SU1701886A1 - Vibratory drilling tool - Google Patents

Abstract

The invention relates to mining and can be used for drilling shallow wells in loose soils and for sampling. The purpose of the invention is to increase the drilling efficiency by increasing the amplitude of oscillations of the lower part of the projectile. Snar d consists of a core tube (T) 2, a core receiver T 3, a vibration immersion device 1 and a shoe (B) 4. Between T 2 and 3 there is a frame (K) 5, the upper end of which is fastened with the immersion device 1, and the bottom end is with B 4. Both T 2 and 3 are connected to B 4 with the possibility of limited axial movement. The disturbing force from the immersion device 1 through K 5 is transmitted to B 4 without weakening due to the elimination of K 5 contact with the ground. At that, B 4 strikes T 2 and 3, moving them relative to the ground and engaging in vibration displacement. The amplitude of the oscillation of the lower part of the projectile is maximum, which increases the mechanical speed of drilling and penetration per flight. 1 il. with C

Description

The invention relates to mining and can be used for drilling shallow wells in loose soils and for sampling.

The purpose of the invention is to increase drilling efficiency by increasing the amplitude of oscillations of the lower part of the drill.

The drawing shows a vibrating drill, a longitudinal section.

The vibrating drill includes a vibrating loader 1, a core drill 2 and a core receiver 3 of the pipe and a rock cutting shoe 4. Between the pipes 2 and 3, an intermediate element is placed - the frame 5 of the pipe type, the upper end of which is fixed to the loader 1, and the lower end to the shoe (on the thread) . Shoe 4 is connected to pipes 2 and 3 with the possibility of limited axial movement, for example,

Thus, the oscillation amplitude of the shoe 4 is maximum and exceeds the oscillation amplitude of the core 2 and core receiving 3 pipes by the amount of play 7 5 of the spline connection 6.

Column 2 and core receiving 3 pipes under the influence of opposite impacts carried out by shoe 4 during one cycle of vibrations of the loader 10 1 also perform forced longitudinal vibrations, and the amplitude of vibrations of the core 2 and core receiving 3 pipes relative to the soil mass in different sections of the pipes is not the same due to 15 compressive action (friction and adhesion forces) of the soil. Due to the application of a vibrational load on the lower ends of the core 2 and core receiver 3 pipes, the elastic deformations of the latter in the bottomhole part of the drill are much higher, for example, by means of a spline connection 6, and the play 7 of this connection may be less than the possible vibration amplitude of the bottom hole of the drill.

Vibrating drill works as follows.

During drilling, the disturbing force from the vibrating loader 1 is transmitted through the frame 5 to the shoe 4 of the drill. Thanks to the installation of the frame 5 between the core 2 and the core receiver 3 pipes, its contact with the soil is excluded, and the energy of the disturbing action of the loader 1 is transmitted to the shoe 4 of the projectile without loosening.

than, for example, at the surface of the soil mass. This makes it possible to more effectively overcome the resistance of the soil mass that increases sharply with depth along the lateral surface of the drill. In addition, the application of multidirectional (two-shock) loads on the core 2 and core 3 pipes directly contributes to reducing the energy intensity of their immersion in the soil mass.

Thus, drilling with an increased amplitude of oscillations of the bottomhole portion of the drill leads to an increase in the mechanical drilling speed and the magnitude of the voyage, which increases the efficiency of drilling operations.

Claims (1)

Claim Vibrating drill, including a shoe, core and core pipes connected to the shoe, and a vibrating loader, characterized in that, in order to increase drilling efficiency by increasing the oscillation amplitude of the lower part of the drill, it is equipped with a frame installed in the space between the core and core pipes, the upper end of which is fastened to a vibrating loader, and the lower end to the shoe, while core and core pipes are connected to the shoe with the possibility of limited axial clearance movement. Performing forced oscillations under the action of the loader 1, the shoe 4, both during the upward and downward strokes, initially moves freely without the participation of the core 2 and core receiver 3 pipes by the amount of play 7 of the splined joint 5, gaining the speed of the oscillatory motion. Since the gap 7 of the spline connection 6 is made smaller than the possible amplitude of the forced vibrations of the bottom hole of the drill, the shoe 4 after passing the gap 7 inflicts blows on the core 2 and core receiver 3 pipes in the spline connection 6, stragging them against the soil mass and involving vibration displacement.