一种地浸采铀钻井套管中心定位器

Abstract

本申请提供了一种地浸采铀钻井套管中心定位器，包括第一半壳体、第二半壳体及锁紧件，所述第一半壳体以及所述第二半壳体两端均设置有向外凸出的对开式外螺纹套，所述第一半壳体与所述第二半壳体沿轴线扣合形成外轮廓呈胶囊型的结构，所述锁紧件螺接在所述对开式外螺纹套上，以固定所述第一半壳体和所述第二半壳体。通过第一半壳体与第二半壳体的组合结构，可针对每一根地浸采铀钻井套管进行单独定位，第一半壳体和第二半壳体扣合后形成外轮廓呈胶囊型的结构，其整体外轮廓与钻孔内径适配，能稳定将套管固定在钻井中心位置，避免套管因偏移与井壁碰撞，从根本上解决常规安装中套管易破损的问题，显著提升成井质量。

Claims

1. An in-situ leaching uranium drilling well casing central positioner, characterized in that, The device includes a first half-shell (1), a second half-shell (2), and a locking member (4). Both ends of the first half-shell (1) and the second half-shell (2) are provided with outwardly protruding split external threaded sleeves (3). The first half-shell (1) and the second half-shell (2) are fastened together along the axis to form a capsule-shaped structure with an outer contour. The locking member (4) is screwed onto the split external threaded sleeves (3) to fix the first half-shell (1) and the second half-shell (2).

2. A well bore casing centraliser for use in the in-situ leaching of uranium as claimed in claim 1 wherein, The inner wall of the split external threaded sleeve (3) is provided with multiple ribs (5).

3. A well bore casing centraliser for use in the in-situ leaching of uranium as claimed in claim 2 wherein, Multiple ribs (5) are arranged in a ring array on the inner wall of the split external threaded sleeve (3).

4. A well bore casing centraliser for use in the in-situ leaching of uranium as claimed in claim 2 wherein, The height of the rib (5) is 3mm to 5mm.

5. A wellbore casing centralizer for use in the in-situ leaching of uranium as claimed in claim 1 wherein, The split external threaded sleeve (3) and the first half-shell (1), as well as the split external threaded sleeve (3) and the second half-shell (2), are all made using an integral molding process.

6. A wellbore casing centraliser for use in the drilling of in-situ leaching uranium mines as claimed in claim 1 wherein, The end of the split external threaded sleeve (3) is provided with a tapered guide surface for guiding the locking member (4) to screw in.

7. A well bore casing centraliser for use in the in-situ leaching of uranium as claimed in claim 1 wherein, The first half-shell (1) is provided with a first positioning flange and / or a first positioning groove on its fastening surface, and the second half-shell (2) is provided with a second positioning flange and / or a second positioning groove on its fastening surface. The first positioning flange is inserted into the second positioning groove or the second positioning flange is inserted into the first positioning groove so that the first half-shell (1) and the second half-shell (2) are fastened together.

8. A wellbore casing centraliser for use in the in-situ leaching of uranium according to claim 1 wherein, The inner diameter of the split external threaded sleeve (3) after being engaged is equal to the inner diameter of the first half-shell (1) and the second half-shell (2) after being engaged.

9. A wellbore casing centraliser for use in the in-situ leaching of uranium according to any one of claims 1 to 8, characterised in that, The first half-shell (1), the second half-shell (2), and the split external threaded sleeve (3) are all made of stainless steel.

10. A wellbore casing centraliser for use in the in-situ leaching of uranium according to any one of claims 1 to 8, characterised in that, The outer surfaces of the first half-shell (1) and the second half-shell (2) are coated with a corrosion-resistant coating by a spraying process.

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