SU1657603A1 - Core barrel - Google Patents

Abstract

The invention relates to mining, to tools for drilling with coring and preservation of the natural environment. The aim of the invention is to increase reliability. The column projectile comprises an outer casing with a rock-cutting tool and an inner core-receiving tube with outer channels communicating at the inlet and the outlet with the cavity of the pick-up tube filled with an antifriction insulating substance. From the bottom, the cavity is closed by a movable piston having a rod, a rocker of the destructive tool protruding below the edge and a cavity insulated from the external environment by a destructible diaphragm. The piston is made with two sealing elements on the side surface, while the exit of the external channels is located in the zone adjoining with the interval between the elements. Channels can be placed in a spiral right direction. 1 hp f-ly, 5 ill. fe

Description

The invention relates to the field of mining, to means for drilling with coring and preservation of the natural environment.

The aim of the invention is to increase reliability.

Figure 1 shows the core tube, a longitudinal section; figure 2 - section aa in figure 1; on fig.Z - section BB in figure 1; 4 shows a core-borne pipe with external helical channels; figure 5 - sn d when entering the core in the cavity of the core tube, a fragment.

The core projectile contains an outer casing 1 with a rock-destroying tool 2. In the casing 1 on the bearing 3 there is an internal core-receiving tube 4 having external channels 5. communicating at the inlet 6 and at the outlet 7 with its cavity filled with an anti-friction insulating substance 8. The core receiver 4 with a bearing 3, a head 9 with channels 10 and a filling plug 11. The cavity of the core-receiving tube 4 closes the bottom of the cavity of the movable piston 12. having a rod 13 protruding below the edge of the rock-breaking tool, and sealing elements 14 and 15 located on the side surface with an interstice between them. Exit 7 is located in the zone mated to the side surface of the piston 12 between the elements 14 and 15. The piston 12 is made with a cavity 16 isolated from the external environment destroyed by the diaphragm 17. At the lower end of the core receiver 4 there is a core 18. piston 12 from falling out. At the end of the rod 13 may be elastic p ha 19. Sealing elec

01 vj About

and with

The arm 14 has the possibility of longitudinal displacement, for which a groove is provided on the side surface of the piston.

To provide bearing assembly

Puts on the slotted ring.

The channels can be made screw with the right direction of the spiral.

The columnar works as follows.

A piston 12 with a diaphragm 17 above the cavity 16 is installed in the core-receiving tube 4 above the core gauge 18, abutting with the sealing element 14 and thus overlapping the cavity of the core-receiving tube 4 from below. Element 15 overlaps the cavity of the pipe 4 below output 7, closing the channels 5.

Through tube 11 core tube

4 is filled with an antifriction insulating substance (tall oil, CMC. Diesel fuel solution, etc.), closes and is installed in the housing 1 on the bearing 3. The channels 5 thus serve as centralizers of the core receiver. The coring tube thus assembled is lowered into the well on the drill string. In this case, the end of the rod 13 of the protrusion-, t below the edge of the rock of the crumbling

 of the argument 2.

During the descent process, the piston 12 with elements 14 and 15 protects the substance in the core tube 4 from contamination by the drilling fluid in the well. When setting the projectile to the bottom, the end of the rod 13 moves the piston 12 into the cavity of the core-receiver tube. Element 14, abutting against the bead, is displaced into the groove, and the excess of the tube 4 that has overflowed the cavity and the channels 5 of the substance violates the diaphragm 17, allowing the piston 12 to move freely into the cavity of the core receiver 4.

The insulating substance flows through the annular channel between the piston 12 and the walls of the core-receiver pipe 4 flows under the piston 12, enveloping the core and facilitating its entry into the cavity of the pipe 4. The core faces the end of the rod 13, moving the piston 12 further into the pipe. The shear force of the piston 12 is minimal due to the increased by the external channels 5 area of the flow of the substance, which is fed directly to the bottom and bottom of the core.

In this case, neither the distortions of the piston 12, nor

particles of the destroyed core do not interfere with the flow of the insulating substance, and the annular groove between the core 18 and the core receiver 4, where the outlet is open

7, promotes a uniform distribution of the substance around the core and prevents the core from being exposed to a jet of a flowing substance, which contributes to increasing the reliability of core insulation.

Claims (2)

1. A column shell containing an outer casing with a rock-destroying tool, an inner core tube with external channels communicating at the inlet and outlet from its cavity filled with an antifriction insulating substance, and the cavity covering the cavity of the receiving tube from the bottom below the rim rock cutting tools, different in that. that, in order to increase reliability, the piston is made with a cavity insulated from the external environment by a destructive diaphragm, and with two sealing elements located on the side surface with an interval between them, while the output from the outer channels is placed in the zone adjacent to the interval of the side surface piston between sealing elements. 2. A hose according to claim 1, characterized in that the outer channels are placed on the outer surface in a spiral of the right directions. 9 FIG. / Figz Fy FIG. five