SU193407A1 - - Google Patents

Description

Known drilling tools for coal mining.

The peculiarity of the proposed drilling tool is that the extender sectors for reverse drilling are made in the form of a screw, equipped with teeth and forming, in the folded position, a screw stand for transporting the material. Such an embodiment of the drilling tool allows for improved coal loading during forward and reverse drilling.

FIG. 1 shows the drilling tool in question; in fig. 2 - reverse brew extender; in fig. 3 - auger section.

A drilling tool consists of a crown / straight drill, connected by a lock 2 with a crown 3 for reverse drilling, a flashlight 4 for directing drilling and sections of the screw 5, interconnected and a crown for reverse drilling by similar locks 2.

The crown of the reverse drilling includes a body 6 with three hinges 7, a rod 8, a hexagonal shank of which is included in the hexagon hole of the body 6, three levers 9 that are sharply associated with the flow 5 and with three segments 10 with scalded sectors 11 fitted with teeth 12 and a screw 13.

coil 15 and rod 16 for remote control of the crown. Drilling tool with speck bit

for reverse drilling it works in the following manner.

In direct drilling, the well is drilled with a straight drilling crown, while the crown is in the folded position, as shown in FIG. 1, forms a three-way agar and serves as an active loading body. As the well is drilled, the screw sections with the cores of the remote control crown of the reverse drilling drilled in them are enlarged. The first section of the screw is connected to the crown of the reverse drilling, the hexagonal end extending into the sleeve with the hexagonal hole of the rod 16, and the free hexagonal end of the rod — into the sleeve with the hexagon hole of the subsequent rod. As a result, a bond is formed between the crown and the drilling machine.

The crown-crushed 1 coal is pushed onto the three-way auger of the reverse-drilling crown and then to the screw section. In order to uncover the crown in the back drilling process, the feed is turned off.

The ice section of the screw stops on the machine, and the drill rod is turned, and the rods 16 and the screw 13 connected to them are fixed. The rotation of the drill rod is transmitted through the case of the back-drilling bit to the rod 8, which, screwing onto the screw, retracts into the hexagon hole of the body and does not follow the crown 1. At the same time, the levers 9 connected to the rod pass the segments 10, which open Turning around the hinges 7. In this way, the drilling of the crown was drilled out at the same time as the drilling rod. Then, the stopper is removed from the rod 16 on the drilling machine and the nodach is turned on (open segments 10 with screw sectors 11 teeth 12 drill the well in reverse). Crown / in this case is not involved in the work. Repulsed coal is captured by auger sectors of the segments and fed into the well, which has been drilled by direct drilling, to the screws of the drill rod.

Subject invention

Drilling tools for excavation, preferably, coal, containing a straight crown

drilling and force-expanding reamer for back drilling, characterized in that, in order to improve coal loading during the forward and reverse drilling, the extender sectors for reverse

Drilling is made in the form of a screw, equipped with teeth, which in the folded position forms a screw stand for transporting material.

I I I I I 2 8 11 Ш 6/3

Fig. / I 3