RU2101504C1 - Lower head of hydraulic borehole mining tool - Google Patents

Abstract

FIELD: mining industry; mineral hydraulic borehole mining. SUBSTANCE: the offered lower head of hydraulic borehole mining tool has branch pipe for supply of pressure water. Branch pipe has hydraulic giant nozzles and accommodates pulp line branch pipe. Installed in annular space between above-indicated branch pipes is swirler of pulp flow. Swirler is made in form of, at least, one tangentially directed port in pulp line branch pipe hydraulically interconnected in pair to form, at least, one spiral channel for tangential introduction of swirling agent from annular space to pulp line branch pipe. EFFECT: higher efficiency. 4 dwg

Description

 The invention relates to the hydraulic industry and can be used in the development of mineral deposits by methods of downhole hydraulic production.

 Known lower head borehole hydraulic projectile containing a pipe for supplying a flow of pressure water with a hydraulic head, a pipe fitting pipe with a suction port and a nozzle of a hydraulic elevator located therein.

 The disadvantage of this device is the relatively small development depths at which it can be used effectively due to the small pressure created by the hydraulic elevator.

The closest in technical essence and the achieved result is the lower head of the borehole hydraulic production shell, including a pipe for supplying pressure water with hydraulic nozzles and a pipe fitting located in it [1]
This head, equipped with a swirl of pressure water flow, can significantly increase the depth of development, however, its use requires a large flow of pressure water, which in some cases can lead to flooding of the face and decrease, thereby reducing the efficiency of the hydraulic nozzles.

 The technical result to which this invention is directed is to reduce the flow of pressure water while maintaining or increasing the depth of development.

 The specified technical result is achieved by the fact that the well-known lower head of the downhole hydraulic production projectile, including a pipe for supplying pressure water with hydraulic nozzles and a pipe pipe located in it, is equipped with a pulp flow swirl made in the form of at least one window in the pipe of pressure water and at least at least one tangentially directed window in the pipe slurry pipe, hydraulically paired with each other with the formation of at least one spiral channel for tangential Nogo commissioning slurry pipeline swirl nozzle agent from the annulus.

 The above set includes all the essential features, each of which is necessary, and all together are sufficient to achieve the specified technical result.

 In FIG. 1 shows a longitudinal section of the lower end of a borehole production unit with an annular elevator; in FIG. 2, section A A in FIG. one; in FIG. 3 is a longitudinal section of the lower end of the borehole production unit with airlift; in FIG. 4, section A A in FIG. 3.

 The lower head consists of a nozzle 1 for supplying pressurized water, in which the hydraulic nozzles are mounted 2. Inside the nozzle 1 coaxially with a gap 3 there is a nozzle for the slurry conduit 4. The swirler 5 of the pulp stream is made in the form of at least one window 6 in the nozzle 1 for supplying pressurized water and at least one tangentially directed window 7 in the pipe nozzle 4.

 Windows 6 and 7 can be located both in the same cross section of the head, and somewhat offset relative to each other along its longitudinal axis. The number of windows 6 and 7 is determined in each case, depending on the development conditions.

 Windows 6 and 7 are hydraulically connected in pairs with each other with the formation of at least one spiral channel 8 for tangentially introducing a swirling agent from the annulus 9 into the duct pipe 4. The spiral channels 8 make it possible to create a smoother connection with the duct pipe 4 without curvature jumps, characteristic for interfacing rectilinear channels of tangential input with cylindrical nozzles.

 The device operates as follows. When pressure water is supplied to the nozzle 1 of the lower head of the borehole production unit with an annular elevator, part of the flow along the annular gap 3 enters the hydraulic nozzles 2 and erodes the mineral with the formation of pulp. The other part is fed to the ring elevator.

 After applying compressed air to the annulus 9, it lowers the water level in the production chamber and squeezes the pulp to the receiving window of the elevator. Part of the water under pressure enters the windows 6 and then through the spiral channel 8 to the windows 7 in the slurry conduit 4. Since the spiral channel 8 and the windows 7 form a tangential input, the water entering the slurry conduit 4 causes the rising pulp to spin along the longitudinal axis, thereby acquiring the highest speed.

 After the water level in the chamber drops so much that the windows 6 are exposed, compressed air will begin to break into the pulp line, which will have an effect similar to water on the pulp and, in addition, create an airlift effect.

 When supplying pressure water to the pipe 1 of the lower end of the borehole production unit with airlift, all the pressure is spent on erosion of minerals by means of hydraulic nozzles 2 with the formation of pulp. The pulp enters the receiving windows of the airlift and partially accumulates in the lower part of the mining chamber, if the airlift's productivity is less than the flow of pressure water.

 After supplying compressed air to the annulus 9, the operation of the device occurs in the sequence described above.

Claims (1)

 The lower head of the downhole hydraulic production apparatus, including a nozzle for supplying pressure water with hydraulic nozzles and a pulp pipe nozzle located in it, characterized in that it is equipped with a pulp flow swirl made in the form of at least one window in the pressure water nozzle and at least one tangentially directional window in the pulp pipe branch, hydraulically paired with each other with the formation of at least one spiral channel for tangential swirling into the pipe branch pipe yayuschego agent from the annulus.

Images