All-electric ultrasonic drilling machine and drilling method thereof

Abstract

The invention discloses an all-electric ultrasonic drilling machine and a drilling method. The drilling machine includes a rotary mechanism, a feeding mechanism, an ultrasonic vibration mechanism, a supporting mechanism and a control system. The combination of frequency vibration force, pressure and rotational force accelerates the expansion of rock cracks to form resonance-fatigue crushing, which has higher rock crushing efficiency and energy utilization rate, and has the characteristics of less mud consumption. Through the ultrasonic vibration mechanism, the ultrasonic frequency vibration force generated by the piezoelectric ceramic acts on the rock, which greatly improves the rock breaking efficiency of the drilling rig and the service life of the drill bit, and realizes ultrasonic frequency vibration drilling. The present invention can stably carry out resonance-fatigue damage consistent with the natural frequency of the rock during normal rotary vibration drilling, reduce the crushing strength of hard rock, realize large-volume crushing, greatly increase the drilling speed and reduce the drilling cost.

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...

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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 ul

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