Layering water injection flow intelligent adjusting system under pit

Abstract

The invention relates to a layering water injection flow intelligent adjusting system under a pit. The layering water injection flow intelligent adjusting system under the pit comprises a PLC controlunit, an upper joint, a cone-hole flow passage converting pipe, a power generation unit, an intelligent water dispenser and a lower joint, wherein the upper joint, the cone-hole flow passage converting pipe, the power generation unit, the intelligent water dispenser and the lower joint are successively connected from top to bottom, two deflected holes are formed in both sides of the cone-hole flowpassage converter pipe, and an upper round taper hole is located between the two deflected holes; the tail end of the upper round taper hole is communicated with a power generation branch and a waterinjection branch, an electromagnetic valve is installed on the cone-hole flow passage converter pipe, and the tail end of the power generation branch is connected with a lower round taper hole; the lower round taper hole is communicated with the power generation unit, and an impeller power generator under the pit is arranged in the power generation unit; the lower end of the power generation unitand the water injection branch are connected with the intelligent water dispenser, a water dispensing cavity of the intelligent water dispenser is communicated with a water outlet cavity through an adjustable water nozzle, a platinum thermistor thermometer, a lever flowmeter and a silicon piezoresistive pressure meter are arranged in the water outlet cavity, and the adjustable water nozzle is connected with a gear motor. Repeated throwing and catching operations are not needed, and the water injection amount can be adjusted in real time.

Description

technical field [0001] The invention relates to a layered water injection system, in particular to an intelligent adjustment system for downhole layered water injection flow. Background technique [0002] Layered water injection is an important technical means to achieve long-term high and stable production in oilfield development. The "bridge type eccentric + steel pipe cable direct reading measurement and adjustment" layered water injection technology has been successfully applied to the measurement and adjustment of layered water injection wells in domestic oilfields. However, this method There are the following problems in use: [0003] (1) To determine the amount of water injection between layers, measuring and adjusting instruments need to be placed layer by layer. This process uses equipment including cable winches, wellhead sealing blowout preventers and wellhead pulley blocks, which requires a lot of manpower and material resources and is time-consuming; [0004] (...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an intelligent adjustment system for downhole layered water injection flow rate, which is used to solve the existing layered water injection need

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