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Fractal design method for roller bit gear teeth structure

A roller cone bit and design method technology, applied in the direction of drill bits, drilling equipment, earthwork drilling and mining, etc., can solve the problems of obvious isotropy and single type of tooth structure design of the roller cone bit, so as to improve the rock breaking efficiency and operation The effect of convenience, great implementation value and social and economic benefits

Inactive Publication Date: 2011-04-06
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a fractal design method for the tooth structure of the roller cone bit, which is used to solve the problems of obvious isotropy and single type in the tooth structure design of the existing roller cone bit

Method used

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  • Fractal design method for roller bit gear teeth structure
  • Fractal design method for roller bit gear teeth structure
  • Fractal design method for roller bit gear teeth structure

Examples

Experimental program
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Embodiment 1

[0023] combine figure 1 , figure 2 As shown, the fractal design method of the gear tooth structure of this roller cone bit is composed of two consecutively arranged teeth of different heights with the initial value of the fourth order, and the adjacent teeth in the same order are offset from each other, and the law is The 1st order fractal tooth distribution of the 4th order fractal tooth distribution consists of 2 teeth, see image 3 As shown, there is a deviation H between the tooth height and tooth diameter of the first stage two teeth 1 、D 1 ; The second-order fractal tooth distribution is composed of 2 2 Composed of two gear teeth, the 2 2 A gear tooth consists of 2 groups of first-order gear teeth, that is, the 2 2 Each gear tooth is divided into 2 groups, each group has 2 gear teeth, and there is a deviation H between the tooth height and tooth diameter of the 2-group shaped gear teeth in the second stage 2 、D 2 ; The third-order fractal gear tooth distribution ...

Embodiment 2

[0025] combine Figure 4 , Figure 5 As shown, the tooth distribution of the roller cone bit with the initial value of 3 in the third order is composed of teeth of different heights arranged continuously in each order, and there is mutual offset between adjacent teeth in the same level, and its The rule is that the first-order fractal tooth distribution of the third-order fractal tooth distribution consists of three teeth, see Figure 6 As shown, there is a deviation H between the tooth height and tooth diameter of the first three teeth 1 、D 1 ; The second-order fractal tooth distribution is composed of 3 2 Composed of 3 gear teeth, these 3 2 A gear tooth consists of 3 sets of first-order gear teeth, that is, the 3 2 Each gear tooth is divided into 2 groups, each group has 3 gear teeth, and there is a deviation H between the tooth height and tooth diameter of the 3-group shaped gear teeth in the second stage 2 、D 2 ; With the increase of order, the number of gear teeth ...

Embodiment 3

[0027] combine Figure 7 , Figure 8 As shown, the tooth distribution of the roller cone bit with the initial value of 3 in the third order is composed of teeth of different heights arranged continuously in each order, and there is mutual offset between adjacent teeth in the same level, and its The rule is that the first-order fractal tooth distribution of the third-order fractal tooth distribution consists of three teeth, see Figure 9 As shown, there is a deviation H between the tooth height and tooth diameter of the first three teeth 1 、D 1 , the characteristic of the deviation is that there is a deviation H between the tooth height and tooth diameter of the first tooth and the third tooth among the three teeth 1 、D 1 , there is a deviation H between the tooth height and tooth diameter of the third tooth and the second tooth 1 、D 1 , the tooth height of the internal gear teeth of this stage is high and low, and the tooth diameter is large and small; the number of teet...

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Abstract

The invention relates to a fractal design method for a roller bit gear teeth structure, and belongs to a method for designing size, number and distribution of roller bit gear teeth in petroleum drilling. The fractal design method for the roller bit gear teeth structure is characterized in that: the structure consists of N-order (N is equal to 2 to 9) continuously arranged gear teeth, the number of initial values of which is M (M is equal to 2 to 9), wherein the gear teeth have non-uniform height; the adjacent gear teeth of the same order have mutual offset; and the structure has the rule thatthe first-order fractal gear teeth of the N-order fractal gear teeth consist of M gear teeth, the teeth heights and the teeth diameters of the M gear teeth of the first order have deviations H1 and D1, the second-order gear teeth consist of M groups of first-order gear teeth, the teeth heights and the teeth diameters of the M groups of fractal gear teeth in the second order have deviations H2 andD2, the number of the gear teeth of the Nth order is MN, the gear teeth of the Nth order consist of MN-1 groups of first-order gear teeth, and the teeth heights and the teeth diameters of the MN-1 groups of fractal gear teeth in the N order have deviations HN and DN. The bit gear teeth distribution is in personalized development, and the method is convenient to operate and has low cost.

Description

1. Technical field: [0001] The invention relates to a method for designing the tooth size, quantity and distribution of a roller cone bit in oil drilling, in particular to a fractal design method for the tooth structure of a roller cone bit. 2. Background technology: [0002] Rotary drilling is the main rock-breaking method in oil drilling, and the drill bit is the most important rock-breaking tool. The drill bits used in oil drilling are divided into three categories: drag bit, roller cone bit and diamond material drill bit, among which the roller cone bit accounts for 80% to 90% of the total footage. The optimized design of the roller cone bit is of great significance to the drilling efficiency, drilling quality and cost reduction in drilling engineering. [0003] The method for designing the tooth quantity, size and distribution of the roller cone bit in the prior art is the European geometric method, that is, the tooth size of the roller cone bit is designed to be equal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/16
Inventor 李玮闫铁毕雪亮梁颖
Owner NORTHEAST GASOLINEEUM UNIV
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