A strengthening tool for a rotary drill bit
A rotary, tool technology, used in drilling tools, earth-moving drilling, drilling equipment, etc., can solve problems such as lowering construction efficiency and shortening the service life of drill bits, and achieve the effects of improving efficiency, reducing wear and increasing service life.
Active Publication Date: 2018-10-12
ANHUI UNIV OF SCI & TECH
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Problems solved by technology
However, when drilling deeper roof and floor, the drill bit of the rock drill must be replaced in real time for rock formations with different hardness. Due to the long drilling distance of deep hole drilling, replacing the drill bit will reduce the construction efficiency, and at the same time, the back and forth wear in the hole will also be reduced Drill life
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[0020] Please refer to Figure 1~5 , The present invention discloses a reinforcing tool for a rotary drill bit, comprising a rotary drill bit (2), a steel strip tool (1) and a bearing (9). The steel strip tool (1) is attached to the rotary drill bit ( 2) At the center position, the steel strip tool (1) and the rotary drill bit (2) are connected through a bearing. When the drill bit is used for rock drilling, the steel strip tool (1) is destroyed under the action of impact force For the integrity of the rock, the rotary drill bit (2) performs rotary drilling and drilling on the rock whose integrity is damaged.
[0021] When the drill bit is used for rock drilling, the steel strip tool (1) will touch the rock earlier than the rotary drill bit. Under the impact of the rock drill, the steel strip tool will destroy the integrity of the rock. The overall strength of the steel will be reduced, and the rotary drill bit will be easier to drill the rock that is completely damaged. At the ...
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The invention discloses a reinforcement tool for a rotary bit. A long steel strip is attached to the center of the rotary bit and connected with a drill pipe of a rock drill. The rotary bit is connected with a power part of the rock drill and the long steel strip penetrates through the rotary bit through a bearing structure. During rock drilling, the long steel strip breaks the integrity of rock under the action of impact force, so that the mechanical properties of the rock are changed, and the rotary bit conducts rotary rock drilling on the rock subjected to integrity breaking; meanwhile, the long steel strip suffers impact counterforce of the rock, and the impact counterforce prevents the long steel strip from quickly moving in the opposite direction of bit movement under the action of an elastic device; and as acting force of a spring and a stretching rebounce device is constantly increased, when energy stored by the elastic device is constantly increased, the long steel strip is driven to move in the drilling direction of the rotary bit. The problems that time is consumed for replacing rotary bits and percussion bits due to existing different soft and hard lithologic characters, and consequently drilling efficiency is low, and traditional single rotary bits are limited in service life are solved through the reinforcement tool for the rotary bit, and efficient rock drilling with the rotary bit is achieved.
Description
Technical field [0001] The invention relates to a reinforcing tool for a rotary drill technical background [0002] Drill bits are used in underground space engineering rock drilling, surrounding rock reinforcement and other engineering drilling. Based on domestic rock drilling technology, the drill bit styles used for rock drilling with different hardness are different. Rotary drills are used for soft rock with lower hardness, and percussion drills are mostly used for hard rock with higher hardness. [0003] When drilling holes in underground space engineering, the hardness of the rock is judged according to the slag discharge situation of the drilling. If it is hard rock, the drill bit will be replaced with an impact drill bit; if it is soft rock, the drill bit will be replaced with a rotary drill bit. However, when drilling a deeper roof and bottom plate, the rock drill bit must be replaced in real time for rock formations of different hardness. Due to the long drilling distanc...
Claims
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IPC IPC(8): E21B12/04
CPCE21B12/04
Inventor 陈登红马东东汪一帆
Owner ANHUI UNIV OF SCI & TECH