SU262801A1 - DEVICE FOR UNDERGROUND LEAKAGE OF SOLUBLE MOUNTAIN BREEDS - Google Patents

Description

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Devices for the underground leaching of soluble rock breeds are known, including concentrically arranged columns of pipes for feeding the solvent and withdrawing the solution.

The proposed device is characterized in that the shank of the solvent supply column is equipped with a turbo-hammer, on a rotating shaft of which there is a hollow cylinder with outlet slots, periodically coinciding with the slots on the side surface of the fixed-body turbo-hammer. This causes a pulsating supply of liquid to the dissolution zone with removal of the solution through the hollow shaft of the mover and provides for the sensitization of the in-situ leaching.

The drawing shows schematically the described device in section.

A borehole designed to dissolve rocks is surrounded with a column I, cemented to the mouth, and then coloin 2 is fed into it to supply liquid reagent and column 5 to raise the brine. The casing colo shoe 1 is lowered below the roof of the eroded rock, which provides greater sealing of the well. The system of columns 2 and 5 provides. As the flow of liquid reagent into the well, and the removal of solid matter to the surface,

In the initial scouring period, when the contact surface is limited, the flow rate of the liquid reactant significantly exceeds the rate required to obtain a saturated solution as a result of molecular diffusion. As a consequence, an unsaturated solution is carried to the surface (80-120 g / .4 at a saturation concentration of 310 g / l).

A change in the process technology, i.e., a decrease in the amount of the supplied liquid reagent in accordance with the saturation rate causes a significant lengthening of the time required for the formation of chambers.

The present invention is directed to the acceleration of underground dissolution of rocks throughout the entire formation of the active contact surface. This is achieved by the fact that the liquid reagent flowing around the dissolution surface at the interface is microturbuled as a result of the oscillatory speeds and excessive pressures created by an oscillating device placed inside the dissolution zone.

As a device that creates low-frequency elastic oscillations in the dissolving tank, leading to liquid displacement at the liquid-solid interface, use is made of a modernized turbo-hammer.

for drilling oil and gas wells. The energy required to operate the turbodolder is supplied by a stream of washing fluid supplied by surface mounted pumps through drill pipes. The working fluid entering the turbodolt passes into the turbine, where the hydraulic energy of the fluid flow is converted into mechanical energy of rotation of the shaft connected to the bit, which produces useful work. Turbodoloto has a multistage axial-type turbine. Each turbine stage consists of a stationary and rotating disks of the stator and rotor, of which the first is connected to the turbo-hammer body, and the second rotates with the shaft.

To create a dissolving overpressure and oscillating speeds inside the tank, the shank of the column feeding the solvent is equipped with a turbo hammer 4, on the rotating shaft of which there is a hollow cylinder 5 with discharge slots. The periodic coincidence of these slots with the slit holes 6 cut through on the fixed body of the turbo-hammer causes a pulsed supply of liquid to the dissolution zone. The number of slotted slots on the internal MOVING cylinder, you can 1regulate the frequency of pulsations and their strength.

Typically, the turbo-chill is mounted on a string of pipes that supplies the flushing fluid to the well. Since, when creating the dissolving tank, the solvent flows through the space between columns 2 and it becomes necessary to provide a flow of solutions through the turbo-hammer body.

The upper part of the upgraded turbodolder is connected by a transition sleeve 7 to the solution supply column 2. For coupling the rotating shaft 8 with the non-rotating column 3 A shaped flange 9 is used, in the body of which there are slots for the solvent to pass between the columns 2 and 5. In the upper conical part of the flange rubber glands 10 for tightness of the articulation. columns 3 with a flange. The lower part of the flange is connected to the rotating shaft 8 by a slip stitch head 11.

A coupling 12 is installed in the lower part of the turbodolder for articulating it with the shank of the stationary solution-soluble column 3 with a length of about 10 m. The rotating shaft is connected to the coupling with the HELP of the sleeve 13, which plays the role of a slide bearing.

Thus, the solvent, entering through the annular space of columns 2 and 5 through the slots in the flange 9, passes through the propulsion unit of the turbo hammer 4 and pulsator B is supplied.

The resulting solution through the shank of the column 3, the hollow shaft 8 of the turbodolder and the column 3 is carried to the surface.

Subject invention

A device for underground leaching of soluble rocks, comprising concentrically arranged columns of pipe for supplying solvent and sampling solution, placed in a borehole, characterized in that, in order to intensify a subterranean leaching process, the solution feed shaft is equipped with a turbo hammer on a rotating shaft. which has a hollow cylinder with outlet slots, periodically coinciding with the slots on the side surface of the fixed body of the turbo-hammer.