Internal antiscale coating for oil well tubes and gathering pipelines in ASP-combinational flooding oil recovery

The invention discloses an internal antiscale coating for oil well tubes and gathering pipelines in ASP-combinational flooding oil recovery. The coating comprises base coat and finishing coat, wherein the base coat comprises the following raw materials in percentage by mass: 40 to 50 percent of epoxide resin, 10 to 30 percent of aromatic amine curing agent, 0.05 to 0.30 percent of modified polyorganosiloxane flatting agent, 0.01 to 1.00 percent of polyorganosiloxane defoamer, 4 to 8 percent of talc, 1.5 to 2.5 percent of zinc phosphate, 9 to 12 percent of barite powder, and 10 to 13 percent of titanium dioxide; and the finishing coat comprises the following raw materials in percentage by mass: 45 to 60 percent of epoxide resin, 15 to 20 percent of aromatic amine curing agent, 8 to 12 percent of barite powder, 1.5 to 3.5 percent of graphite, 0.05 to 0.30 percent of modified polyorganosiloxane flatting agent, 0.01 to 1.00 percent of polyorganosiloxane defoamer, and 15 to 20 percent of titanium dioxide. The inte