Tool for preventing horizontal well from collapsing and sticking drill and using method thereof

Abstract

The invention relates to the technical field of horizontal well drilling, in particular to a tool for preventing a horizontal well from collapsing and jamming a drill and a using method thereof, and the tool comprises a lower shell, an upper shell, a power device, a transmission shaft and at least one group of crushing devices; each group of crushing device comprises a transmission gear and two crushing gears meshed with the transmission gear at the same time, and crushing teeth are arranged on the peripheries of the crushing gears; a plurality of crushing teeth are distributed and embedded in the periphery of the lower shell, and mounting cavities are further formed in the lower shell; the transmission gear is connected with the transmission shaft; in the direction from the lower shell to the upper shell, the lower shell is in a reducing shape and comprises an external expansion section and a retraction section, and the mounting cavities are all located on the external expansion section; rock falling blocks are crushed into small sizes through the circumferential force of the crushing teeth and the rotary extrusion force between the crushing gears, and the crushed rock falling blocks smoothly pass through a rotary guide tool with a large radial size through a borehole annulus. By means of the tool and the using method thereof, the problem of drill jamming caused by rock chipping can be effectively solved.

Description

technical field [0001] The invention relates to the technical field of horizontal drilling, in particular to a tool for preventing horizontal well collapse and sticking and a method of using the same. Background technique [0002] Horizontal drilling technology is one of the core technologies of shale gas development. Due to the large single well volume and long production cycle of horizontal wells, it is widely used in shale gas development drilling. Instability is easy to cause rocks to fall out, and in this case, it is easy to cause high friction and torque, sticking, and drilling difficulties. [0003] In the prior art, the Chinese invention patent document whose publication number is CN107387003A and whose publication date is November 24, 2017 is proposed to solve the above-mentioned technical problems. The technical solution disclosed in the patent document is as follows: The utility model relates to a pulse jet valve for sticking cuttings, belonging to the technical ...

AI Technical Summary

Problems solved by technology

However, in the current drilling construction process, although the circulation displacement is increased in the strata prone to rock loss to ensure that the rock loss can return to the wellhead in time, due to the limited adjustment of the on-site drilling fluid displacement, and horizontal well drilling often uses Rotary steerable tool, the radial size of the rotary steerable tool is relatively large, and large-sized rock fragments are not easy to pass through the hole annulus gap here, resulting in rock fragments and cuttings deposited at the front end of the rotary steerable tool, and finally evolved into rock fragments Drill stuck accident

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