprising:
- a tool body (2) including a central conduit for a drilling fluid;
- several blades (3), which include a metal matrix impregnated with abrasive particles and which are fixed to the tool body while extending forwards from the tool body;
- the blades (3) forming conjointly a front cutting face (7), and having several radial passages (4) for a drilling fluid that mutually separate the blades (3) and are open towards the outside of the tool body wherein the radial passages each have a bottom connected to the central conduit to allow the drilling fluid to emerge from the bottoms of the radial passages and;
- several bridges (6, 6′, 6″) each disposed inside at least one of several radial passage (4) for a fluid disposed between two aforementioned blades (3), wherein each bridge connects these two blades, while being arranged between the tool body (2) and said front cutting face (7);
- wherein each radial passage contains at least one bridge.
Dependencies are inferred from the claim text.