Smart well interval control valve

Abstract

Provided is a smart well interval control valve. A sliding sleeve is arranged in a fluid throttler, and the sliding sleeve and the fluid throttler are matched to open/close different throttling holes. The fluid throttler is connected onto a lower joint, and the lower joint is connected onto a lower cylinder body of the interval control valve. All sealing groups are compact in structure and form good dynamic/static sealing together with an upper piston, a lower piston, the sliding sleeve, an interval control valve lower cylinder body and an interval control valve upper cylinder body in conditions of underground high temperature and high pressure through Teflon materials. Two liquid inlet hole ducts are arranged at the position of the end surface of the interval control valve upper cylinder body, wherein one liquid inlet hole duct is used for controlling the valve to be opened, the other liquid inlet hole duct is public and is used for controlling the valve to be closed, and both the two liquid inlet hole ducts are in threaded sealing connection with the interval control valve upper cylinder body through 1/4 inch National (American) Pipe Thread (NPT) joints. The fluid throttler is provided with a plurality of throttling holes with different opening degrees, a hydraulic piston is adopted to push the sliding sleeve to move, the liquid inlet amount of formation fluid is adjusted through multistage throttling, and the smart well interval control valve has the advantages of being long in service life, good in sealing performance and the like.

Description

technical field [0001] The invention belongs to the technical field of interval control valves of intelligent well technology, and in particular relates to an interval control valve of intelligent wells. Background technique [0002] Smart well technology is a comprehensive system engineering covering petroleum engineering, mechanical and electronic engineering, automation engineering, communication engineering, computer engineering and other disciplines. Its key technologies mainly focus on downhole information measurement technology, production fluid control technology and data transmission. Technology Three technologies. Among them, the production fluid control technology is the key core technology of intelligent well technology, and the interval control valve is the core tool to realize the production fluid control technology. By using the fluid throttling function of the layer control valve, the individual control of the flow rate of different layers or branches can be...

AI Technical Summary

Problems solved by technology

The sliding sleeve is opened mechanically, and the internal pressure of the oil pipe is used to push the sliding sleeve to move in one direction. However, at present, the sliding sleeve can only be pushed from one side to the other, that is, it can only be opened or closed. If it needs to be opened or closed again, it can only be taken out. String adjustments at ground level

These two fluid control methods are time-consuming, labor-intensive and expensive, and cannot be adjusted in real time according to the reservoir conditions

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