SU1442662A1 - Drilling tool - Google Patents

Abstract

The invention relates to mining. The goal is to increase the efficiency of the drill by accelerating the change of drill bits due to their unification. On the drill string is fixed collector with clips. The cage contains peripheral percussion (PU) and central firing pin (CC) associated with the collector. In boxes 3, the PU and DT are secured by the shanks 12 drill bits, fixed from falling out by the stoppers 20 and installed in the PU with the possibility of free rotation. In the box 3, each PU is installed with the possibility of rotation of the ring holder 6 with radial sockets 7 and 8. In the box 3 of the control center and the shanks 12, longitudinal grooves 13 and 14 are made under the locking 9 and leading 10 rolling bodies interconnected in pairs by means of transverse grooves 15. The bodies 9 and 10 of rolling in the PU are installed in slots 7 and 8 and in the slots 13 and 14 of the shank 12, and in the control center - in the slots 13 and 14 of the shank 12 and box 3. Due to the rotation of the drill bit, the presence of the cage 6 in the bush 3 PU and friction on the walls of the well-hole of their crowns are rotated in boxes 3 along with clips 6 in S rolling bodies 9 and 10, which are simultaneously elements of quick-release bionant fastening. The crown of the control unit, fixed in its box 3 by bodies 9 and 10 of rolling, rotates together with the drilling rig. 6 Il. a (f

Description

N

4ik

to

O5 O)

Yu

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

The purpose of the invention is to increase the efficiency of the drill by accelerating the change of crowns due to their unification.

FIG. 1 shows a drill, a general view; in fig. 2 is a view A of FIG. one; in fig. 3 - axle box with a drill bit; in fig. 4 - peripheral hammer box with a drill bit; in fig. 5 is a section BB in FIG. 3; in fig. 6 is a sectional view BB in FIG. four.

The drill bit contains a central drummer 1 and peripheral drummers 2. Each of the drummers has a bush 3, rigidly connected to the drummers and 2 with a spring 4 and made with a central socket 5. In the peripheral drummers 2 ring rings 6 are installed with radial sockets 7 and 8 under the castle 9 and the leading 10 body swing. Inside the strikers 1 and 2, the pistons 11 reciprocate. In the axle box 3 of the central drummer 1 and the holder 6 peripheral drummers 2, the shanks of 12 drill bits are fixed by means of longitudinal grooves 13 and 14, connected in pairs by transverse grooves 15. Carbonated core 16. inserts 17 and 18. Crowns are fixed in slots 5 of box 3 by ring 19 and locking element 20. A through hole 21 is made inside each crown for the passage of compressed air.

The drilling rig operates as follows.

The crowns are inserted into the central hole 5 in the central nest 5 by the shanks 12, and into the central hole of the sleeve 6 in the peripheral impactors 2. At the same time, the swing lock bodies 9 go into the longitudinal grooves 14. When the lock roll bodies 9 are compared with the transverse grooves 15, t turn crowns around the axis. The locking bodies 9 rolling in this case go into the longitudinal grooves 14, after which the drill crown of the central drummer is fixed in the box 3, and the drill bits of the peripheral drummers - B holders 6 (removal of the crowns in the reverse order). When the crowns of the peripheral strikers are rotated (during their installation and removal), the clips 6 are pre-clamped against rotation. During the drilling process, the wells and the strikers 1 and 2 are moved around the circumference of a certain diameter. Pistons 11 hit the ends of the shanks of 12 crowns. Under the action of the impact energy, the inserts 17 and 18 of the head portions of 16 crowns destroy the rock. Due to the rotation of the drill bit, the presence of an annular casing 6 in the axle boxes 3 of the peripheral drummers 2 and friction against the borehole walls, their crowns are rotated in the axles 3 together with the annular clips 6 on the locking 9 and leading 10 rolling bodies that are simultaneously

with- and quick-bayonet fastening elements. The crown of the central hammer, fixed in its box by the lock and leading bodies 9 and 10 of rolling, rotates together with the drill string.

20

Claims (1)

Invention Formula v. The drill bit includes a collector with collars fixed on the drill string and placed in the collars and peripheral and central drums connected to the collector, in the axle boxes of which drill bits are fixed by means of stoppers and installed in peripheral strikers with the possibility of free rotation, differing from that, in order to increase the efficiency of the drill string by speeding up the change of drill bits due to their unification, the bush of each peripheral drummer is fitted with a set The ring-shaped oval with the possibility of rotation, made with radial jacks, and all the drum axle boxes are equipped with leading and lock rolling bodies, while in the axle box of the central drummer and the shanks of the drilling crowns there are longitudinal slots for lock and leading roll bodies, 0 coupled to each other in pairs by means of transverse grooves, the rolling bodies in the peripheral impactors installed in the radial slots of the annular holders and the longitudinal grooves of the drill shanks g of crowns, and in the central drummer in the longitudinal grooves of the shank of the drill bit and axle box. Vida CPU. 2 77 j i ::: FIG. five 8-8 12