Switchable flow adjusting and water controlling device and water controlling well completion oil production tubular column thereof

Abstract

The invention discloses a switchable flow adjusting and water controlling device and a water controlling well completion oil production tubular column thereof. The switchable flow adjusting and watercontrolling device comprises an outer tube, a central tube, a water controlling mechanism and a switch assembly, wherein a fluid through hole introducing the interior of the central tube is formed inthe tube wall of the central tube; the water controlling mechanism is provided with a rotational flow chamber, a flow inlet, a flow outlet and a first channel; the cross section, vertical to the radial direction of the central tube, of the rotational flow chamber is circular, and the center line of the rotational flow chamber is parallel to the radial direction of the central tube; the flow outletis located on the center line of the rotational flow chamber; the first channel communicates the flow inlet with the rotational flow chamber; the first channel is led into the rotational flow chamberand enables a fluid input into the rotational flow chamber to form a rotational flow; and the switch assembly can carry out opening-closing control on the fluid through hole for conveying the fluid into the central tube. The switchable flow adjusting and water controlling device can realize opening or closing of different production layers without moving the tubular column.

Description

technical field [0001] The invention relates to the technical field of oil field well completion, in particular to a switchable flow regulating water control device and a water control well completion oil recovery system. Background technique [0002] After the flow regulation and water control technology is introduced into the oil production system of the oil field, it is usually set to control the inflow velocity of the formation fluid. The typical method is to use the isolation packer to complete the oil well in stages, and place a The flow control and water control device is designed to control the inflow rate of formation fluid. By increasing the additional pressure difference, the output of the high-permeability section is limited, the inflow profile is balanced, the coning of edge water and bottom water is delayed, and the total production of the oil well is finally increased. [0003] However, the flow regulation and water control devices in the prior art can only co...

AI Technical Summary

Problems solved by technology

[0003] However, the flow regulation and water control devices in the prior art can only control the inflow velocity of different formation fluids through different structures and completion parameter designs, and generally have a single function, although they can prevent edge and bottom water coning to a certain extent. , to achieve a balanced inflow profile, but if the water cut in the output of the controlled layer rises sharply, the water control device may not have the expected effect at this time

Images