Hole bottom falling object fisher in drilling

Abstract

The invention discloses a hole bottom falling object fisher in drilling. The fisher comprises a finishing barrel, a fast joint arranged at one end of the fishing barrel and a fishing net arranged at the other end of the finishing barrel; the finishing net is formed by arraying a plurality of fishing rods; one ends of the fishing rods are arranged on the inner wall of the finishing barrel and the other ends of the fishing rods are suspended in air. The hole bottom falling object fisher in drilling is simple in structure, machining and preservation are easy due to the integral design and the assembly is convenient; the whole fisher is light, has lower demands on a power system, and is mainly used for the fishing in the drilling hole during engineering constructions such as petroleum drilling, geological drilling, freezing drilling, a water source well, a deep large-aperture gas extraction well, drainage, material conveying and an emergency rescue channel. The fisher is safe in use, easy to operate and control and capable of effectively fishing hole bottom falling objects.

Description

technical field [0001] The invention relates to a fishing device for falling objects at the bottom of boreholes, which is mainly used for fishing for objects falling in holes in drilling and drilling construction engineering. Background technique [0002] Deep and large-diameter drilling is widely used in coal mines and non-coal mines, especially in underground mines. Generally, the diameter of the borehole is Ф800~1300mm, the depth is 400m~900m, and the steel pipe of Ф630mm~Ф1000mm×18mm is installed, which is the passage connecting the ground and the underground. For example, underground gas drainage, drainage channels, emergency rescue, material transportation and other small and medium-sized wellbores are all constructed by drilling methods, which are widely used because they are less affected by geological and hydrological conditions and sites, and there are fewer personnel and high efficiency. . In recent years, the State Council has issued a policy on comprehensive g...

AI Technical Summary

Problems solved by technology

If the falling objects at the bottom of the well are not cleaned up, two or three trips to the drilling tool have to be made, and most of the time is spent on auxiliary time such as salvage. In the past, it took several hours to salvage the falling objects at the bottom of the well. days, or even longer, and some even drilled holes are scrapped, which wastes manpower and material resources, seriously restricts drilling efficiency, adds many hidden dangers to safe production, and also affects the construction period.

[0004] Therefore, it is of great significance to develop an effective salvage device at the bottom of deep and large-diameter boreholes in construction; decisive and effective salvage is an urgent demand for handling objects dropped in boreholes, and it is indispensable, but the prior art There are no reports of such equipment in

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