Downhole tube for coil coupling control of electromagnetic valve

Abstract

The invention provides a downhole tube for coil coupling control of an electromagnetic valve, comprising an inner tube, an outer tube, a liquid incoming passage disposed on the outer tube, and the electromagnetic valve fitting the liquid incoming passage. The inner tube is one with thickened middle, the maximum diameter of the thickened middle part of the inner tube is slightly less than the inner diameter of the outer tube, an exciting coil axially distributed is hermetically disposed in the middle of the inner tube, and the exciting coil is led out of a junction terminal at an end; a coupling coil peripherally distributed is hermetically disposed on the outer tube and is connected with the electromagnetic valve, and the coupling coil fits the exciting coil of the inner tube; both the coupling coil and the exciting coil are in a multi-set combined structure and evenly distributed on the outer periphery of the downhole tube. The invention has no need to lay a cable on the outer tube, increasing the feasibility to safely trip down a reservoir casing; an inner pass for oil well production is ensured, no mechanism needs to be added into the tube, implementation of operation measures such as late drafting and production increase is facilitated.

Description

technical field [0001] The invention relates to a downhole pipe tool for coil coupling control solenoid valve in the field of oil well completion pipe. Background technique [0002] With the continuous deepening of oilfield development, the heterogeneity of sandstone reservoirs is becoming more and more serious, the reservoir pressure drops rapidly, and the water cut rises rapidly in the middle and late stages of water injection development, and the water cut is high. Therefore, the effective production of oil well reservoirs and the prediction and control of formation water are the key to improving the economic benefits of horizontal well development. One of the important functions of the intelligent well completion system is to delay and control the edge-bottom water coning. The research on intelligent well completion technology in China is still in its infancy. Intelligent well completion mainly solves the problems of reservoir effective production analysis technology, do...

AI Technical Summary

Problems solved by technology

In the control mode of this structure, the solenoid valve needs to be supported by an external cable, which will inevitably cause: first, the cable needs to be carried in the pipe with measures such as a protective cover, which takes up a lot of space and affects the normal insertion of other tools for subsequent construction; The second is that the cables have been lowered into the ground together with the pipes for a long time. Due to the influence of temperature, corrosion, pressure and other environments, they are easily aged and damaged, which increases the cost of repairs. Third, the existence of the above basic problems affects the popularization and promotion of intelligent well completion technology

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