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Bionic tooth type cutting tooth

A technology for cutting teeth and teeth, which is applied in the field of bionic tooth-type cutting teeth, can solve problems such as breaking and easy falling off, and achieve the effects of enhancing the fixing effect, increasing the contact area, and enhancing the cushioning capacity

Pending Publication Date: 2021-09-03
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of this application is to provide a bionic tooth-type cutting tooth, aiming at improving the problem that the existing drill bit cutting teeth are easy to fall off and break

Method used

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  • Bionic tooth type cutting tooth
  • Bionic tooth type cutting tooth
  • Bionic tooth type cutting tooth

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0034] Please refer to figure 1 , with reference to figure 2 , the application provides a bionic tooth-type cutting tooth 1, which mainly includes a tooth-like body, the tooth-like body includes a base 2 made of hard alloy and a thin polycrystalline diamond layer 3 connected above the base 2, the polycrystalline diamond The diamond thin layer 3 is integrally formed with the base body 2, and the diameter of the polycrystalline diamond thin layer 3 gradually decreases from the point in contact with the base body 2 toward the direction away from the base body 2, and the thickness is relatively thin. At the same time, the base body 2 has a tooth-like structure, and the base body 2 includes a tooth crown 4, a tooth neck 5, and a plurality of protruding tooth roots 6 arranged at intervals from bottom to top, and a polycrystalline diamond thin layer 3 is arranged on the upper surface of the tooth crown 4 , the raised tooth root 6 is used to insert the positioning hole 10 in the fix...

no. 2 example

[0049] Please refer to image 3 , the present application provides a bionic tooth-type cutting tooth 1, the structure of which is substantially the same as that in the first embodiment, the difference is that in this embodiment, the distance between the two furthest protruding dedendums 6 is less than The diameter of the base body 2, that is, a transition step 12 is provided between the tooth-like body of the cutting tooth and the raised tooth root 6, so that the raised tooth root 6 part is smaller than the diameter of the tooth-like body, so that it protrudes during installation. The part of tooth root 6 can be completely protected by the fixed-tooth socket 9 on the blade of the drill bit, so as to prevent the cutting teeth from excessive contact with the external environment, which will cause the welding part to be subjected to excessive erosion during the cutting process, resulting in a decrease in bearing capacity, and further It can effectively improve the tooth fixing ab...

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Abstract

The invention provides a bionic tooth type cutting tooth, and belongs to the field of well drilling. The bionic tooth type cutting tooth comprises a tooth-shaped body, wherein the tooth-shaped body comprises a base body which is made of hard alloy and a polycrystalline diamond thin layer which is connected to the upper part of the base body; the base body comprises a tooth crown, a tooth neck and a plurality of protruding tooth roots which are arranged at intervals in sequence from bottom to top, the polycrystalline diamond thin layer is arranged on the upper surface of the tooth crown, and the protruding tooth roots are inserted into positioning holes in tooth fixing nest grooves of a drill bit blade; and tooth grooves are formed between every two adjacent protruding tooth roots, and the opening direction of each tooth groove faces the end away from the polycrystalline diamond thin layer. According to the structure, the cutting tooth can be effectively prevented from falling off due to impact, cutting stress which is borne by the cutting tooth can be effectively dispersed, stress concentration is reduced, and the tooth fixing capacity is enhanced.

Description

technical field [0001] The present application relates to the field of drilling, in particular to a bionic tooth-type cutting tooth. Background technique [0002] At present, due to the characteristics of long life and high efficiency of PDC (polycrystalline diamond compact) drill bits in the process of drilling into soft and medium hard formations, it has gradually replaced roller cone bits in the oil drilling industry and has become the mainstream of the industry. The PDC drill bit is mainly composed of tungsten carbide powder, nickel powder, copper-tin alloy and other powders processed by sintering or high-strength low-alloy steel as the base material, and the diamond composite sheet fixed on the front end of the cutting surface of the drill blade by brazing. tooth composition. [0003] The PDC bit mainly breaks rocks in the form of PDC cutting teeth shearing, and achieves efficient drilling in soft to medium-hard formations, while cutting teeth often occur when facing c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/46
CPCE21B10/46
Inventor 但斌斌邓思洪容芷君熊凌陈刚王伟都李平龚昌运乔瀚屈朋举杜涛蒋麒麟李国锋朱潘蕾
Owner WUHAN UNIV OF SCI & TECH
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