Liquid-jet hammer with fluid supplementation and energy storage function

Abstract

The invention discloses a liquid-jet hammer with a fluid supplementation and energy storage function. An impact hammer piston is located inside an internal cylinder, can slide forwards and backwards and divides the internal cylinder into a front chamber and a back chamber. A jet element is utilized to realize bistable jet, the direction of fluid is switched to make fluid enter the front chamber and the back chamber of the internal cylinder alternately, and the impact hammer piston is driven to act in a reciprocating manner. In the return process, fluid enters the front chamber of the liquid-jet hammer via a radial hole in the impact hammer piston, and under the action of pressure difference, the piston is pushed to return, and an energy storage spring is compressed to accumulate energy. In the stroke process, water hammer pressure and stored spring force are utilized, impact speed can be increased effectively, and part of fluid enters the back chamber via a fluid supplementation hole in the internal cylinder so as to achieve the purpose of fluid supplementation and energy storage and speed increase. The liquid-jet hammer is simple in structure, less prone to wear and long in service life, the energy storage spring and the fluid supplementation hole are utilized to realize the energy storage function, single impacting energy of the liquid-jet hammer can be enhanced, and accordingly hard rock boring is increased.

Description

technical field [0001] The patent of the present invention relates to a drilling tool, which can be used for geological core drilling, oil and gas drilling, geothermal drilling and the like. Background technique [0002] Since its birth, the hydraulic hammer technology has attracted the attention of drilling circles at home and abroad, and has been successfully applied to fields such as solid mineral resource exploration, hydrogeological drilling, and scientific drilling. Because the single impact energy of the hydraulic hammer is relatively small, it is mainly used for core drilling at present, and its vibration borrowing effect can be used to obtain long cores, and the drilling efficiency can be slightly improved. In full-face drilling and hard rock formation drilling, the drilling efficiency of hydraulic hammer drilling is much lower than air hammer drilling, which also restricts the development of this technology to a certain extent. Therefore, the research and developme...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the patent of the present invention is to provide a jet-type hydraulic hammer with the function of replenishing flow and energy storage in order to solve the problem that the single impact energy of the existing hydraulic hammer is relatively low.

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