Trestle type downhole flow adaptive liquid-liquid separation device

Abstract

A trestle type downhole flow self-adaptive liquid-liquid separation device. The main purpose is to provide a liquid-liquid separation device, which can automatically adjust the internal mechanical structure to adapt to the change of the flow rate of incoming liquid, and complete and ensure the efficient separation of two-phase media with different densities in the device. It is characterized in that: the device includes a variable diameter joint, an inlet pipe, a ring centralizer, a trestle type flow stabilization unit, a variable diameter separation pipe, an overflow pipe and a float type voltage stabilizer connected in sequence; the internal opening of the variable diameter separation pipe There is a separation chamber composed of a cylindrical swirl chamber, a large cone chamber, a small cone chamber and a bottom flow chamber; the trestle-type steady flow unit includes a steady flow slider, a steady flow plate, a steady flow connecting rod, a steady flow spring and a flower type positioning ring; the overflow pipe passes through the trestle type stabilizing unit; the trestle type stabilizing unit is located in the swirl chamber of the cylindrical section, forming a radial sealing structure between the stabilizing plate and the inner wall of the separation chamber of the cylindrical section; the floater type voltage stabilizer Includes rubber float, pressure stabilizing spring, and drain base.

Description

technical field [0001] The invention relates to a liquid-liquid separation device applied in the fields of petroleum, chemical industry, environmental protection and the like. Background technique [0002] With the continuous development of oil fields, the water content of the produced fluid is gradually increasing, and the cost of crude oil extraction is increasing day by day. At present, my country's main oilfields have entered a period of high water-cut development. Many oilfields have water cuts exceeding 90%, and the comprehensive water cut of Daqing Oilfield has reached 94%. For oil fields with high water cut, the cost of produced water treatment usually accounts for more than 75% of the cost of crude oil production. Due to the energy consumption of raising water from the wellbore to the surface and the increasing cost of water treatment, the production of oil wells reaches the economic limit and is forced to be abandoned. In addition, there are potential environment...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to: solve the current cyclone separation device with high requirements on operating conditions, single operating conditions and scope of application; solve the limitation that the specific structure of the cyclone separation device can only handle a single operating parameter, and improve the adaptability of the current separation device Capability and processing accuracy; solve the problem of low separation efficiency of downhole oil-water separation devices due to fluctuation effects such as flow, pressure, and flow velocity, and cannot be applied to the limitations of changing conditions of liquid inflow

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