Anti-corrosion wear-resistant drill pipe and preparation method thereof

An anti-corrosion wear-resistant drill pipe, wherein the anti-corrosion wear-resistant drill pipe comprises a drill pipe main body, sacrificial anodes and wear-resistant belts,

• wherein the sacrificial anodes comprise a first sacrificial anode, a second sacrificial anode, a third sacrificial anode and a fourth sacrificial anode, the first sacrificial anode, the second sacrificial anode, the third sacrificial anode and the fourth sacrificial anode are identical in chemical compositions, physical properties, size structure and functional characteristics, and the first sacrificial anode, the second sacrificial anode, the third sacrificial anode and the fourth sacrificial anode comprise the chemical compositions in following proportions:
• 94-97 wt % of aluminum, 2.5-5 wt % of zinc, 0.05-0.3 wt % of indium, 0.02-0.2 wt % of silicon, 0.06-0.12 wt % of tin, 0.05-0.4 wt % of titanium, and 0.02-0.12 wt % of iron;
• the wear-resistant belts comprise a first wear-resistant belt, a second wear-resistant belt and a third wear-resistant belt, the first wear-resistant belt, the second wear-resistant belt and the third wear-resistant belt are identical in chemical compositions, physical properties, size structure and functional characteristics, and the first wear-resistant belt, the second wear-resistant belt and the third wear-resistant belt comprise chemical compositions in following proportions:
• 86-90 wt % of iron, 6-15 wt % of chromium, 1-3 wt % of nickel, 0.5-0.8 wt % of carbon, 0.15-1.2 wt % of silicon, 0.9-1.6 wt % of manganese, 0.5-1.3 wt % of molybdenum, 0.1-0.5 wt % of boron, and 0.05-0.2 wt % of titanium;
• geometrical relationships of the drill pipe main body, the first wear-resistant belt, the second wear-resistant belt, the third wear-resistant belt, the first sacrificial anode, the second sacrificial anode, the third sacrificial anode and the fourth sacrificial anode are as follows:
• the second wear-resistant belt is positioned in a center of a drill pipe, the second sacrificial anode and the third sacrificial anode are mirror symmetric with respect to a circular section B at a distance of h/2, the first wear-resistant belt and the third wear-resistant belt are mirror symmetric with respect to the circular section B at a distance of L+h/2, the first sacrificial anode and the fourth sacrificial anode are mirror symmetric with respect to the circular section B at a distance of L+3h/2, the first wear-resistant belt, the second wear-resistant belt, the third wear-resistant belt and a drill pipe matrix are in transition connection by two identical 90° rounded corners, and the circular section B is a tangent plane perpendicular to an axial direction at the center of the drill pipe;
• and
• L is a length of each of the first sacrificial anode, the second sacrificial anode, the third sacrificial anode and the fourth sacrificial anode, h is a length of each of the first wear-resistant belt, the second wear-resistant belt and the third wear-resistant belt, and L and h are lengths parallel to the axial direction of the drill pipe.