An intelligent layered water injection device

Abstract

The invention relates to an intelligent layered water injection device. The upper end of the shell is screwed with an upper joint for water injection, the lower end of the shell is screwed with a lower joint for water injection, and the lower part of the center hole of the upper water injection joint is connected with an axially penetrating upper joint offset hole. , the lower part of the inner cavity of the water injection lower joint is provided with an axially penetrating lower joint offset hole, and the lower port of the upper joint offset hole is connected to and penetrates through the upper end of the lower joint offset hole through a screen; the water injection lower joint is also provided with The axial connection hole of the lower joint parallel to the offset hole of the lower joint, the middle side wall of the lower joint for water injection is provided with a formation water injection port, the formation water injection port extends radially inward and communicates with the lower end of the axial connection hole of the lower joint; An intelligent water distributor is installed in the lower part of the inner cavity of the shell, the axis of the intelligent water distributor is parallel to the axis of the screen pipe, and the water outlet at the lower end of the intelligent water distributor communicates with the upper end of the axial connection hole of the lower joint. The device can realize precise water injection to the stratum where it is located, and does not affect the water injection of the stratum below and the access of instruments into and out of the well.

Description

technical field [0001] The invention relates to a layered water injection well in the field of petroleum and natural gas, in particular to an intelligent layered water injection device, which belongs to the technical field of layered water injection. Background technique [0002] After the oil field is put into development, with the increase of the production time, the pressure of the oil layer will continue to drop, resulting in a significant reduction in the production of the oil well, and even stop the injection and production. At this time, in order to make up for the underground deficit caused by the extraction of crude oil, maintain and increase the pressure of the oil layer to achieve In order to achieve high and stable production in oil fields, it is necessary to inject water into the oil layers. [0003] Layered water injection implements water injection through the isolation of packers and the control of water nozzles, so that high, medium and low permeability form...

AI Technical Summary

Problems solved by technology

Effective pressure pulse encoding and decoding is an important link to realize the cable-free two-way communication between the ground and downhole commands and data. The conventional pressure pulse encoding and decoding is realized based on the standard square wave sequence, while the wellbore pressure distribution of water injection wells is a dynamic process. Unable to form a standard square wave sequence, the bit error rate of decoding is high

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