Drilling machine for exploiting shale gas

Abstract

A drilling machine for exploiting shale gas comprises a drill stem, a drill bit, a power mechanism and a support. The drill bit is composed of a drill bit body and a plurality of cones arranged on the drill bit body, the drill bit body comprises a cylindrical sleeve and a flange connecting end, the flange connecting end is connected with one end of the drill stem through a connecting module, the drill stem is of a hollow shaft structure, a spiral mechanism is arranged in an inner cylindrical hole in the drill stem, one end of a main shaft of the spiral mechanism is connected with an output shaft of a drive motor through a transmission component, the other end of the main shaft is arranged in the inner cylindrical hole in the drill stem through a supporting mechanism, the main shaft is of a hollow shaft structure, and a cooling liquid injection device and a cooling liquid sprayer are arranged on the main shaft. According to the drilling machine, the drill bit mechanism and the connecting module of the drill bit and the drill stem are precisely designed, the spiral mechanism is arranged in the inner cavity of the vertical drill stem, rock debris is discharged through sliding friction, high-pressure flushing liquid is of no need, a large amount of energy is saved, and safety and environment friendliness of the drilling machine are greatly improved.

Description

technical field [0001] The invention relates to a drilling equipment, in particular to a drilling rig for exploiting shale gas. Background technique [0002] In the 1970s, when the global oil crisis broke out, the price of oil in the Middle East countries rose by more than ten times and caused the global oil price to remain high. This caused a sharp drop in corporate profits and a sharp rise in inflation. But the deterrence of high oil prices was first broken by the United States, and the magic weapon to break this deterrent is the shale gas revolution. Through the shale gas revolution, the United States has basically achieved self-sufficiency in energy and entered the era of low-cost manufacturing. Cheap natural gas has greatly reduced the cost of electricity. The average industrial electricity price in the United States in May 2012 was 6.57 cents / kWh, equivalent to 0.41 yuan / kWh, less than half of China's coastal industrial electricity price, and less than Japan's industr...

AI Technical Summary

Problems solved by technology

The geology of my country's shale gas is very complicated. Some rock formations can absorb water and expand, and the drilling rig will be stuck; some rock formations can dissolve in water, causing the well wall to collapse and affect the drilling process, which greatly increases the technical difficulty of gas well drilling. , the cost of gas wells is greatly increased

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