Downhole oil-water separation device with multistage hydrocyclones in parallel

Abstract

A downhole oil-water separation device with multistage hydrocyclones in parallel is applicable to a downhole oil-water separation system of a Y-shaped tubular column structure. The downhole oil-water separation device with the multistage hydrocyclones in parallel is provided with a multistage parallel-connected hydrocyclone unit. The quantity of the hydrocyclones can be adjusted according to a practical application situation. Each hydrocyclone is arranged in a tank body along the direction parallel to an axis and is located through a positioning plate, a compact disc, a support disc, an anti-rotation disc and the like. An inlet of the parallel-connected hydrocyclone unit, an overflow flow channel and an underflow flow channel are formed. Each hydrocyclone is compact in structure and easy to install. An electric pump unit and a lifting oil pipe are connected with the upper portion of a three-way piece of the Y-shaped tubular column and the electric pump unit and the lifting oil pipe are connected in a parallel mode. The lower portion of the three-way piece of the Y-shaped tubular column is connected with a cross flow channel body of the downhole oil-water separation device with the multistage hydrocyclones in parallel. The flow channels in the cross flow channel body are respectively communicated with an original oil flow channel and an overflow flow channel of the three-way piece. The multistage hydrocyclones in parallel can be adapted to higher liquid production volume, has higher separation efficiency under the higher liquid production volume, and is applicable to downhole oil-water separation of oil wells with big casing size and the high liquid production volume at sea or land.

Description

technical field [0001] The invention relates to a downhole oil-water separation device, in particular to a downhole oil-water separation device which can be configured with multi-stage parallel hydrocyclones. Background technique [0002] With the development of downhole oil-water separation technology, separation efficiency and processing capacity have become important factors limiting the development of this technology. The separation efficiency and processing capacity of the downhole oil-water separation system are related to the performance of its core component, the downhole hydrocyclone. The traditional downhole oil-water separation system is equipped with a single-stage or multi-stage series downhole hydrocyclone, which can be used to a certain extent. Meet the separation efficiency requirements. However, for oil wells with high liquid production in land or offshore oil fields, the insufficient processing capacity of single-stage or multi-stage series hydrocyclones h...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of low processing flow and poor separation efficiency of single-stage or multi-stage series downhole hydrocyclones, the present invention provides a new type of downhole oil-water separation device

The device is equipped with multiple small-diameter hydrocyclones connected in parallel, which can not only improve the processing capacity of the downhole oil-water separation system, but also solve the problem of poor separation efficiency

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