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Drilling pre-formed polycrystalline diamond composite sheet with efficient chip discharge function

A technology of polycrystalline diamond and pre-shaping, which is applied to drill bits, earthwork drilling, drilling equipment, etc. It can solve problems such as tooth chipping, difficult-to-drill formations, and drill bits prone to tooth chipping, so as to reduce grinding heat and improve drilling efficiency. Improve efficiency and reduce the effect of chipping

Active Publication Date: 2017-05-31
SF DIAMOND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above-mentioned extremely difficult to drill formations and the drill bit is prone to tooth chipping, the patent CN200820070865.5 provides a solution to the problem of tooth chipping caused by crack propagation on the surface, but it is not yet competent in efficient chip removal.

Method used

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  • Drilling pre-formed polycrystalline diamond composite sheet with efficient chip discharge function
  • Drilling pre-formed polycrystalline diamond composite sheet with efficient chip discharge function
  • Drilling pre-formed polycrystalline diamond composite sheet with efficient chip discharge function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as image 3 and Figure 4 As shown, it is a preformed polycrystalline diamond compact with four teeth of similar structure for efficient chip removal. refer to image 3 As shown, the cutting edge teeth 103 of this four-edge tooth composite sheet have a radial extension length of 1.87mm and a height of 1.23mm, and the angle between it and the outer edge surface 102 is 90°; and the chip removal groove 104 and the cutting edge teeth 103 are at 22 ° are connected in a circular distribution, and the angle between them and the outer edge surface 102 is 112°. The chamfer between the cutting edge teeth 103, the chip removal groove 104 and the outer edge surface 102 is 0.35 mm. refer to Figure 4 As shown, the cutting edge teeth 103 of this four-blade tooth composite sheet have a radial extension length of 1.83mm and a height of 1.23mm, and the angle between it and the outer edge surface 102 is 99.5°; while the chip removal groove 104 and the cutting edge teeth 103 are ...

Embodiment 2

[0034] Such as Figure 5 and Figure 6 As shown, it is a five-blade preformed polycrystalline diamond compact with a similar structure for efficient chip removal. refer to Figure 5 As shown, the cutting edge teeth 103 of this five-blade tooth composite sheet have a radial extension length of 1.91mm and a height of 1.23mm, and the angle between it and the outer edge surface 102 is 90°; ° are connected in a circular distribution, and the angle between them and the outer edge surface 102 is 110°. The chamfer between the cutting edge teeth 103, the chip removal groove 104 and the outer edge surface 102 is 0.35 mm. refer to Figure 6 As shown, the cutting edge teeth 103 of this five-blade tooth composite sheet have a radial extension length of 1.87mm and a height of 1.23mm, and the angle between it and the outer edge surface 102 is 100.1°; while the chip removal groove 104 and the cutting edge teeth 103 are at 35.6 ° are connected in a circular distribution, and the angle bet...

Embodiment 3

[0037] Such as Figure 7 and Figure 8 As shown, it is a high-efficiency chip removal preformed polycrystalline diamond compact with eight teeth of similar structure. refer to Figure 7 As shown, the cutting tooth 103 of the eight-tooth composite sheet has a radial extension length of 1.78 mm and a height of 1.23 mm, and its angle with the outer edge surface 102 is 90°; while the chip removal groove 104 and the cutting tooth 103 are at 23 ° are connected in a circular distribution, and the angle between them and the outer edge surface 102 is 113°. The chamfer between the cutting edge teeth 103, the chip removal groove 104 and the outer edge surface 102 is 0.40 mm. refer to Figure 8 As shown, the cutting tooth 103 of the eight-tooth composite sheet has a radial extension length of 1.76 mm and a height of 1.23 mm, and its angle with the outer edge surface 102 is 99.3°; while the chip removal groove 104 and the cutting tooth 103 are at 32.8 ° are connected in a circular dis...

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Abstract

The invention discloses a drilling pre-formed polycrystalline diamond composite sheet with an efficient chip discharge function. The drilling pre-formed polycrystalline diamond composite sheet comprises a polycrystalline diamond layer and a hard alloy matrix support body. The hard alloy matrix support body is adhered with the polycrystalline diamond layer; the polycrystalline diamond layer comprises an upper surface and an outer edge surface, cutting blade teeth with radial centers are formed in junction regions of the upper surface and the outer edge surface, and chip discharge grooves with radial centers are formed in the junction regions of the upper surface and the outer edge surface; the cutting blade teeth and the chip discharge grooves are connected with one another in certain angle directions, the cutting blade teeth radially extend to be annular distributed, and the chip discharge grooves are radially perforated to be annularly formed. The drilling pre-formed polycrystalline diamond composite sheet with the structure has the advantages that the drilling pre-formed polycrystalline diamond composite sheet is high in sharpness and has an efficient chip discharge merit, the drilling efficiency can be greatly improved, balling phenomena can be prevented, and the control stability of well drilling platforms can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of superhard composite materials, in particular to a preformed polycrystalline diamond composite sheet for drilling with high-efficiency chip removal, which is mainly used in the fields of oil drilling, engineering excavation, ore prospecting and the like. Background technique [0002] Diamond is regarded as an ideal drilling material and cutting material for its ultra-high hardness and wear resistance, and the advent of polycrystalline diamond compact (PDC) has become an important milestone in the development history of diamond application technology. At present, PCD composite sheet has been used as a super wear-resistant cutting element in rotary drill bits, diamond drill bits and other tools, and it is widely used in oil and natural gas drilling and other fields. With the transformation and innovation of exploration concepts, unconventional oil and gas (such as shale oil, gas, etc.) In formations such as...

Claims

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Application Information

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IPC IPC(8): E21B10/54E21B10/43
CPCE21B10/54E21B10/5673
Inventor 赵东鹏杜卫锋牛同健文腾飞张春林方海江
Owner SF DIAMOND CO LTD
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