All-electric ultrasonic drilling machine and drilling method thereof

Abstract

The invention discloses an all-electric ultrasonic drilling machine and a drilling method thereof. The all-electric ultrasonic drilling machine comprises a rotating mechanism, a feeding mechanism, an ultrasonic vibrating mechanism, a supporting mechanism and a control system. According to the destruction by ultrasonic frequency vibrational impact and rock resonance, ultrasonic frequency vibrating force, pressure and rotational force are combined so that cracks of rock propagate at higher speed to arrive at resonance-fatigue breaking, and this mode has the advantages of higher rock-breaking efficiency, higher energy utilization rate and low slurry usage. The ultrasonic frequency vibrational force generated by piezoelectric ceramic is applied to rock through the ultrasonic vibrating mechanism, rock-breaking efficiency of the drilling machine is greatly improved, the service life of a drill bit is greatly extended, and ultrasonic frequency vibrational drilling is achieved. In normal rotational vibrational drilling, the all-electric ultrasonic drilling machine of the invention can provide stable resonance-fatigue destruction under a frequency the same the inherent frequency of rock, hard rock breaking strength is reduced, bulk breaking is achieved, drilling speed is greatly increased, and drilling cost is greatly reduced.

Description

technical field [0001] The invention belongs to exploration equipment in the fields of geological exploration, tunnel excavation, engineering investigation and the like, and in particular relates to an all-electric ultrasonic drilling machine and a drilling method. Background technique [0002] With the rapid development of social economy, human beings need to carry out a lot of shallow drilling work in oil and gas, resource exploration and infrastructure construction, and efficient rock breaking has always been a difficult problem in mineral resource drilling and tunneling. High, strong abrasiveness, so that hard rock drilling has the problems of short drill bit life, low drilling efficiency (less than 1m / h), and high drilling cost. [0003] At present, in drilling (well) engineering, the methods of vibrating rock fragmentation include single impact (wire rope impact drilling, used for water well and engineering well construction), low frequency impact (impact rotary drilli...

AI Technical Summary

Problems solved by technology

However, the service life of the power head can only reach 50h due to severe heat, and it takes more time for maintenance and replacement, which reduces the operating efficiency.

[0014] Ultrasonic vibration rock breaking: In 2008, Huang Weiqing and Guo Junjie of Nanjing University of Aeronautics and Astronautics carried out research on piezoelectric vibration drilling, mainly aiming at drilling and sampling tasks in outer space, and developed a small piezoelectric ceramic vibration drilling test prototype for lunar patrol vehicles or special robots. The vibration force is too small and only considering the impact fatigue rock fragmentation, it has not formed a specialization, and the serialization cannot be applied to actual projects; Hangzhou Chenggong Ultrasonic Equipment Co., Ltd. uses piezoelectric ceramics to develop a series of ultrasonic vibration devices (vibration frequency 15KHz ~ 60 KHz ), successfully applied to the cutting, welding and riveting of metal materials, greatly reducing the weight of equipment, reducing power consumption, and improving work efficiency; Huang Dezhong of Shaoxing College of Arts and Sciences only theoretically discussed the installation of ultrasonic vibrators on rock drills , can improve the working efficiency of the rock drilling machine and reduce noise pollution, and the above-mentioned ultrasonic vibration rock breaking theory only considers impact fatigue rock breaking, and does not use rotary impact fatigue-resonance rock breaking

[0015] To sum up, the application of ultrasonic rock breaking technology in the field of core sampling, mineral resources mining and tunneling at home and abroad is still in the exploratory stage

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