Pipeline fisher and pipeline fishing method thereof

Abstract

The invention discloses a pipeline fisher. The pipeline fisher comprises a body and a drill rod; the head of the body is a cone, and the tail of the body is fixedly connected with the drill rod; and symmetrical inclined guide hole channels are arranged in the connection position of the body and the drill rod and communicate with the inside of the drill rod. The invention further discloses a pipeline fishing method. The method includes the following steps that firstly, the drill rod of the pipeline fisher is connected with a driving drill rod, and the upper portion of the driving drill rod is connected with a ground water delivery device; then the pipeline fisher is put down into a to-be-fished pipeline in a well through a lifting mechanism, broken alloys or/and iron sand are cast from a plug hole in an elbow of the ground water delivery device, a bolt is screwed at the plug hole, and a pump is started to flush the hole; and finally, the fisher is lifted through the lifting mechanism, and then to-be-fished pipeline is fished out. The pipeline fisher is easy to fabricate and low in cost; and the fishing method is simple and effective, and the pipeline (well casing) dropped into a drilled hole can be conveniently, rapidly and effectively fished.

Description

technical field [0001] The invention relates to the technical field of fishing pipelines in boreholes, in particular to a pipeline fishing device and a pipeline fishing method thereof. Background technique [0002] The field of drilling construction is very extensive, especially there are many drilling projects for installing pipelines in boreholes, such as coal mine shaft freezing projects, gas drainage wells with hollow channels, mine emergency emergency rescue channels, feeding holes, drainage holes, geological drilling etc. When the pipeline is lowered and installed after the drilling construction is completed, the pipeline often falls into the well due to negligence, causing accidents. The pipeline weighs several tons or even dozens of tons. The pipeline is buried in the hole due to untimely salvage or improper fishing tools Some of them are inside, some of them cause drilling to be scrapped, some of them waste manpower and material resources due to multi-day processin...

AI Technical Summary

Problems solved by technology

When the pipeline is lowered and installed after the drilling construction is completed, the pipeline often falls into the well due to negligence, causing accidents. The pipeline weighs several tons or even dozens of tons. The pipeline is buried in the hole due to untimely salvage or improper fishing tools Some of them are inside, some of them cause drilling to be scrapped, some of them waste manpower and material resources due to multi-day handling accidents, some of them even cover accidents, causing great waste and bad influence, etc.

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