公开(公告)号：US11377941B2

公开(公告)日：2022-07-05

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: F16K3/26 ,  E21B43/16

Abstract: A gasflow distribution 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 placing 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 an 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. The gland is connected to the outer pipe. The device can distribute gasflow proportionally, and can be used for separate-layer gas injection.