Freezing pipe cutter of shaft and construction method thereof
A technology of pipe cutter and frozen pipe, which is applied in the direction of earthwork drilling and production, wellbore/well parts, etc. It can solve the problems such as the difficulty of pipe cutting in the frozen pipe grouting technology, and achieve low cost, large pipe cutting range and fast construction speed Effect
Inactive Publication Date: 2012-05-09
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology
[0005] In order to solve the problem of difficult pipe cutting in frozen pipe grouting technology, the present invention, based on the principle of long flexible body rotation and swing, invents a wellbore frozen pipe cutter and at the same time invents a wellbore frozen pipe cutting construction method
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[0024] Such as figure 1 , the structure of the wellbore frozen pipe cutter is: it installs a variable speed motor 1 on a ground support 2, the output shaft of the variable speed motor 1 is vertically downward, and the output shaft of the variable speed motor 1 is provided with a steel strand connector 3, A steel strand 4 is connected to the steel strand connector 3, and a diamond rotary toothed disc 6 is hung and fixed on the steel strand 4 every certain distance.
[0025] The diamond rotating toothed disc 6 is welded with long diamond teeth on the periphery of the metal disc; the diamond rotating toothed disc is provided with a central hole passing through the steel strand; the diameter of the diamond rotating toothed disc is smaller than the diameter of the freezing tube, so that it There is a certain swing gap when rotating in the freezing tube.
[0026] The diameter of the above-mentioned diamond rotating toothed disk is 15-25mm smaller than the diameter of the freezing t...
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The invention discloses a freezing pipe cutter of a shaft and a construction method thereof, which are characterized in that a speed-changing motor is installed on a ground bracket; the output shaft of the speed-changing motor is vertical downwardly; a steel strand connector is arranged on the output shaft; a steel strand is connected onto the steel strand connector; a rotary diamond fluted disc is hung and fixed on the steel strand every a certain distance; the rotary diamond fluted disc rotates in a freezing pipe; simultaneously, the rotary diamond fluted disc swings in a reciprocating manner to collide the pipe wall, thus, the freezing pipe is cut; and finally, gaps communicated with surrounding rock are formed on the freezing pipe. The cutter disclosed by the invention is simple in construction process, low in cost, rapid in construction speed and low in labour intensity. The normal use of the shaft cannot be influenced.
Description
technical field [0001] The invention relates to a cutter, in particular to a device for cutting a wellbore frozen pipe. Background technique [0002] In recent years, in the process of coal mining, the construction of mines has gradually developed to the construction of deep wells in deep alluvium, but the main problems faced are poor self-supporting capacity of surrounding rocks and water leakage in shafts. The freezing method can effectively waterproof and improve the stability of the surrounding rock, and has become the most effective special shaft construction method for crossing unstable thick surface soil layers, broken rock layers, and soft rock layers, and has been widely used. However, after the frozen wall is thawed in the vertical shaft wellbore constructed by freezing method, the following two problems are difficult to deal with, which are mainly manifested in: first, the aquifer behind the wall communicates with each other through the frozen pipe and the gap beh...
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IPC IPC(8): E21B29/08
Inventor 李廷春刘洪强赵仁乐郑小平
Owner SHANDONG UNIV OF SCI & TECH