Three-dimensional rock breaking tool

Abstract

The invention relates to the technical field of downhole tools, and particularly relates to a three-dimensional rock breaking tool. The technical problems that the drilling pressure is unstable, the rock breaking efficiency is affected, the service life is greatly shortened, and the drilling cost is increased are solved. In order to solve the technical problems, the three-dimensional rock breaking tool comprises an upper connector, an upper shell, a middle shell, a lower shell, an upper mandrel, a lower mandrel, a lower connector, an inner cylinder, a middle cylinder and an outer cylinder. According to the three-dimensional rock breaking tool, under the condition that the mud displacement and the drill bit parameters are certain, the mud pressure difference between the upper end face and the lower end face of an upper piston is also certain, the formed thrust is also fixed, the thrust of the whole tool is constant and is not related to the extending stroke of the lower mandrel, and the drilling pressure borne by a drill bit is in a stable state all the time; and under the action of the mud pressure, the middle cylinder can rotate at a high frequency to impact the outer cylinder, the impact is transmitted to the lower connector, and therefore the drill bit is impacted in the circumferential direction at a high frequency.

Description

technical field [0001] The invention relates to the technical field of downhole tools, in particular to a three-dimensional rock breaking tool. Background technique [0002] The root of the development of oil drilling technology is to reduce the cost of drilling, improve the success rate of drilling, increase the drilling speed, ensure the quality of drilling and achieve the purpose of geological exploration or oilfield development. The research and application of new theories, new technologies, and new processes is the subject of oil drilling technology development. [0003] In the process of realizing the scheme, the inventor finds that the following problems in the prior art have not been well resolved: 1. In conventional petroleum drilling, PDC drill bits are widely used. , experience problems so that the drill is not delivered in time or too fast, or because of the friction of the well wall, the WOB applied to the drill bit is unstable, which affects the rock breaking ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a three-dimensional rock-breaking tool, which solves the problem that the drilling pressure of the drill bit is unstable, affects the rock-breaking efficiency, and greatly shortens the service life and increases the cost of drilling.

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