Three-in-one vertical desander and desanding process

Abstract

The invention discloses a three-in-one vertical desander and a desanding process. The desander comprises a quick opening closure and a vertical barrel, wherein a medium inlet is formed in the upper part of the vertical barrel, a medium outlet is formed in the middle, a backflush port is formed in the lower part, and a sand discharge port is formed in the bottom; a screen pipe is arranged in the vertical barrel, the upper part of the screen pipe is connected with the upper part of the vertical barrel, and the lower part of the screen pipe is connected with the medium outlet; the medium inlet adopts tangent gas inflow, a cyclone guide device is arranged at the medium inlet, a sand storing space is formed below the medium outlet, and a conical funnel is arranged below the sand storing space;an inlet differential pressure gauge is arranged at the medium inlet, and an outlet differential pressure gauge is arranged at the medium outlet. Compared with the prior art, the three-in-one verticaldesander has the positive effects as follows: desanding precision is improved, influence on normal operation of downstream equipment is reduced, time for desanding operation is determined by monitoring desanding time through differential pressure, desanding operation is convenient, and operation difficulty is reduced.

Description

technical field [0001] The invention relates to a three-in-one vertical sand remover and a sand removal process. Background technique [0002] At present, hydraulic fracturing is commonly used in shale gas exploitation. When mining, a large amount of water mixed with mud sand and a small amount of chemical substances are injected into the well. The main component of mud sand is 30-100 mesh ceramsite. The ceramsite has a large amount and high hardness. The amount of sand added to a single well is relatively large. If this part of ceramsite is not separated from the mud and sand, it will cause serious erosion to downstream equipment and pipelines and affect the safe and stable operation of the system. Therefore, effective sand removal is very important. [0003] The existing desander has a horizontal filter structure. The shale gas containing water and sand enters the desander along the medium inlet, the sand particles are deposited in the screen, and the gas, water and part o...

AI Technical Summary

Problems solved by technology

The disadvantage is that the disassembly of the screen is inevitable. During the disassembly process, because of the hard connection, the end is easily damaged, and it is difficult to ensure its sealing performance after repeated disassembly.

[0006] Second, the ceramsite used in shale gas is generally between 0.1mm and 0.5mm, and the minimum filtration diameter of the slotted screen type screen is 0.20mm, so the screen cannot separate sand and gravel with a diameter smaller than 0.20mm , low separation efficiency

[0007] Third, the filtered gravel is deposited in the screen, which will block the flow area of ​​the screen and affect the separation efficiency

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