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Drill with fixed cutting structure

A cutting structure and drill bit technology, applied in drill bits, earthwork drilling, drilling equipment, etc., can solve the problems of increasing metal fragmentation and limitations, and achieve the effect of increasing the number of diamonds and improving the service life

Inactive Publication Date: 2011-12-14
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 with fixed cutting structure
  • Drill with fixed cutting structure
  • Drill with fixed cutting structure

Examples

Experimental program
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Effect test

Embodiment Construction

[0044] An exemplary embodiment, given in a non-limitative manner, has been shown in the figures. The drill bit 1 comprises a tool body 2 and a plurality of cutting bodies 3 consisting of a metal matrix mixed with wear-resistant particles, such as diamonds. The blade body 3 is fixed on the tool main body in the usual way, therefore especially from figure 2 As shown above, the blade body extends forward from the tool body 2 at a relatively high height. A rake face 7 is thus formed at one of its free ends. Between said blade bodies 3 radial channels 4 for fluid are arranged, 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 channels 4 .

[0045] Such as figure 1 As shown, six of the ten radial passages 4 of the drill bit are provided with three bridges 6 , 6 ′, 6 ″ passing through the passages, each of which connects two adjacent cutting b...

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PUM

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Abstract

The invention relates to a drill bit (1) with a fixed cutting structure, comprising: a tool body (2); and a plurality of cutting bodies (3), said cutting bodies consisting of a metal matrix mixed with wear-resistant particles, and The blade body is fixed on the tool body in a manner extending forward from the tool body, the plurality of blade bodies (3) together form a front cutting surface (7), and the plurality of blade bodies The body (3) has radial channels (4) for drilling fluid, said channels separating said blade bodies (3) from each other and opening outwards. It is characterized in that, passing through at least one radial fluid channel (4) arranged between the two blade bodies (3), the drill bit further comprises at least one bridge-shaped body (6, 6', 6"), The bridge-shaped body connects the two blade bodies, and the bridge-shaped body is arranged between the tool body (2) and the front cutting surface (7).

Description

technical field [0001] The present invention relates to a drill with a fixed cutting structure comprising [0002] - a tool body, and [0003] - a plurality of blade bodies (lames) consisting of a metal matrix (matrice metallique) mixed with wear-resistant particles (particule sabrasives), and said blade bodies are formed in a manner extending forward from the tool body Fixed on the tool body, the plurality of cutting bodies jointly constitute a front cutting surface, and have radial channels for drilling fluid, which enable the cutting bodies to be separated from each other and open outwards (see US -B-6,725,953). Background technique [0004] Two types of tools are used in oil drilling: one is a molette bit and the other is a fixed cutter bit. [0005] A rotary wheel bit is an assembly that includes some moving parts, while a fixed cutter bit is a single retainer without any moving parts. [0006] Within the category of fixed cutting structure drills, four subcategorie...

Claims

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Application Information

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