Novel anti-puncture guide shell for electric submersible pump

Abstract

The utility model discloses a novel anti-puncture guide shell for submersible electric pump, and the anti-puncture guide shell comprises a guide shell body provided with a central hole, wherein: the outer wall of the guide shell body is not provided with a sealing groove. Due to the progress of the assembly process of the submersible electric pump, the sealing groove in the outer wall of the guide shell body is no longer provided with a sealing ring. However, in the current environment of high water content and high sand content of oil well production liquid, the risk of puncture of the guide shell provided with the sealing groove is further increased. The utility model cancels the sealing groove in the outer wall of the guide shell body, significantly enhances the strength and the ability of resisting sand particle impact of the guide shell at the position, can greatly improve the service life of the guide shell, prolongs the maintenance cycle of the submersible electric pump, reduces the failure risk and loss caused by the puncture of the guide shell, has good use effect and can improve the economic benefit of the submersible electric pump well.

Claims

1. A novel anti-puncture and leak-proof guide housing for a submersible electric pump, comprising a guide housing body with a central hole, characterized in that, The outer wall of the guide shell body is not provided with a sealing groove; the upper shell cavity in the guide shell body is a conical cavity that is larger at the top and smaller at the bottom; both the inner and outer surfaces of the guide shell body are nitrided and a nitrided layer is formed.

2. The novel anti-puncture and leak-proof guide housing for a submersible electric pump as described in claim 1, characterized in that, The top wall thickness of the upper shell cavity is 4.0mm ± 0.3mm and the bottom wall thickness is 6.0mm ± 0.3mm, and the ratio of the top wall thickness to the bottom wall thickness of the upper shell cavity is 1:1.

5.

3. A novel anti-puncture and leak-proof guide housing for a submersible electric pump as described in claim 2, characterized in that... The lower end of the upper shell cavity is provided with a thickened cavity bottom, the axial height of which is 6mm±0.2mm and the radial thickness is 3mm±0.1mm.

4. The novel anti-puncture and leak-proof guide housing for a submersible electric pump as described in claim 3, characterized in that, Three or more reinforcing ribs are also provided on the inner side of the lower end of the thickened cavity bottom.

5. A novel anti-puncture and leak-proof guide housing for a submersible electric pump as described in claim 4, characterized in that, The reinforcing ribs are provided in four sections. Each reinforcing rib is a narrow strip with a radial length of 10.0 mm ± 0.1 mm and a circumferential width of 4 mm. The groove formed by two adjacent reinforcing ribs has a depth of 1.0 mm ± 0.1 mm and a surface roughness Ra ≤ 6.3 μm.

6. A novel anti-puncture and leak-proof guide housing for a submersible electric pump as described in any one of claims 1-5, characterized in that, The guide shell body is made of low alloy steel of 14 nickel cast iron No.

1.

7. A novel anti-puncture and leak-proof guide housing for a submersible electric pump as described in claim 6, characterized in that, The guide shell body is integrally cast from low-alloy steel of 14 nickel cast iron No. 1.

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