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Single cone bit based on non-planar combination PDC strengthened teeth

A technology of strengthening teeth and non-planar surface, applied in drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of wear and short life, and achieve the effect of strong wear resistance, improved service life, and improved rock breaking efficiency.

Active Publication Date: 2015-05-13
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The single-cone drill bit with cemented carbide teeth currently used can only be used in soft formations. For hard and abrasive formations with high carbonate and quartz content, the early wear is quite serious and the service life is extremely short.

Method used

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  • Single cone bit based on non-planar combination PDC strengthened teeth
  • Single cone bit based on non-planar combination PDC strengthened teeth
  • Single cone bit based on non-planar combination PDC strengthened teeth

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing, protection scope of the present invention is not limited to the following:

[0020] Such as figure 1 As shown, a single-cone bit based on non-planar combined PDC reinforced teeth, it includes a bit body 1 and a cone 2, the tooth surface of the cone 2 is a spherical surface with a radius R, the axis 6 of the cone and the bit body There is an included angle β between the axes 7. In this embodiment, the included angle β is 50°. The cone 2 has a cone end face 8 that matches the drill body 1. The distance from the center of the cone 2 to the cone end face 8 is L. In the present embodiment, L is 27.5 mm, and the vertical distance from any point on the tooth surface of the cone 2 to the end face 8 of the cone is h m , there are at least five toothed belts 5 vertically arranged on the toothed surface of the toothed wheel 2, and the toothed belts 5 are spiral or straight. In this em...

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Abstract

The invention discloses a single cone bit based on non-planar combination PDC strengthened teeth. The single cone bit based on the non-planar combination PDC strengthened teeth comprises a bit body (1) and a cone (2), a tooth distributing belt (5) is distributed on the cone (2), tooth holes are formed in the tooth distributing belt (5), the tooth distributing face of the cone (2) comprises a main cutting area (9) and an auxiliary cutting area (10), the non-planar combination PDC strengthened teeth (3) are welded in the tooth holes, located in the main cutting area (9), on the tooth belt (5), and cemented carbide conisphere teeth (4) are arranged in tooth holes, located in the auxiliary cutting area (10), on the tooth distributing belt (5). The single cone bit based on the non-planar combination PDC strengthened teeth has the advantages that the adopted teeth are combined the cemented carbide conisphere teeth with the non-planar combination PDC strengthened teeth, the structure angle of the teeth on the cone teeth distributing belt is reasonably arranged, so that the wear resistance of the teeth in the main cutting area is stronger, the single cone bit can be applied to harder and abrasive stratums, staggered circular tooth distributing is adopted on the cone, so that dead cutting points can be eliminated, the rock-breaking efficiency of the bit is improved and the service life of the bit is prolonged.

Description

technical field [0001] The invention relates to a single-cone drill bit used in the fields of petroleum, mining, geological drilling, geothermal exploitation and the like, in particular to a single-cone drill bit based on non-planar combined PDC reinforced teeth. Background technique [0002] The single-cone bit has won the favor of the drilling industry due to its high ROP, and has become the main bit in the speed-up of slimhole, sidetracking and deep well drilling. The currently used single-cone drill bit is mainly composed of a cone and a bit body. The cutting teeth on the cone generally adopt cemented carbide inserts, which are arranged on the cone in a vertical row or in a spiral shape. The single-cone bit mainly relies on the scraping, shearing and twisting of the teeth to break the rock, and the teeth are pressed into the rock at varying angles; the teeth at different positions on the cone form a network-like scraping movement track at the bottom of the well, thereby ...

Claims

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Application Information

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IPC IPC(8): E21B10/16E21B10/43E21B10/50
CPCE21B10/16E21B10/50
Inventor 张德荣孔春岩常十梨冯文荣周威陈颖孙林平岳华伟谢武君
Owner SOUTHWEST PETROLEUM UNIV
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