A drilling system and method

Abstract

The embodiment of the invention discloses a well drilling system and method. The well drilling system comprises a shock wave generation device, a coiled tubing and a jet nozzle, wherein the shock wavegeneration device extends into a shaft and is used for generating shock wave through a pulse discharging way; the coiled tubing is connected with the upper end of the shock wave generation device andis used for conveying well drilling liquid to the shock wave generation device to enable the shock wave generated by the shock wave generation device to act on a rock by taking the well drilling liquid as media; the jet nozzle is connected with the lower end of the shock wave generation device, and is used for restraining the well drilling liquid to form a jet flow under the function of the impact wave. By use of the technical scheme provided by the embodiment of the invention, rock with high hardness in a deep stratum can be effectively broken.

Description

technical field [0001] The present application relates to the technical field of oil and gas exploitation, in particular to a drilling system and method. Background technique [0002] Drilling is an important link in oil exploration and oilfield development, and rock-breaking technology is the core content of drilling engineering. Improving the efficiency of drilling and breaking rock can realize rapid and low-cost development of oil and gas reservoirs. As my country's medium and shallow oil and gas exploration reserves grow more and more slowly, the focus of future exploration and development will shift to deep oil and gas resources. In the development process of deep wells and ultra-deep wells, due to the dense formation, high hardness and strong abrasiveness, the conventional drilling method transmits the drilling pressure and torque of the drilling rig to the drill bit through the drill pipe to break the rock. As the drilling depth increases, the utilization efficiency o...

AI Technical Summary

Problems solved by technology

In the development process of deep wells and ultra-deep wells, due to the dense formation, high hardness and strong abrasiveness, the conventional drilling method transmits the drilling pressure and torque of the drilling rig to the drill bit through the drill pipe to break the rock. As the drilling depth increases, the utilization efficiency of mechanical energy decreases. This leads to problems such as lower drilling speed, longer drilling cycle, and higher cost, which severely restricts the exploration and development of deep oil and gas in my country. Therefore, a new efficient drilling method for deep hard formations is urgently needed

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