Downhole cyclone desander

A swirl de-sanding and helical blade technology, applied in the fields of production fluid, wellbore/well components, earth-moving drilling, etc., can solve the problems of sediment inhalation and pump sticking, and achieve the effect of preventing pump sticking

Inactive Publication Date: 2017-09-01
YANCHENG HUAYI GASOLINEEUM MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the usual downhole cyclone desander is swirling, the outer layer of sediment slides to the bottom of the desander due to neutrality,

Method used

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  • Downhole cyclone desander
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Embodiment Construction

[0007] In order to facilitate the understanding of those skilled in the art, the present invention will be described in detail below in conjunction with the accompanying drawings.

[0008] Such as figure 1 A downhole cyclone desander shown specifically includes an outer pipe 1 , an inner pipe 2 and a filter screen 3 . The outer tube is provided with an oil inlet hole 1-1, the outer wall of the inner tube is provided with a spiral blade 2-1, and the lower part of the inner tube is a reduced-diameter oil suction port 2-2, such as figure 2 As shown, the outer ring of the filter screen is a coarse mesh 3-1, and the inner ring of the filter screen is a fine mesh 3-2. When swirling, the larger particles of sand stick to the inner wall of the outer pipe on the outer layer, the smaller particles of sand are in the middle, and the oil is attached to the outer wall of the inner pipe to rotate. Different pore sizes of the filter screen can block the sand of different particle sizes, ac...

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Abstract

The invention discloses a downhole cyclone desander, the structure of which is divided into inner and outer pipes, the outer pipe is provided with an oil inlet hole, the outer wall of the inner pipe is provided with spiral leaves, and the lower part of the inner pipe is reduced in diameter as an oil suction port. A filter screen is arranged between the inner pipe and the outer pipe. Since the silt with larger particles is on the outside during swirling flow, the outer ring of the filter screen is a coarse-aperture net, and the inner ring of the filter screen is a fine-aperture net. The beneficial effect of the invention is that the mud and sand can be effectively separated from the oil, and a filter screen is arranged between the inner and outer pipes to prevent the mud and sand from being sucked in and causing the pump to be stuck during oil pumping.

Description

technical field [0001] The invention belongs to the field of oil drilling equipment, and in particular relates to a downhole cyclone desander. Background technique [0002] In the process of oil production, formation sand is one of the main causes of pump jamming. The main method to solve this problem is usually to install a cyclone desander on the oil well pipe. The main principle of this device is to generate centrifugal force when swirling. The heavier silt is thrown to the outer layer, and the lighter petroleum slurry is left in the inner layer, thereby separating the silt and petroleum slurry. When the usual downhole cyclone desander is swirling, the outer layer of sediment slides to the bottom of the desander due to neutrality, but is not separated from the oil slurry, which will cause some sediment to be sucked in when pumping oil, causing jams pump phenomenon. Contents of the invention [0003] In order to solve the problems existing in the prior art, the present...

Claims

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Application Information

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IPC IPC(8): E21B43/38
CPCE21B43/38
Inventor 卞鼎旺查翠红
Owner YANCHENG HUAYI GASOLINEEUM MACHINERY
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