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Compound single cone bit

A single-cone, compound technology, used in drill bits, drilling equipment, earth-moving drilling, etc., can solve problems such as shortening of the life of the drill bit, wear of the cutting teeth, and decrease in the ROP of the drill bit, so as to enhance the rock breaking efficiency and reduce the load. , the effect of enhanced wear resistance

Active Publication Date: 2013-01-02
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the single cone bit is working at the bottom of the well, the teeth on the cone wear unevenly, and the cutting teeth in the constant contact area (cone tip part) wear faster and most seriously, which reduces the mechanical penetration rate of the bit and reduces the life of the bit

Method used

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  • Compound single cone bit
  • Compound single cone bit
  • Compound single cone bit

Examples

Experimental program
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Embodiment Construction

[0026] Such as figure 1 , 3 , shown in 5 and 6: a compound single cone bit, comprising a bit body 1, a cone 2, a cone point 3, the cone 2 and the cone point 3 are arranged with cutting teeth 5, the drill bit The body 1 is provided with a journal 4 , and the cone 2 is connected in rotation with the journal 4 , and the feature is that the cone tip 3 is fixedly connected with the front end of the journal 4 .

[0027] The cutting teeth 5 on the gear tip 3 are polycrystalline diamond composite sheets, polycrystalline diamond composite teeth, thermally stable polycrystalline diamond cutting teeth, natural diamond cutting teeth, impregnated diamond cutting teeth, carbide cutting teeth , cubic boron nitride cutters, ceramic cutters, cutters containing diamond or cubic boron nitride.

[0028] Such as Figure 7 shown When the drill bit is drilling, driven by the rotation of the bit body 1, the cone 2 revolves around the central axis of the drill bit and at the same time rotates aro...

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Abstract

Disclosed is a combined one cone bit comprising a bit body (1), a cone (2) and a cone top (3), wherein cutting teeth (5) are provided on the cone (2) and the cone top (3), a journal (4) is provided on the bit body (1), the cone (2) and the journal (4) form a rotatable connection, and the cone top (3) is in a fixed connection with the front end of the journal (4). The one cone bit is a one cone bit combined from a fixed cutting structure and a non-fixed cutting structure, which can improve the rock breaking effectiveness of the drill bit and the life of the cutting teeth.

Description

technical field [0001] The invention belongs to the technical fields of drilling equipment such as petroleum and natural gas, mining engineering, building foundation engineering construction, geology, hydrology, etc., and specifically relates to a compound single cone bit. Background technique [0002] The drill bit is a rock-breaking tool used in drilling engineering to break rock and form a wellbore. The single-cone bit is one of the main rock-breaking tools used in drilling engineering, especially in slim hole drilling of deep and ultra-deep wells. [0003] The single-cone bit mainly uses the teeth on the cone to squeeze and cut the rock to break the rock. Existing single-cone drill bits all belong to non-fixed cutter drill bits. When the drill bit rotates, the cone rotates around the journal, and the teeth on the cone scrape and cut rock in a mesh form at the bottom of the well. A part of the teeth on the cone of the single-cone bit (the tip of the cone) is always in c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B10/08E21B10/50
CPCE21B10/08E21B10/16
Inventor 陈炼杨迎新林敏任海涛
Owner SOUTHWEST PETROLEUM UNIV