SU1406381A1 - Planetary drilling bit - Google Patents

Abstract

The invention relates to a drilling technique for drilling large diameter wells. The goal is to increase the drilling efficiency by increasing the damage rate at the expense of increasing the bit armament. In case 1, a disk 5 is installed in which radial grooves are made. In the grooves, by means of the spacer element 11, holders 9 are mounted, on which they are mounted in the plane of symmetry, perpendicular to the axis of rotation of the disk 5, straight axes 8. On the axis x 8, there are pairs of rollers (W) 6. On different sides of the holder 9. R 6 each pair. When the bit moves, the plane of the disk 5 coincides with the diametral plane of the borehole and half of the Ø 6 is in contact with the bottom. At the moment the disk 5 leaves the diametrical plane of the borehole Ш 6 roll over its walls with a blow, destroying the rock .. 1 h. n. f-ly, 3 ill. (L

Description

05 CO 00

A 8-

I The invention relates to a drilling technique designed for drilling wells of large diameter and mine shafts with no-Moidu planetary drills. I The aim of the invention is to increase the drilling efficiency by increasing the LOSS OF damage to the bottom due to the increase in the rigging of the bit. i FIG. 1 shows a drill bit for plastics drills, open, seeded; in fig. 2 - About the same, side view; in fig. 3 shows section A-A in FIG. one.

The bit includes a housing 1 with a threaded adapter 2 and paws 3, on which a disk 5 is installed by means of sub-spindle 4. The 1-d axis of the disk is perpendicular to the longitudinal axis of the casing 1. On the disk 5, Iparosh-1-6 6 are mounted pairwise and opposite to each other on bearings 7. Each The shara-lueK has a single rectilinear axis 8, rigidly connected to radially extended holders 9. Axes 8 lie in the plane of symmetry of disk 5, which is perpendicular to its axis of rotation. The holders 9 are fixed in the radial pairs of the disk 10 by means of a spacer element made in the form of a cone 11 with re- (yu and a conical closed nut 12 installed in a transverse bore. At the junction of the holder and the disk 5.

Chisel works as follows.

In case of off-the-track drilling, the bit performs a complex movement, rotating at a high frequency around its longitudinal axis and at the same time slowly rolling around the axis of the borehole axis. At the moment of coincidence of the plane of the disk 5 with the diametrical plane of the borehole half of all the cones 6

0

five

0

five

0

in contact with the bottom. In a position perpendicular to this, only the bottom pair of cones come into contact with the face. At the moment the wheel enters the diametrical plane of the borehole, the shuffles roll over its walls with a blow, which ensures intensive destruction of the rock. Because the cone rotates at the bottom of the disk faster than the disk, their armament and supports are worn out before the disk bearing. When replacing worn cones, screw nuts 12, choose a spacer and remove the holders 9 from the radial grooves 10. Instead, install new cones with the holders, fix them on the disk 5 in reverse order.

Claims (2)

1. A drill bit for planetary drilling, comprising a housing, a disk mounted for rotation with the housing, and cone cutters arranged in pairs on rectilinear axes mounted in a plane of symmetry, perpendicular to the axis of rotation of the disk. drilling efficiency by increasing the impact density at the expense of increasing the bit’s rigging, the disk is equipped with holders and radial grooves are made in it, while the holders are fixed in the radial grooves, and the axis of the cones are mounted on the holders each pair are placed on opposite sides of the holder. 2. The hammer according to claim 1, characterized in that each holder is fixed by means of a spacer element. BUT-/ (Rig.d.