Multi-stage cyclone desanding device

Abstract

The invention discloses a multi-stage cyclone desanding device which comprises a first-stage desanding system, at least two or more second-stage desanding systems which are arranged on the side of thefirst-stage desanding system and are communicated with the first-stage desanding system, and a first cyclone and a second cyclone passing the first-stage desanding system and the second-stage desanding systems, and corresponding filter screens, filter cylinders, so that multi-stage cyclone filtering and desanding are carried out on shale gas entering the device, and cyclone and filtering multi-stage desanding is achieved through the inner-in and outer-out desanding principle of the first-stage desanding system and the outer-in and inner-out desanding principle of the second-stage desanding system. The first-stage desanding system and the second-stage desanding system are respectively designed into a multi-stage desanding combination by virtue of the structural design of the first cycloneand the second cyclone, so that the desanding effect is good, the desanding precision is high, in addition, the first-stage desanding system corresponds to a plurality of second-stage desanding systems, and the filter screen is replaced or cleaned without closing a well, so that the gas yield is greatly improved; meanwhile, the whole device is convenient to disassemble and assemble.

Description

technical field [0001] The invention relates to a shale gas wellhead swirl filter sand removal device, in particular to a multi-stage swirl sand removal device, which belongs to the technical field of shale gas gas recovery devices. Background technique [0002] Shale gas wellhead sand removal is used as wellhead fracturing sand removal equipment to ensure that the station equipment is not eroded by gas sand particles during gas transmission. It is used as a supporting tool for oil (gas) trees or wellhead throttling devices to remove wellbore during fracturing. The fracturing sand and other impurities can be adjusted, and the functions of sand discharge and filtration can be adjusted. [0003] According to the channel mode, the desander can be divided into two types: straight-through type and side-through type. According to the shape of the filter, it can be divided into two types: direct filtration and filter sand discharge. Among the currently commonly used desanders, the...

AI Technical Summary

Problems solved by technology

Among the currently commonly used desanders, the filter structure is simple, bulky, and the overall sand removal effect is not good. At the same time, the operation is complicated, and the filter is prone to clogging, which affects the use effect of the entire desander, and it is inconvenient to disassemble. Frequent filter replacement

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