SU829863A1 - Core tool - Google Patents

Description

one

FIELD OF THE INVENTION The invention relates to mining, in particular to means of coring during exploration drilling.

Known are coring tubes containing a pipe with an adapter and a rock-breaking tip ij.

However, when drilling with such projectiles, the core entering the pipe undergoes significant destruction when interacting with rotating surfaces.

The well-known columns are: new shells, where non-rotating core pipes are installed to preserve the core. Such a projectile contains an outer pipe with a rock-breaking tip and an adapter, as well as a spring-loaded core-receiving tube installed inside the outer pipe connected by a rod and a rolling support with an adapter

2

However, in such a screen, the core may also be destroyed as a result of pushing it in the core tube.

The purpose of the invention is to increase the yield of the core by eliminating its core.

This goal is achieved by the fact that, in a known projectile, the core receiving tube is made in the form of a collet with an elastic sheath on the outer surface and with conical surfaces at the ends for interacting with the rod.

FIG. 1 shows a cutout, cut / in FIG. 2 is a cross-section A-D in FIG. one; in fig. 3 - snd d at the moment of punching the core; in fig. 4 - section BB

0 in FIG. one.

Snar d consists of an adapter 1, an outer pipe 2 with a rock-breaking tip 3, a core receiver pipe 4 with a core holder 5 and

5 rolling support, 6.

Core lifter pipe 4 is made in the form of a collet with longitudinal slots 7 evenly spaced around the perimeter

0 cut the pipe to the seat core holder 5. In the upper part of the pipe 4 has ends with stops 8.

Bearing 6 is connected to adapter 1 by means of bearings 9 and is connected 5 to rod 10, on the outer surface of which there is a step 11, groove 12 and taper surface 13. On the rod 10 a sleeve 14 is fixed to the thread, the inner surface of which is stepped. B0

The sleeve 14 has a compression spring 15 that rests with its upper end into the shoulder of the sleeve 14 and the lower end of the stops 8, the stops 8 are located in the annular cavity formed by the outer surface of the rod 10 and the inner surface of the sleeve 14. On the outer surface of the pipe 4 is elastic sleeve 16.

On the drill pipe, the projectile is lowered into the well, placed on the face, and includes flushing fluid and rotation. In this case, under the action of the compressed spring 15, the pipe 4 is in its lower position (relative to the rod 10). The stops 8 with their lower inner surfaces are pressed against the shoulder 11 of the stem 10. In this case, the inner surface of each stop 8 mates with the groove 12 of the stem, and the outer surface of the stops 8 - with the inner surface of the sleeve 14. As the core moves in the cavity of the core tube, the core self-cores impedes the flow of flushing fluid, which carries sludge from the gap between the inner surface of the core, through the slots 7 and further through the cavity of the rod 10 and the radial channels in it. In the case of core self-coreing, the core-receiver tube 4, compressing the spring 15, moves relative to the rod 10 upward. In this case, with their inner surface, the stops 8 begin to move along the conical surface 13.

stem 10. The stops 8 move apart and, consequently, the diameter of the inner cavity of the pipe increases. The resistance to moving the pipe 4 down in the meteor of the spell decreases and under the action of the spring 15 the pipe 4 moves down and occupies its lower polonium.

The proposed projectile provides an increase in the yield of core during drilling in fractured, fractured and weakly cemented rocks.

Claims (2)

1. Grebenyuk A. A. Technique and technology of core extraction. M., Nzdra, 1973, p. 48. 2. In the same place 18, fig. b. ut.1 L-A W (rig 2 W