A fishing device for water delivery steel pipes in water source wells

Abstract

The invention discloses a fishing device for a water delivery steel tube in a water source well. The fishing device for the water delivery steel tube in the water source well comprises a rotation pressurization hoisting system and a fisher, wherein the top of the fisher is connected with the rotation pressurization hoisting system; the fisher comprises a fishing steel tube; a cutting blade is arranged on the bottom of the fishing steel tube; an upward inclined ejection sheet is arranged on the inner wall of the fishing steel tube; the rotation pressurization hoisting system comprises a hoisting device, a drill pipe, a core drill and an oil jack; the hoisting device is connected with the top of the drill pipe; the bottom of the drill pipe is connected with the fisher; the drill pipe is driven to rotate through the core drill; and the oil jack provides an upward pressure for the drill pipe. By the fishing device, clamped matters between the water delivery steel tube in the well and the wall of the water source well can be removed, an extrusion force generated between the water delivery steel tube and a well wall tube or a well wall is released, and the accidental water delivery steel tube can be fished through the rotation hoisting device.

Description

technical field [0001] The invention relates to a fishing device for water delivery steel pipes in water source wells, belonging to the field of maintenance of water supply equipment and facilities in industrial and civil water source wells. Background technique [0002] Industrial or civil water supply wells often use steel pipes as the water delivery pipes in the wells, and the steel pipes are connected by flanges. During long-term use, the water pipe or connecting flange in the well is corroded. Sometimes when repairing the pipelines of the uphole or downhole equipment, the pipe tongs, hardware tools or screws are often accidentally dropped into the well due to improper operation. Stuck between the submersible pump and the pipe wall of the water source well, the water delivery pipe in the water source well is squeezed into the pipe wall or well wall of the water source well, which brings great difficulties to lift the water delivery pipe out of the well; in the past, the...

AI Technical Summary

Problems solved by technology

Sometimes when repairing the pipelines of the uphole or downhole equipment, the pipe tongs, hardware tools or screws are often accidentally dropped into the well due to improper operation. Stuck between the submersible pump and the pipe wall of the water source well, the water delivery pipe in the water source well is squeezed into the pipe wall or well wall of the water source well, which brings great difficulties to lift the water delivery pipe out of the well; in the past, the public fishing cone was often used to carry out the operation according to the conventional method. Salvage means to tap the male cone into the inner eye of the water delivery pipe, but because of the limited friction between the male cone and the inner wall of the pipe eye, the male cone often slips off; sometimes once there is an obstruction in the pipe eye, the male cone is difficult to tap into make it impossible to salvage

When the water delivery steel pipe in the well cannot be salvaged, the water source well is often scrapped, which not only causes certain economic losses, but also may affect the normal water use of industries and residents.

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