Application Number: 00102551
Application Date: 2000.03.01
Publication Number: 1299917
Publication Date: 2001.06.20
Priority Information:
International: E21B43/22
Applicant(s) Name: Inst. of Oil Exploiting Technology, Daqing Petroleum Administration
Address:
Inventor(s) Name: Wang Yan;Liang Fumin;Wang Fengshan
Patent Agency Code: 23115
Patent Agent: wang zeyun
Abstract The present invention relates to an oil field polymer driven multilayer injection downhole flow control device, which is characterized by that the external surface of throttling core of said device is equipped with several circular grooves, these circular grooves can be combined with matched external shell to form step-by-step decompressional overflow channel suitable for polymer displacement multilayer injection. Said invention is novel in structure, simple, easy to control flow rate, and can make multi-stage use, and its degradability for polymer solution is less.