Underground self-absorption type particle jet drilling device based on Venturi effect

Abstract

The invention relates to an underground self-absorption type particle jet drilling device based on Venturi effect, which comprises an upper joint, a nozzle, a liquid inlet chamber, a throat pipe, a diffusion pipe and a lower joint, the upper end of the liquid inlet chamber is in threaded connection with the upper joint; the inner cavity of the upper joint is composed of a horn section and a nozzlesection; the outer part of the upper joint corresponding the nozzle section is a reducing section; the nozzle section is an equal diameter section; the nozzle is in threaded connection with the nozzle section; the nozzle and the nozzle section extend into the liquid inlet chamber; the upper pore channel of the nozzle is a horn pore channel, the lower pore channel is a cylindrical pore channel, and the liquid inlet chamber is provided with a liquid inlet hole; a diffuser pipe is connected at the lower end of the liquid inlet chamber, the throat pipe is arranged at the upper end of the diffusion pipe, the nozzle is coaxial with the throat pipe, and the lower end of the diffusion pipe is connected with the lower joint. According to the invention, the rock debris sucked from an annular spacecan be used as the impact particles, the mechanical drilling speed is greatly improved, the device is suitable for deep competent formations, and the rock breaking speed can be effectively improved.

Description

Technical field: [0001] The invention relates to a drilling device used in the fields of petroleum engineering, mining engineering, geotechnical engineering, etc., and specifically relates to an underground self-priming particle jet drilling device based on the Venturi effect. Background technique: [0002] With the continuous depletion of shallow oil and gas resources in our country, the current focus of oil and gas exploration and development has shifted to deep hard formations and oil and gas fields under complex geological conditions. During the drilling process, the hardness and drilling difficulty of deep well formations are increasing, so how to increase the drilling speed in hard formations has become one of the recognized worldwide problems. In the process of drilling deep wells and hard formations, there are generally a series of problems in oilfields at home and abroad, such as slow drilling speed, short service life of drilling tools, long drilling cycle, and hig...

AI Technical Summary

Problems solved by technology

In the process of drilling deep wells and hard formations, there are generally a series of problems in oilfields at home and abroad, such as slow drilling speed, short service life of drilling tools, long drilling cycle, and high drilling costs, which affect the overall economic benefits of exploration and development. Therefore, research on new efficient drilling methods for deep wells and hard formations has become an important research direction for oil and gas drilling, and plays an important role in the efficient acquisition of formation oil and gas resources

Images