Gasflow distribution device, gas distributor, pipe string and method for separate-layer gas injection

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.

Dependencies are inferred from the claim text.