RU1789655C - Double core tool - Google Patents

Abstract

Usage: coring. SUMMARY OF THE INVENTION: The device comprises an outer pipe. It contains a core receiver pipe with a drill bit with a shank in the lower part. The core receiver pipe is installed freely with emphasis on its upper end in the adapter, and the lower end in the shank of the drill bit. The adapter and the shank of the drill bit are made with slotted notches on the outer surfaces; and the outer pipe — with protrusions in response to them on its inner surface. The outer pipe is made with centering protrusions on the inner surface. 1 s.p. f-ly, 3 ill.

Description

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FIELD OF THE INVENTION This invention relates to coring devices in exploration and mining technology.

A double-core projectile is known in which the adapter and the impact mechanism are threadedly connected to the outer pipe and then to the drill bit. The inner core-receiving pipe is placed freely between the special thrust sleeve and the crown. A disadvantage of such tools is low reliability, since the threaded connections between the outer pipe, adapter and crown, transmitting torque and impact loads, quickly fail 1.

As a prototype, a double core projectile 2 was chosen, in which the inner core receiver pipe is connected to the drill bit by means of a threaded connection and transmits torque, and shock pulses are transmitted to the crown through the outer pipe.

The disadvantage of such shells is, firstly, low reliability due to the fact that the reflected shock waves from the bottom, affecting the threaded joint, destroys it, and, secondly, the rotation of the core-receiving pipe leads to abrasion and destruction of the core.

An object of the invention is to increase the reliability and efficiency of a core projectile.

This goal is achieved by the fact that in the design of a double core projectile containing an outer pipe, a core receiving pipe with a drill bit with a shank in its lower part and an adapter, the core receiving pipe is freely installed with its upper end resting in the adapter and the lower one in the shank drill bit, while the adapter and the shank of the drill bit are made with slotted locking grooves on the outer surfaces, and the outer pipe with mating protrusions on its inner surface, in addition 4 00 Yu Os L SL

the pipe is made with centering protrusions on the inner surface.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a general view of a projectile; in FIG. 2 shows the connection unit of the outer pipe with the shank of the crown; in FIG. Figure 3 shows the recess of the slotted locking grooves of the hvShtvv crown.

The double core projectile contains an adapter t (see Fig. 1), to which a shock machine 2 is attached to the thread. The adapter has 4 channels 3, which serve to purge the face and create a discharge in the core receiver pipe L, which is freely located at its ends abutted in the adapter 1 and the shank 5 of the drill bit 6. On the outer surfaces of the adapter 1 and the shank 5, slotted grooves 7 and 8 are made. The protrusions 9 and 10 are inserted into these grooves, respectively, made on the inner surface of the outer pipe 11. In addition, on the inside The surface of the outer pipe 11 is additionally provided with centering protrusions 12 and 13, which fix the core-receiving pipe 4 in the radial direction. A rubber ring 14 is mounted on the outer surface of the adapter 1, which is fixed by a split sleeve 15.

To assemble the projectile, it is necessary to axially move the adapter 1 or the outer pipe 11 and squeeze the rubber ring 14, which is radially secured by the split sleeve 15. Then, the adapter 1 must be turned clockwise. Then the radial protrusions 7 of the outer pipe 11, through the grooves b, fall into the locking grooves in (see Fig. 3, the grooves on the crown and the adapter are the same).

.When installing the crown b, the protrusions 10 (Figs. 2 and 3) of the lower end of the outer pipe 11 enter the longitudinal grooves a of the shank 5 of the crown. Then the crown is rotated counterclockwise and the protrusions 10 of the outer pipe extend along the arc along the grooves b and are placed in the locking grooves in which hold the crown in the axial direction, allowing it to move freely within certain limits.

Double core projectile works as follows.

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The shock of the pneumatic machine 2 strikes the upper end of the adapter 1, then the shock wave is transmitted through the inner core receiver 4 to the drill bit 6. Since the pipe 4 is freely and does not rotate, the shock waves contribute to more efficient core movement in it. The torque from the impact air machine 2 is transmitted through the slotted grooves 7 of the adapter 1, the upper row of radial protrusions 9 of the outer pipe 11, the lower row of radial protrusions 10 of the same pipe and the slotted grooves 8 of the shank 5 to the drill bit 6. This is axially movable. m direction, the connection of the adapter 1 with the outer pipe 11 and the crown 6 provides better transmission of impact energy and, most importantly, eliminates the presence of threaded connections, which usually have very low reliability. The centering protrusions 12 and 13 of the outer pipe 11 hold the inner pipe 4 in the radial direction, but do not limit its axial movement when exposed to shock loads. Compressed air from the pneumatic machine 2 enters the annular gap of the pipes through the channels 3 of the adapter 1 and then through the channels of the crown 6 (not shown) in the face. Thus, drilling occurs.

At the same time, the cut-out rock freely enters the internal cavity of the core-receiving pipe 4, i.e. a core is formed.

Claims (2)

1. A double core projectile containing an outer pipe, a core receiver pipe placed therein with a drill bit with a shank in the lower part, and an adapter, characterized in that, in order to increase the reliability and efficiency of operation, the core receiver pipe is installed freely with a stop with its upper end face in the adapter, and the bottom into the shank of the drill bit, while the adapter and shank of the drill bit are made with slotted notches on the outer surfaces, and the outer pipe with protrusions corresponding to them on its inner surface. 2. The core shell according to claim 1, with the exception that the outer pipe is made with centering protrusions on the inner surface.