SU1550086A1 - Detachable core receptacle - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to mining and is intended for core drilling. The goal is to increase the reliability of work. For this, in the drainage channel 4 a piston 26 spring-loaded above is placed with a rod 20, movable relative to the outlet port 5. The rod 20 has an overflow channel 23. The core receiver has a jet pump made in the form of a longitudinal movable unit 14 with a tapered casing 15 and with the housing 16. The latter is connected to the gripping head 19 and to the stem 20. A check valve 22 is installed in the overflow channel 23. The supporting part 8 is made with an internal conical bell 9, mesh valves 10 are located above the latter, hinged with union of him. The housing 16 has rods 25 for engaging with the valves 10 in longitudinal movement. The jet pump from the bottom side is spring-loaded with respect to part 8. When a vacuum is created in the pump, liquid from the cavity of the core receiver tube flows through the rod 20, opening the valve 22. The upward movement of the flush liquid flow in the cavity of the core receiver tube improves the conditions for the core to enter and his exit. 2 hp f-ly, 3 ill.

Description

FIELD OF THE INVENTION The invention relates to mining, to means for drilling with coring and removing it without lifting drill pipes.

The purpose of the invention is to increase the reliability of work.

Figure 1 shows a removable core-receiver, a longitudinal section; 2 is the same in the process of lowering FIG. 3 shows the layout of the removable core of the receiver in the core. The removable core receiver contains a core receiver pipe 1 with a core holder 2 and an adapter 3 having a drain channel 4 with an outlet 5. At the opening 5, an annular valve 6 is installed on the outer side. Adapter 3 is connected through a sleeve 7 an internal conical socket 9, over which spring-loaded mesh valves 10 are installed and pivoted, supported on a centering sleeve 11 with windows 12. A reflective visor 13 is installed under the sleeve 11.

Inside the support part 8 there is a jet pump made in the form of a longitudinally movable unit 14 with a conical casing 15 and a housing 16 having confusors with diffusers 17 and a block of nozzles 18. The housing 16 is connected to a gripping head 19 and to the stem 20 through a protrusion 21, which is the seat of the check valve 22 installed in the overflow channel 23 of the rod 20. In the lower part of the housing 16, the outlets from the diffusers 17 are blocked by elastic valves 24. In the upper part, the housing 1b has rods 25 for interacting with the valves 10 during longitudinal movement

The rod 20 at the lower end has a piston 26, spring-loaded with a spring 27 on top and having mobility relative to the outlet 5. The spring 28, installed on the lower side of the jet pump and spring-loaded against the support part 8, has a stiffness less than the spring rigidity 27, whose compression force is less than the weight core tube. The connection of the support part 8 with the gripping head 19 is carried out through a jet pump, and with the core receiver tube 1 through an adapter 3 and a bearing assembly 29 "

Removable core receiver works as follows.

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The assembled core receiver (FIG. 1) is lowered onto the rope into the cavity of the drill pipe, filled with flushing fluid. In this case, under the weight of the core tube 1, the gripping head 19, together with the jet pump enclosed in the casing 15, moves in the bell 9 to the extreme upper position, opening the annular space between the bell 9 and the casing 15 to allow the flushing fluid to flow freely. The mesh valves 10 rotate around the hinges, forming stabilizers and not interfering with the flow of liquid (Fig. 2), the block of nozzles 18 of the jet pump overlaps the top with a reflective visor 13 and the bottom with elastic valves 24 and does not clog during descent or ascent.

Bleeding of the flushing fluid that occurs when the core receiver moves downward in the cavity of the core receiver tube 1 is released through the hole 5, as the moving flow depresses the valve 6 and enters the annular space.

When mounting the supporting part 8 to the supporting socket of the coronary jet jet pump, the action of its own weight and force of the spring 27 moves to the lowest position, blocking the annular channel in the conical socket 9. The mesh valves 10 are shifted to the horizontal position, preventing the block of nozzles 18 from freezing (figure 1).

During drilling, the jet pump is pressurized by the flushing fluid flow pressed to the conical socket 9. The flushing fluid flow, passing through the block of nozzles 18 into the corresponding confusors and diffusers 17, depress the valves 24, falling into the expanding space between the removable core receiver and the coring block before the bottomhole, cools the chisel and carries the sludge. At the same time, a vacuum is created in the pump, where fluid flows from the cavity of the core receiver pipe 1 through the rod 20, opening valve 22. The upward movement of the flow of washing liquid in the cavity of the core receiver pipe 1 improves the conditions for the core to enter the pipe 1 and increase its output.

When lifting a core receiver filled with a core, the jet pump rises, the block of nozzles 18 overlaps with a visor 13, and the mesh valves 10 are transferred to a vertical position with rods 25 "At this, the liquid above the core receiver goes freely into the space under the core receiver, ensuring its unimpeded movement into drill pipe string.

Claims (3)

1. Removable core receiver, containing a core receiver tube with a core holder and an adapter having a drainage channel with an outlet orifice and a check valve, a support part connected to a gripping and connected bearing unit with a core receiver tube, and a jet pump, about one liter and with the fact that, in order to increase the reliability of work, it is equipped with a piston with a stem having a bypass, which is located in the drainage channel and is movable relative to the outlet opening channel, jet pump is made as a longitudinally movable unit with a conical casing and housing placed in the support part, the housing is connected to the gripping head and the stem, the check valve is installed in the bypass passage of the rod, and the supporting part is made with an internal conical socket. 2. A core receiver according to claim 1, characterized in that it is provided with mesh valves mounted above the conical socket and pivotally connected to it, wherein the body of the jet pump is made with rods for interacting with the mesh valves during longitudinal displacement 3. Core receiver according to claim 2, characterized in that the jet pump on the underside is spring-loaded relative to the support part, wherein the spring stiffness is less than the piston spring stiffness and the compression force of the piston spring is less than the weight of the core receiver. BUT