Multi-cavity circulating collaborative desanding system and method for shale gas collection

By using a multi-cavity circulating and coordinated sand removal system, which utilizes air pressure drive and sand particle gravity alternating circulation processing, the problem of unstable sand removal in shale gas extraction has been solved, and effective removal of sand particles of various sizes and stable gas transportation have been achieved.

CN122098146BActive Publication Date: 2026-07-07LESHAN CHUANTIAN GAS EQUIP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LESHAN CHUANTIAN GAS EQUIP
Filing Date
2026-04-24
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing technologies cannot reliably and continuously remove sand particles of various sizes during shale gas extraction, leading to pressure fluctuations and equipment damage during transportation.

Method used

A multi-chamber circulating collaborative sand removal system is adopted. By setting at least two coaxial chambers and a sand scraping structure, it uses air pressure to achieve staggered circulation of air intake, exhalation, sand settling and sand discharge. The sand particles are deposited and discharged by their own gravity, ensuring the continuity and stability of gas delivery.

Benefits of technology

It effectively removes sand particles of various sizes, ensures stable pressure in shale gas pipelines, avoids equipment damage, and enables continuous and uninterrupted gas delivery.

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Abstract

The application discloses a shale gas collection multi-cavity circulation collaborative sand removing system and method, relates to the technical field of shale gas exploitation, and can solve the problem that current shale gas cannot be continuously and stably removed from multi-particle-size sand grains. The shale gas collection multi-cavity circulation collaborative sand removing system comprises a main air inlet pipe, a main air outlet pipe and a sand removing mechanism. The sand removing mechanism comprises two cavities and a sand scraping structure. The sand scraping structure is slidably arranged through the adjacent ends of the two cavities, and the two ends of the sand scraping structure are slidably and sealingly connected to the two cavities. When one end of the sand scraping structure is located at the adjacent end of one cavity, the other end is located at the far end of the other cavity, and the sand scraping structure is driven by the air pressure in the main air inlet pipe. At least one sand removing mechanism is in an air suction treatment phase and an air exhalation treatment phase, at least one sand removing mechanism is in a sand sinking treatment phase and a sand discharging treatment phase, and any cavity sequentially and circularly executes the air suction treatment phase, the sand sinking treatment phase, the air exhalation treatment phase and the sand discharging treatment phase.
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Citation Information

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