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Diamond drill bit for drilling fractured hard rock stratum

A diamond bit and diamond technology, applied in the direction of drill bits, drilling equipment, earthwork drilling, etc., can solve the problems of reducing the drilling efficiency and service life of the drill bit, aggravating the wear of the matrix and diamond, and affecting the drilling efficiency of the drill bit. Lightweight, effective rock breaking, ability-enhancing effect

Active Publication Date: 2021-11-09
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When drilling into fractured rock formations or hard and brittle formations, a large amount of coarse-grained rock powder will be formed. They cannot be taken away by the drilling fluid in time and quickly, which will cause a large amount of coarse-grained rock powder to be repeatedly broken on the working lip of the drill bit, which greatly intensifies the The wear of the matrix and diamond greatly reduces the drilling efficiency and service life of the drill bit, and increases the energy consumption of rock breaking
For the concentric round-toothed diamond drill bits commonly used in construction at present, the cutting tooth tops will be worn quickly and form a flat surface, which greatly affects the drilling efficiency of the drill bit

Method used

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  • Diamond drill bit for drilling fractured hard rock stratum
  • Diamond drill bit for drilling fractured hard rock stratum
  • Diamond drill bit for drilling fractured hard rock stratum

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Embodiment Construction

[0017] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0018] Please refer to Figure 1 to Figure 3 , a diamond drill bit for drilling into fissures in hard rock formations of the present invention comprises a bit body 1 and a bit matrix arranged at the end of the bit body 1, the bit body 1 is in the shape of a circular tube, and the bit body 1 is away from the bit tire The inner wall at the end of the body is provided with a connecting thread for connecting a core pipe or a drill pipe.

[0019] The drill bit matrix includes a plurality of sectors, all sectors are equal in size, and all sectors are uniformly and fixedly connected to the end of the drill body 1 in the circumferential direction, all sectors are arranged at intervals, and the gap between adjacent sectors is The nozzles 4, all nozzles 4 have th...

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Abstract

The invention provides a diamond drill bit for drilling fractured hard rock stratum. The diamond drill bit comprises a drill bit body and a drill bit matrix arranged at the end of the drill bit body, the drill bit matrix comprises a plurality of fan-shaped blocks arranged on the drill bit body in a surrounding mode, a gap between every two adjacent fan-shaped blocks is a water gap, each fan-shaped block comprises a connecting layer and a bottom blade layer, the bottom blade layer comprises a plurality of protruding arc-shaped blades, all the arc-shaped blades are arranged in a concentric circle structure, each arc-shaped blade comprises a wear-resisting piece and a diamond matrix, wedge faces which are obliquely arranged are formed on the upper surfaces of all the wear-resisting pieces located on the same fan-shaped block, a reinforcing layer which is obliquely arranged is arranged in each diamond matrix, and reinforcing layer is embedded into the diamond matrix. The diamond drill bit can crush medium-hard and above rocks, the drilling efficiency of the diamond drill bit can be effectively improved, the service life of the diamond drill bit can be effectively prolonged, and the drilling engineering cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of geological drilling devices, in particular to a diamond drill bit for drilling into cracked hard rock formations. Background technique [0002] At present, in geological drilling, diamond-impregnated drill bits are generally used to drill into hard and very hard rocks. During the drilling process, the hardness, fissure or fragmentation of the rock will have a great impact on the performance of the diamond drill bit. When drilling into fractured rock formations or hard and brittle formations, a large amount of coarse-grained rock powder will be formed. They cannot be taken away by the drilling fluid in time and quickly, which will cause a large amount of coarse-grained rock powder to be repeatedly broken on the working lip of the drill bit, which greatly intensifies the The wear of the matrix and diamond greatly reduces the drilling efficiency and service life of the drill bit, and increases the energy co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/43E21B10/54E21B10/60
CPCE21B10/43E21B10/54E21B10/602
Inventor 段隆臣方小红赵小军谭松成契霍特金V.F.汤凤林
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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