Speed raising tool for percussion drilling and method

Abstract

The invention discloses a speed raising tool for percussion drilling. The speed raising tool mainly comprises a driving short nipple, a casing, a screw cap, a falling prevention block, a radial spring, a sealing ring, a torsion spring, an impacting shaft, a percussion hammer, a driving hammer, an axial spring, a driving shaft, a thrust bearing, a fixed shaft, a turbine stator, a turbine rotor, a stator pressing cap, a rotor pressing cap and an adapter. The speed raising tool is characterized in that two sector lugs are arranged at the upper end of the impacting shaft; two collision bearing blocks are arranged on the percussion hammer; the lower end of the impacting shaft penetrates through the percussion hammer; the upward motion of the percussion hammer is limited by the sector lugs; the two collision bearing blocks of the percussion hammer are respectively embedded into grooves formed by the two sector lugs of the impacting shaft; the percussion hammer can relatively rotate around the impacting shaft; the torsion spring is positioned between the driving short nipple and the percussion hammer; blind holes inserted into a straight line section of the torsion spring are respectively formed in the top end of the driving short nipple and the bottom end of the percussion hammer; the driving hammer periodically impacts the percussion hammer anticlockwise. The speed raising tool disclosed by the invention can generate torsional impact and transmits the torsional impact to a drilling bit and is used for improving the drilling efficiency.

Description

technical field [0001] The invention relates to a drilling tool and an operating method thereof, in particular to an impact drilling speed-increasing tool and method for generating torque pulses, belonging to the technical field of drilling engineering. Background technique [0002] With the rapid development of economy and society, my country's oil consumption shows a long-term and rapid growth trend. Since the beginning of the 21st century, although the growth rate of demand has declined, it has remained at a relatively high level. In recent years, the average annual growth rate of oil consumption has reached 6.5%. As my country's oil demand is far from reaching its peak, there is still a lot of room for growth in the future. At the same time, my country is rich in unconventional oil and gas resources such as shale gas. It is estimated that the potential reserves of shale gas are 134 trillion cubic meters, and the economically recoverable volume is 25 trillion cubic meter...

AI Technical Summary

Problems solved by technology

However, these tool structures have disadvantages such as rapid wear of impact elements and easy failure of seals, which limit their application and promotion

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