A high-torque drilling tool for unconventional ultra-dense rock formations

Abstract

The invention relates to a high-torque drilling tool for unconventional hyper-tight rock stratums. The high-torque drilling tool is suitable for the petroleum and natural gas industry and geological drilling operation, and solves the problems that drilling torque for the unconventional hyper-tight rock stratums is not high enough and reaction torque is difficult to overcome. According to the technical scheme, the upper end of a deceleration outer barrel is in screwed connection with an anti-falling end cap, and the lower end of the deceleration outer barrel is in screwed connection with the upper end of an output outer barrel; three primary planetary wheels are installed on three cylinders at the upper end of an output mandrel, three pins are installed in three counterbores in the stepped face of the middle of the outer circle of the output mandrel, and three secondary planetary wheels are installed on the three pins; and an upper radial bearing, a shaft sleeve and a lower radial bearing are sequentially sleeved with a stepped shaft at the outer circle of a mandrel drill bit; and the upper end of the mandrel drill bit is in screwed connection with the lower end of the output mandrel. The high-torque drilling tool provides a great torque and meets the requirement of extremely hard stratums for cutting torque; and the cutting direction of the mandrel drill bit is opposite to that of an outer barrel drill bit, cutting torques offset mutually, a drill stem is effectively protected against torsional deformation, and drilling safety is ensured.

Description

technical field [0001] The invention relates to a high-torque drilling tool for unconventional ultra-compact rock formations used in the petroleum and natural gas industry and geological drilling operations, and in particular relates to the high-torque drilling requirements in unconventional ultra-compact rock formations with extremely hard geological structures. Background technique [0002] In the oil and gas industry, drilling operations are an extremely important link, which penetrates into important links such as oil and gas resource exploration and development. Drilling operations require huge investment, high risks, and high technical difficulties. At present, my country's drilling scale has ranked second in the world. Drilling technology continues to improve, and the geological structure of drilling is becoming more and more complex. Especially with the increase of formation depth, the formation confining pressure increases, the formation is harder, and drilling requi...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-torque drilling tool for unconventional ultra-dense rock formations in order to solve the problems of insufficient drilling torque in unconventional ultra-dense rock formations and overcome the effect of anti-torque

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