Rescue vehicle-mounted drilling machine power head for gas-lift reverse circulation drilling

Abstract

The invention discloses a rescue vehicle-mounted drilling machine power head for gas-lift reverse circulation drilling. The rescue vehicle-mounted drilling machine power head for gas-lift reverse circulation drilling comprises a rotator, a large-drift-diameter flushing pipe assembly and a double-channel gas-water faucet which are sequentially installed from bottom to top; the rotator is provided with a layer board assembly used for being connected with a drilling machine; and the rotator comprises a main shaft, an upper connector, an upper bearing, a lower bearing, a thrust check ring and thelike, the inner diameter of the main shaft, the inner diameter of the upper connector and the inner diameter of a flushing pipe are same, a slag return channel stepless rotator is formed, and slag return obstruction and excessive wear which are caused by fluid turbulence are avoided. The inner wall of the main shaft is provided with an anti-wear ceramic coating in a fusion covering mode, and the wear resistance and the corrosion resistance are improved. A slag turn accumulation area formed by a vertical pipe and a gooseneck pipe of the double-channel gas-water faucet serves as a slag turn accumulation buffering cushion, and wear of the gooseneck pipe is reduced. The lower bearing limits axial movement of the main shaft by adopting a thrust check ring and round nut fixing mode, and the mainshaft fixing reliability is improved. The rotator and the layer board assembly are in floating connection, therefore, a drill pipe screw thread is effectively protected, and the service life of a drill pipe is prolonged.

Description

technical field [0001] The invention belongs to the technical field of drilling equipment, and in particular relates to a rescue vehicle-mounted drilling rig power head suitable for gas-lift reverse circulation drilling. Background technique [0002] There are risks of mine disasters such as collapse, gas explosion and water seepage in underground mines. In the event of a mining disaster, rescuing the trapped people to the ground in the shortest possible time is the most effective means to save miners' lives. The method of drilling large-diameter holes from the ground and rescuing trapped people underground has gradually become a very effective method for mine disaster rescue due to its high efficiency and rapidity, and has been successfully applied many times. [0003] The vehicle-mounted drilling rig is the main equipment for ground rescue drilling. At present, the development of domestic vehicle-mounted drilling rigs is still in its infancy. It is mainly designed for th...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects and insufficiencies in the prior art, the present invention provides a rescue vehicle-mounted drilling rig power head suitable for gas lift reverse circulation drilling, which solves the problem of screw thread protection of the slag return channel without step rotators, and improves the power Overall Head Reliability

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