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Drill bit with stationary cutting structure

A cutting structure, drill bit technology, applied in drill bits, earthwork drilling, drilling equipment, etc., can solve problems such as existing limitations and increasing metal fragmentation

Inactive Publication Date: 2008-02-20
HALLIBURTON ENERGY SERVICES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the given configuration of the tool there is a limit on blade height beyond which there is an increased risk of metal splintering

Method used

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  • Drill bit with stationary cutting structure
  • Drill bit with stationary cutting structure
  • Drill bit with stationary cutting structure

Examples

Experimental program
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Embodiment Construction

[0044] [44] An example given in a non-limiting manner has been shown on the drawing. The drill bit 1 includes a tool body 2 and a plurality of blade bodies 3, and the blade bodies are composed of a metal matrix mixed with wear-resistant particles, such as diamonds. The blade body 3 is fixed to the tool body in a usual manner, so it is particularly shown in FIG. 2 that the blade body starts from the tool body 2 and extends forward at a relatively high height. Therefore, a front cutting surface 7 is formed on one of its free ends. Between the blade bodies 3, radial channels 4 for fluid are provided, which can separate the blade bodies 3 from each other and are open to the outside. The tool body has a central conduit 5 through which the drilling fluid leads to the bottom of the radial channel 4.

[0045] [45] As shown in Figure 1, six of the ten radial channels 4 of the drill bit are equipped with three bridges 6, 6', 6" passing through the channels, and the bridges are connected to ...

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PUM

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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).

Description

Technical field [0001] [01] The present invention relates to a drill with a fixed cutting structure, which includes [0002] [02]-a tool body, and [0003] [03]-a plurality of blade bodies (lame), the blade body is composed of a metal matrix (matrice métallique) mixed with wear-resistant particles (particulesabrasives), and the blade body extends forward from the tool body It is fixed on the tool body in a way that the multiple blade bodies together constitute a front cutting surface, and have radial channels for drilling fluid, and the channels can separate the blade bodies from each other and open outward ( See US-B-6,725,953). Background technique [0004] [04] Two types of tools are used in oil drilling: one is a molette type drill bit, and the other is a fixed cutter type drill bit. [0005] [05] The rotary drill bit is an assembly that includes some movable components, while the fixed cutter bit is a single holder without any movable components. [0006] [06] In the categor...

Claims

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Application Information

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IPC IPC(8): E21B10/60
CPCE21B10/602
Inventor N·达席尔瓦N·卢伊克斯
Owner HALLIBURTON ENERGY SERVICES INC