Screw drilling device

Abstract

The invention discloses a screw drilling device, which includes a drill pipe, a rocker and a liquid discharge valve. The drill pipe and the rocker are respectively connected through a limit shaft sleeve and a high-pressure steel pipe. There is more than one high-pressure steel pipe and two limit shaft sleeves. The ends are respectively fixed on the drill pipe and the rocker through adjusting bolts. The rocker is set perpendicular to the discharge valve. There are two steel screws in the drill pipe. The two steel screws are connected by a compression spring and located in the compression The steel screw at one end of the spring is fixedly connected to the inner wall of the end of the drill pipe, and the steel screw at the other end of the compression spring is fixed on the limit bushing. There is a motor inside the rocker, and the drain valve is opposite to the end of the drill pipe and the rocker. There are rotary valves and liquid inlet valves respectively. The screw drilling device is easy to operate and has strong practicability. It can quickly crack rocks and drill quickly through pressurization, and can realize good wellbore pressure control, thus effectively solving complex downhole problems such as narrow density window and co-existence of leakage and blowout.

Description

technical field [0001] The invention relates to a drilling device, in particular to a screw drilling device. Background technique [0002] In the construction of foundation pits in construction engineering, large-scale drilling equipment is usually used to carry out deep well construction operations. Large-scale drilling equipment has high efficiency, but when the depth of drilling is not particularly deep and the foundation is soft ground, large-scale drilling rigs will cause a lot of inconvenience in operation due to their large body. At the same time, in the modern drilling industry, how to improve the drilling speed, shorten the drilling cycle, and reduce the drilling cost has been highly valued by researchers at home and abroad, and the development of drilling pressurization is even more important. The general drilling device pressurization The capacity is limited, and the pressure loss in the pipeline is large, and the energy efficiency ratio is poor. Secondly, the se...

AI Technical Summary

Problems solved by technology

Large-scale drilling equipment is efficient, but when the drilling depth is not particularly deep and the foundation is soft soil foundation, large-scale drilling rigs will cause a lot of inconvenience in operation due to their large body

At the same time, in the modern drilling industry, how to improve the drilling speed, shorten the drilling cycle, and reduce the drilling cost has been highly valued by researchers at home and abroad, and the development of drilling pressurization is even more important. The general drilling device pressurization The capacity is limited, and the pressure loss in the pipeline is large, and the energy efficiency ratio is poor. Secondly, the sealing performance of the booster pipeline is required to be better, which is virtually unfavorable for economical savings.

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