SU870662A1 - Rock-breaking tool - Google Patents

Description

(54) BREED-DEPENDENT SHEATH

one

The present invention relates to mining, in particular to devices for drilling wells.

A rock-breaking projectile is known, containing freely rotating balls installed in the supporting elements associated with the stem of the power cylinder 1.

The disadvantage of this projectile is the high specific consumption of explosive when using the well drilled by this projectile.

Also known rock-cutting projectile, including disk working tools installed in parallel bearing elements, between which is placed the wedge 2.

The disadvantage of this projectile is the low depth controllability of the proposed furrows on the borehole walls.

The purpose of the invention is to increase the efficiency of drilling and blasting operations by making longitudinal slots of the required depth in the well.

The goal is achieved by the fact that the rock-cutting projectile, including disk working tools installed in parallel bearing elements.

between which there is a spreading wedge, provided with an additional wedge and power cylinder, the rod of which is connected with the expanding wedge, while the guide grooves are made on the wedges, in which the supporting elements are mounted for movement.

FIG. I shows the rock-breaking projectile in working condition, partially in section; in fig. 2 and 3 - sections A-A and BB in FIG. one.

The rock-breaking projectile contains a power cylinder 1, to the rod 2 of which a wedge 3 is attached, and to the body by means of rods 4 - a counter wedge 5. In the guides 6 wedges 3 and 5, load-bearing bars 7 are installed with elongated 15 holes 8, in which axle x 9 mounted disk cutters 10.

Breed destructive d d works as follows.

For operation, the projectile is connected to the rod string (not shown in the drawing), inserted into the drilled well, and the working medium (liquid or gas) of the corresponding head (pressure) is fed into the power cylinder 1 through the shaft. With

This moves the rod 2 out of the cylinder, and all the device part that is in front of the cylinder moves forward, so that the wedges 3 and 5 move towards and dismount the bearing bars 7. As a result, the disc stitches 10 are pressed against the borehole walls. Subsequently, reciprocating movements are reported to the device through the rod string by the feed mechanism (not shown), as a result of which the roller cone 10 rolls along the borehole wall and make longitudinal grooves in it in a length equal to the feed amount. When the grooves are cut to the full depth of 3 and 5 by the protrusions 11, they rest against the ends of the supporting bars 7. After that, the pressure of the working medium is relieved and the device is moved to a new place by the feed mechanism, when the bars 10 are pressed, the supporting bars 7 are compressed, as a result of which the piston 12 is extruded from it, the working medium, and the cycle repeats.

Claims (2)

1. USSR author's certificate number 587248, cl. E 21 S 17/00, 1975. 2. USSR author's certificate for application number 2482484, cl. E 21 C 17/00, 1977 (prototype).