The invention relates to a horizontal well
filtration and cleaning
simulation combined testing device which comprises a plurality of
sample preparation tanks, outlets of the
sample preparation tanks are connected with an inlet of a
slurry pump through preparation tank outlet valves, an outlet pipeline of the
slurry pump is connected with an inlet of a lower conical connector of a
simulation testing cylinder, and the
simulation testing cylinder is in an L shape and is fixed to a rack. The upper end of the
simulation test cylinder is connected with an upper conical joint, an outlet of the upper conical joint is connected with a stewed
elbow, and an outlet of the stewed
elbow is connected with a plurality of test liquid collecting tanks through a test cylinder outlet pipeline; the
simulation test cylinder comprises a cylinder body clamping section, a cylinder body arc-shaped section and a cylinder body flow guide section, and the cylinder body clamping section is provided with a ring rock displacement
clamper and a pillar rock displacement
clamper. And a simulation sleeve is arranged along the axis of the
simulation test cylinder. The device can truly simulate the scouring environment of the underground casing annulus, and the test result is more real and reliable. The device can truly simulate the leakage and scouring environment of the underground casing annulus, and the test result is more real and reliable.