公开(公告)号：US20210010356A1

公开(公告)日：2021-01-14

申请号：US16849283

申请日：2020-04-15

Applicant: PETROCHINA COMPANY LIMITED

Inventor： Xinglong CHEN ,  Jingyao WANG ,  Chengming ZHANG ,  Shitou WANG ,  Jiazhong WU ,  Zhong REN

IPC: E21B43/16

Abstract: The disclosure provides a gasflow distribution device, a gas distributor, a pipe string and a method for separate-layer gas injection. The device includes an outer pipe, a gland, a filter screen, and a filling block with a pore structure; the outer pipe is a hollow outer pipe, used for containing the filling block, with an open upper end and a lower end with a bottom of which the center part is provided with a bottom hole, wherein the filling block is sealed to the inner wall of the outer pipe; the gland has a bottom end provided with a circular groove for setting the filter screen, and a top end distributed evenly with a plurality of top holes through the gland; and the gland is connected to the outer pipe, and the filter screen is pressed tightly against the filling block after the gland is connected to the outer pipe.