A drilling structure construction method that can increase the amount of uranium pumping and injection in ground leaching

An in-situ leaching uranium mining and construction method technology, which is applied to drilling equipment and methods, drill pipes, drill pipes, etc., can solve the problems of high labor intensity for well cleaning, low drilling well completion rate, and poor sediment resistance, and achieve Low labor intensity for well washing, high drilling rate and low cost

Active Publication Date: 2019-08-13
中核通辽铀业有限责任公司
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Problems solved by technology

The large-aperture gravel-fill drilling structure has the following disadvantages in the construction and well completion process: 1) Long construction period; 2) Poor anti-sediment performance; 3) Low drilling well completion rate; 4) High labor intensity for well cleaning; 5) High cost; 6) Poor construction quality

Method used

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  • A drilling structure construction method that can increase the amount of uranium pumping and injection in ground leaching
  • A drilling structure construction method that can increase the amount of uranium pumping and injection in ground leaching
  • A drilling structure construction method that can increase the amount of uranium pumping and injection in ground leaching

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] like Figure 1-2 A drilling structure construction method that can increase the amount of injection liquid for uranium extraction by in-situ leaching is shown, comprising the following steps:

[0034] (a) Carry out drilling of open hole 2, installation of casing 1 and grouting and cementing 3, wherein the drilling diameter of open hole 2 is 150-220 mm, and the drilling depth of open hole 2 is from the surface to the bottom of the sedimentation pipe;

[0035] (b) A casing protection device is installed on the drill pipe to limit the position of the drill pipe so that it is centered during the drilling of the drill bit to reduce casing wear; the casing protection device is a hollow tubular structure made of nylon , the inner diameter of the casing protection device matches the outer diameter of the drill pipe, the wall thickness...

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Abstract

The invention relates to the field of uranium leaching technology, and specifically discloses a drilling structure construction method capable of increasing the amount of in-situ uranium leaching extraction and injection fluid. The steps comprises the steps that (a) open-hole drilling, sleeve installation and grouting and well cementing are carried out; (b) a sleeve protection device is installedon a drill pipe; (c) a secondary in-pipe drilling drill bit is lowered after fresh drilling fluid is prepared; (d) an ore-containing section is subjected to secondary in-pipe drilling; (e) punching bywater is carried out; and (f) a filtering device is lowered. The method has short construction period, good sediment prevention, high drilling well-completion rate, low well-washing labor intensity,low cost and high construction quality, and the quality improvement, efficiency enhancement and consumption reduction of drilling construction are achieved.

Description

technical field [0001] The invention belongs to the field of uranium leaching technology, and in particular relates to a drilling structure construction method capable of increasing the pumping and injection liquid volume for uranium mining in ground leaching. Background technique [0002] In-situ leaching technology drilling is the only channel for leaching agent to enter the sandstone uranium deposit and leachate is lifted to the surface. It controls the distribution and migration of the injected leaching agent in the ore-bearing aquifer and determines whether the leaching agent can fully It reacts with uranium minerals in the ore seam, the degree of dilution of the leaching solution by groundwater, and whether the groundwater environment causes pollution and the degree of pollution. At the same time, the construction cost and quality of in-situ leaching drilling largely determine the technical and economic feasibility, rationality and effectiveness of in-situ leaching min...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/00E21B17/10E21B43/10E21B21/00E21B33/13
CPCE21B7/00E21B17/10E21B21/00E21B33/13E21B43/10
Inventor 苏学斌张勇汤庆四原渊李喜龙张渤高险峰董慧琦甘泉马连春季扬威闫纪帆
Owner 中核通辽铀业有限责任公司
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