Vibration Drilling

vibration drilling

[vī′brā·shən ′dril·iŋ]
(mechanical engineering)
Drilling in which a frequency of vibration in the range of 100 to 20,000 hertz is used to fracture rock.

Vibration Drilling

 

a technique involving the use of a vibrator to induce oscillations of the drilling tool. Vibration drilling is carried out at depths of 20-30 m in soft rock without rotation of the tool (the vibrator is attached to the upper end of the drill pipes); vibration drilling in hard rock and at depths greater than 30 m uses simultaneous rotation of the tool (the vibrator is installed directly above the drilling tool, or bit). In the first case, direct-acting electromechanical vibrators are most often used; in the second case, hydraulic (direct-acting, reciprocating, or double-acting) vibrators driven by the stream of flushing liquid. Shock absorbers mounted above the vibrator are used to protect the drill pipes from the harmful effects of vibrations during deep drilling.

Vibration drilling of shallow holes offers an increase in productivity by a factor of 1.5 to 2 compared to percussion-rotary drilling; vibration drilling of deep holes, particularly in hard rock, increases bit life without any adverse effect on the other performance indexes. The main problem with regard to the further development of vibration drilling is the construction of reliable vibrators. Vibration drilling is used in geological surveys, in the construction of deep-set supports, and in drilling for oil and gas. The method was invented and developed in the USSR (1948).

REFERENCES

Barkan, D. D. Vibrometod v stroitel’stve. Moscow, 1959.
Vibratsionnoe i udarno-vrashchatel’noe burenie. Moscow, 1961.
Rebrik, B. M. Vibrotekhnika v burenii, 2nd ed. Moscow, 1966.

D. D. BARKAN

References in periodicals archive ?
Based on the sonic vibration drilling technology [19], this paper proposes the basic principle of the sonic vibration grouting, develops the experimental device, and mixes the simulated fine silty sand layer.
Caption: Figure 1: Principle of sonic vibration drilling grouting.
There are many challenges facing the use of vibrations in the drilling: additional equipment or machine modifications, vibration drilling control systems are relatively undeveloped, vibration parameters depend on the application or require adjustment during drilling.
Experimental Study on Ultrasonic Vibration Drilling of Stainless Steel 0Cr17Ni4Cu4Nb Micro-Deep-Hole.
Luo, "Mechanical model for predicting thrust and torque in vibration drilling fibre-reinforced composite materials," International Journal of Machine Tools and Manufacture, vol.
Tao, "Investigation on thrust in vibration drilling of fiber-reinforced plastics," Journal of Materials Processing Technology, vol.
This study was concerned with application of numerical-experimental approach for characterizing dynamic behavior of the developed piezoelectrically excited vibration drilling tool with the aim to identify the most effective conditions of tool vibration mode control for improved cutting efficiency.
Numerical-experimental identification of the most effective dynamic operation mode of a vibration drilling tool for improved cutting performance, Journal of Sound and Vibration 331: 5175-5190.
At the second resonant frequency the drilling tool transfers the highest energy to the drill, thereby leading to the largest positive influence of vibration drilling.
This manifests in the highest observable positive effect of the vibration drilling.
& Lijiang W., (1998) Investigation of Chip in Vibration Drilling, Elsevier, Int J Mach Tool Manu, vol.