On-line sand removal apparatus for oil-gas pipelines

Abstract

The invention discloses an on-line sand removal apparatus for oil-gas pipelines, which is applied in the field of petrochemical engineering. The on-line sand removal apparatus mainly includes a spiral separation section, a cyclone sand-separation section, a flow recovery section and a sand storage chamber. The spiral separation section includes a spiral inlet end surface, axially-symmetrical double spiral pipes and a spiral outlet; the cyclone sand-separation section is located at the downstream of the spiral separation section; the spiral outlet of the spiral separation section is inserted in the cyclone sand-separation section; a sand discharge hole is arranged below the cyclone sand-separation section; the sand storage chamber is installed under the sand discharge hole; and the flow recovery section is arranged at the end of the sand removal apparatus. Through combination of spiral separation and cyclone separation, the sand removal apparatus is high in separation efficiency and is suitable for oil transportation, gas transportation or oil-gas mixed transportation pipelines. There is no filter component in the structure, so that a problem of blocking in the sand remover can be solved once for all; the sand removal apparatus can be installed in the same way as a common valve vertically or horizontally without occupation of extra spaces and application of assistant facilities.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and in particular relates to an online desanding device for oil and gas pipelines. Background technique [0002] In the process of oil and gas extraction, it is inevitable that there will be solid impurities such as mud and sand, especially with the application of new technologies such as hydraulic fracturing and polymer flooding, this phenomenon has become increasingly serious. The existence of solid impurities will adversely affect the normal operation of downstream oil and gas treatment facilities such as three-phase separators, and cause strong wear and tear on the inner anti-corrosion layer on the inner wall of the pipeline. The normal operation of pumps and compressors in power facilities is highly sensitive to solid impurities. Advanced solid-liquid and gas-solid separation facilities are of great significance. [0003] At present, the main methods for separating solid impurities inc...

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Problems solved by technology

[0004] There are precedents for related devices using spiral structures for desandering. Chinese patent CN96118733.6 discloses a crude oil wellhead pipe flow desander; Chinese patent CN201410815080.6 discloses a spiral desander; these two patents disclose Although the desander made use of the swirling field of the spiral tube to separate the solid impurities, the structure of the device is too rough, the form is not reasonable enough, and the installation is too complicated

Especially in the sand separation section, the form of opening holes on the spiral pipe is adopted. Firstly, the number of openings in this way is greatly limited, and secondly, the position of the openings also has a great influence on the separation of sand, and the separation effect is serious. in doubt

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