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A method of using ultra-high power ultrasonic to remove plugging and increase permeability

An ultrasonic and plug-removing technology, which is applied in earthwork drilling, wellbore/well components, vibration generating devices, etc., to achieve the effects of increasing production, increasing actual production volume, and improving overall recovery rate

Active Publication Date: 2021-04-20
哈尔滨龙声超声技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the operating wells in in-situ leaching mines are completely different from the strata where the oil wells are located in terms of pressure, connection state and environment, as well as substances that cause chemical plugging. The existing ultrasonic plugging removal and injection enhancement methods are only applicable to oil exploration and other projects.

Method used

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  • A method of using ultra-high power ultrasonic to remove plugging and increase permeability
  • A method of using ultra-high power ultrasonic to remove plugging and increase permeability
  • A method of using ultra-high power ultrasonic to remove plugging and increase permeability

Examples

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Embodiment 1

[0062] A sandstone-type uranium deposit (C3 mining area) with a relatively large uranium resource reserve but a relatively low leaching recovery rate was selected, and two groups of units (test units) were selected in the C3 mining area to carry out the experiment of super-high-power ultrasonic plugging removal and permeability enhancement (abbreviated Ultrasonic Well Washing Test or Ultrasonic Test).

[0063] In this embodiment, adjacent two groups of pumping units are selected, including 2 liquid pumping holes, 7 liquid injection holes, and a total of 9 boreholes (in the present invention, the liquid pumping holes and liquid injection holes are collectively referred to as drill holes), The plane distribution of the 9 boreholes is as follows figure 1 shown.

[0064] In this embodiment, from December 10, 2017 to December 14, ultrasonic transducers with 3 different frequencies (from high to low) were used to generate ultrasonic waves so as to deblock and increase the permeabil...

Embodiment 2

[0068]On the basis of Example 1, the two pumping holes (KC2306, KC2704) and the surrounding monitoring holes in Example 1 were sampled and analyzed for more than 20 days. After the operation, the metal concentration change situation (as shown in Table 3) and the residual acid concentration change situation (as shown in Table 4) of the leachate and the residual acid concentration change situation (as shown in Table 4) of the leaching solution in the 2 pumping holes in embodiment 1 and the peripheral monitoring holes when the pumping operation is carried out Show).

[0069] It can be seen from Table 3 and Table 4 that the data of the two pumping holes KC2306 and KC2704 fluctuated greatly in a short period of time after the pumping operation resumed. The connectivity between liquid pores is different, and the degree of diffusion of residual acid in different directions of the ore layer is different, resulting in large data fluctuations within a period of time after recovery. Aft...

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Abstract

The invention relates to a method for removing plugging and increasing permeability by using ultra-high-power ultrasonic waves. The method comprises the steps of: (1) determining a plurality of target positions uniformly spaced along the height direction of the filter in the filter of the in-situ leaching uranium mining borehole; (2) adopting two target positions for each target position The ultrasonic transducers with different frequencies above generate ultrasonic waves to perform the blockage removal and permeation enhancement operation for 60-100 minutes each; wherein, the power of the ultrasonic transducers is 5-30 kW. The method of the invention can significantly remove the blockage and increase the permeability of the borehole of the in-situ leaching mine and the uranium reservoir around the borehole, and improve the permeability and connectivity of the formation of the in-situ leaching mine; The output of the liquid injection hole and the liquid suction hole is significantly improved, thereby significantly increasing the actual uranium recovery of the in-situ leaching mine.

Description

technical field [0001] The invention belongs to the technical field of uranium mining by in-situ leaching, and in particular relates to a method for removing plugging and increasing permeability by using ultra-high-power ultrasonic waves. Background technique [0002] In-situ leaching uranium mining in in-situ leaching mines is a kind of integrated mining and smelting that selectively dissolves uranium in ores through chemical reactions between leaching reagents and minerals under natural burial conditions without causing displacement of ores. According to different leaching reagents, people have long been used to divide the in-situ leaching process into two categories: acid method and alkali method. In-situ leaching uranium mining has advantages that conventional mining cannot match, such as low cost, short mining period, and environmental friendliness. Since the 21st century, the share of in-situ leaching uranium mining in the world's total natural uranium production has i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B37/00E21B28/00
CPCE21B28/00E21B37/00
Inventor 赵骁赵树山
Owner 哈尔滨龙声超声技术有限公司