Sand prevention water filter pipe capable of being used for geothermal well in silty-fine sand stratum

• Main Authors: TIAN PENGFEI, ZHAI ZHIXIANG, XUE ZHIPENG, TIAN KANG, LI ZHIXIANG, HOU ZENGGUANG
• Format: Patent
• Language: Chinese; English
• Published: 21.03.2023
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model relates to a sand prevention water filter pipe capable of being used for a geothermal well in a silty-fine sand stratum, which comprises a water filter pipe, the water filter pipe is formed by processing a petroleum casing pipe, the steel grade of the petroleum casing pipe is J55, the specification of the petroleum casing pipe is 177.8 * 8.05 mm, the top of the inner side of the water filter pipe is provided with a female buckle, and the bottom of the outer surface of the water filter pipe is provided with a male buckle; an inner-layer cage is fixedly mounted on the outer surface of the water filter pipe, an outer-layer cage is fixedly mounted on one side, far away from the water filter pipe, of the inner-layer cage, the outer-layer cage and the inner-layer cage are both trapezoidal wire sleeve cages, the distance between the outer-layer cage and the inner-layer cage is 5cm, and filter materials are arranged on the inner sides of the outer-layer cage and the inner-layer cage. According to th