Percussive hydraulic hammer drilling apparatus special for shale gas

Abstract

The invention belongs to the technical field of rock drilling and relates to a percussive hydraulic hammer drilling apparatus special for shale gas, comprising an upper connector, an outer casing, a diversion pipe, a valve chamber component, a special control pipe, a piston component, a lower connector and a drill bit; the drill bit is disposed at the bottom of a shaft, is connected with a drill pipe in a surface power system through a lower connector, an outer casing and the upper connector and is driven through the drill pipe to rotationally drill; the diversion pipe, the valve chamber component, the special control pipe and the piston component are nested in the outer casing sequentially from top to bottom, and a power fluid passage passing through vertically is disposed in the diversion pipe, the valve chamber component, the special control pipe and the piston component; the piston component comprises a piston and a cylinder barrel, and the piston reciprocates in the cylinder barrel and applies periodic impact force on the drill bit. The drill bit of the invention performs drilling under the joint action of rotational power and impact power, thus multiplying increasing the drilling speed and prolonging the life of the drilling apparatus.

Description

technical field [0001] The invention relates to drilling equipment for shale gas exploitation, in particular to a special impact hydraulic hammer drilling equipment for shale gas, which belongs to the technical field of rock drilling. Background technique [0002] Shale gas, a new type of clean energy, is a natural gas resource that can be exploited in shale formations. The formation and enrichment of shale gas has its own unique characteristics, and it is often distributed in thick and widely distributed shale formations in the basin. Shale gas reservoirs are characterized by hard formations and deep buried layers, which are difficult to exploit and require high-level drilling and completion technologies. [0003] At present, the drilling and production of shale gas generally follows the "drilling-fracturing-gas production" collection mechanism, that is, the shale gas reservoir is drilled out of the wellbore by mechanical equipment, and the reservoir fracturing method is u...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to aim at the drawbacks of the prior art, to provide a special shale gas drill that can solve the problems of slow footage and serious drill bit wear in traditional rotary drilling machines and screw drilling tools, and is suitable for deep well drilling modes with high formation hardness. Impact hydraulic hammer drilling equipment

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