PDC drilling bit realizing impacting rock breaking by jet flow vibration

Abstract

The invention discloses a PDC drilling bit realizing impacting rock breaking by jet flow vibration. The PDC drilling bit is composed by a threaded connector, positioning pins, a jet flow vibration short section, a drilling bit body, a fluid inlet, a ring runner, an injecting runner, a right feedback runner, a right flow separating runner, a left flow separating runner, a left feedback runner, a jet flow vibration cavity and a fluid outlet. Drilling fluid enters the inner part of the PDC drilling bit realizing impacting rock breaking by jet flow vibration from the threaded connector, then passes through the jet flow vibration short section, and flow out of a water hole of the drilling bit, when the drilling fluid passes through the jet flow vibration short section, the drilling fluid circulates and switches directions in the designed ring runner, when direction switching is completed by the drilling fluid, pressure fluctuation is generated, jet flow vibration is formed, and rock breaking of the drilling bit is accelerated by using the jet flow vibration function generated in the switching process of the drilling fluid. According to the PDC drilling bit realizing impacting rock breaking by jet flow vibration, influence of novel structural design on PDC drilling bit teeth can be effectively lowered, the jet flow vibration function is provided, and the rock breaking efficiency of the drilling bit is improved.

Description

technical field [0001] The invention relates to a PDC drill bit suitable for impact rock breaking through jet oscillation in oil and gas drilling engineering, and also applicable to the technical fields of drilling equipment such as mining engineering, building foundation engineering construction, geology, and hydrology. Background technique [0002] In modern oil and gas drilling engineering, the drill bit, as one of the key technical equipment of drilling equipment, is in direct contact with the formation. Under the action of drilling pressure and drilling torque, the rock is broken, and a certain wellbore is formed according to the drilling design. The working performance of the drill bit has an important impact on the drilling efficiency and production cost. If the working performance of the drill bit is stable, the service life will be greatly improved, the number of trips will be reduced, and the economic cost will be saved. An important direction in the field of natur...

AI Technical Summary

Problems solved by technology

Structural optimization design on the basis of conventional drill bit structure can improve the performance of the drill bit, but it cannot fundamentally break through the bottleneck of existing drill bit technology. Therefore, how to further improve the rock breaking efficiency of the drill bit and increase the practical function of the drill bit has become a modern drill bit technology. key issues of development

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