Water-controlling and oil-stabilizing inflow controller used for oil extraction system

Abstract

The invention discloses a water-controlling and oil-stabilizing inflow controller used for an oil extraction system. The water-controlling and oil-stabilizing inflow controller comprises a base pipe, a throttling part and a sliding pipe. The throttling part comprises a plate-shaped body, a rotational flow cavity, an inlet channel and a throttling hole formed in the middle of the rotational flow cavity. Formation fluid enters the rotational flow cavity along the side wall of the rotational flow cavity and flows into a throttling nozzle through the throttling hole. The sliding pipe is arranged in the base pipe in a sleeved mode and provided with flow guide holes penetrating through the side wall. When the sliding pipe is constructed to be in a first position, the pipe wall of the sliding pipe blocks the throttling nozzle, and when the sliding pipe is constructed to be in a second position, the flow guide holes communicate with the throttling nozzle. The water-controlling and oil-stabilizing inflow controller has secondary adjustment ability, so that the toe effect and the influence of oil reservoir heterogeneity are reduced. In addition, the blocking possibility is small, a larger flow passing area is obtained, a good self-cleaning function is achieved, and the water-controlling and oil-stabilizing purposes can be achieved more effectively.

Description

technical field [0001] The invention relates to the technical field of oil production systems, in particular to a controller for controlling water and stabilizing oil inflow in oil production systems. Background technique [0002] In the oil production system, it is usually necessary to control the inflow rate of formation fluid through the water control and oil inflow controller to meet the production needs. At present, the commonly used controllers for controlling water and stabilizing oil inflow are nozzle type controller for controlling water and stabilizing oil inflow, spiral channel type controller for controlling water and stabilizing oil inflow, and hybrid type controller for controlling water and stabilizing oil inflow. [0003] The working principle of the nozzle-type water control and oil inflow stabilizer controller is: by making the formation fluid flow through several orifices with a pre-designed structure size, and through the throttling effect of the orifices...

AI Technical Summary

Problems solved by technology

In this way, when solid impurities (such as gravel) are carried in the fluid, it is easy to block the orifice

[0005] Therefore, how to solve the problem that the water control and oil stabilization inflow controller of the prior art can only be in the conduction state and the problem that the orifice of the nozzle type water control and oil stabilization inflow controller is easily blocked is a problem that those skilled in the art need to solve technical issues

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