Two-stage cyclone separator

Abstract

The invention provides a two-stage cyclone separator. The separator comprises an upper outer cylinder, a sealing partition plate, an upper cyclone cover, an upper cyclone separation assembly, a reversing block, a lower outer cylinder, a lower cyclone cover and a lower cyclone separation assembly, wherein the sealing partition plate is arranged in the upper outer cylinder, and is provided with a mounting hole; the upper cyclone cover is fixed to the sealing partition plate, an upper annular cavity is formed between the upper cyclone cover and the upper outer cylinder, and the side wall of the upper cyclone cover is provided with an upper side directional liquid inlet hole; the upper cyclone separation assembly is contained in the upper cyclone cover, and comprises an upper main body piece inserted into the mounting hole, and an upper spiral sheet arranged outside the upper main body piece; the reversing block is connected to the lower end of the upper outer cylinder, and is provided with first and second reversing channels, and the lower end of the upper cyclone cover is inserted into the first reversing channel; the lower outer cylinder is connected to the lower end of the reversing block, and the side wall of the lower outer cylinder is provided with an outer side directional liquid inlet hole; the lower cyclone cover is fixed at the lower end of the reversing block and is contained in the lower outer cylinder, and the side wall of the lower cyclone cover is provided with a lower side directional liquid inlet hole; and the lower cyclone separation assembly is contained inthe lower cyclone cover, and comprises a lower main body piece inserted in the second reversing channel and a lower spiral sheet arranged outside the lower body piece. According to the embodiment of the separator, the separation effect on a high-sand-content well liquid can be improved, and the efficient production of oil recovery can be effectively realized.

Description

technical field [0001] The invention relates to the technical field of sand control devices for mining sand wells, in particular to a two-stage cyclone separator. Background technique [0002] The statements in this section only provide background information related to the present disclosure and may not constitute prior art. [0003] The oilfield mining has entered the middle and later stages, and formation sand production is common. Taking Block Shen 67 of Liaohe Oilfield as an example, there are 110 sand producing wells in this block, accounting for 89.7% of the total number of wells. The sand production of oil wells is high, mainly fine silt. For the exploitation of such high sand content well conditions, the existing downhole oil recovery devices have the following defects: [0004] 1. The special sand control pump can only alleviate the problem of sand stuck pump to a certain extent, and the seals such as plunger and pump barrel are seriously worn, which leads to the...

AI Technical Summary

Problems solved by technology

Poor solid-liquid separation due to limited helical channels

Coupled with the sand discharge method at the top, the sand lacks sufficient kinetic energy to enter the sand discharge port, resulting in the blockage of the sand discharge port of the separator and the loss of separation function

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