Flow bending type control valve and well system

Abstract

The invention discloses a flow bending type control valve and a well system. The flow bending type control valve and the well system comprise a well completion tubular column and the flow bending typecontrol valves. Multiple groups of the flow bending type control valve are sequentially arranged at intervals on the horizontal section of the well completion tubular column in the direction from theheel end to the toe end in a sealing mode. The flow bending type control valves comprise covering plates and valve bodies; the covering plates and the valve bodies are in interference fit; the valvebodies are provided with circle cavities and control cavities; the circle cavities are provided with liquid inlets communicating with the outside; the circle cavities and the control cavities are connected correspondingly by flow channels A and flow channels B; and spraying nozzles communicating the control cavities with the lower end of the valve bodies are arranged at the bottoms of the controlcavities. According to the flow bending type control valve, pressure drop flowing the flow bending type control valve is determined based on liquid physical properties (viscosity, density, flow velocity, moisture content, vapor liquid ratio and the like); pouring/extraction sections of oil deposit can be adjusted automatically; self-adjusting and self-control of the oil deposit are achieved; and due to the fact that moving parts and control cables are omitted, reliability is high and the cost is low.

Description

technical field [0001] The invention relates to the technical field of tools for underground fluid flow control in oil drilling, in particular to a baffle type control valve and a well system thereof. Background technique [0002] In the production well, due to the heel-toe effect of the wellbore and the heterogeneity of the formation, the flow distribution along the wellbore is uneven, that is, the production of the bottom hole and the high-permeability well section is obviously higher than that of the low-permeability well section. The degree of recovery of the permeability well section. In edge / bottom water reservoirs, the flow distribution along the wellbore is not balanced, and the edge / bottom water will enter the wellbore prematurely. After the water enters the wellbore, due to its far mobility Stronger than crude oil, the output of oil is greatly reduced. Therefore, adjusting the fluid production profile of the formation can prevent water or gas cones, minimize water...

AI Technical Summary

Problems solved by technology

[0003] In liquid injection wells, it is generally desired to inject water, steam, gas, etc. into the formation uniformly, but due to the pressure drop along the wellbore and the heterogeneity of the formation, the fluid flows non-uniformly in the formation, making the sweep efficiency of the injected fluid low, eventually leading to premature entry of injection fluid into the production wellbore

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