PDC drill bit with directional easy controllability enhancing performance

Abstract

The invention relates to a PDC (Polycrystalline Diamond Composite) drill bit with directional easy controllability enhancing performance. The PDC drill bit comprises a drill bit body, a crown part and cutting teeth, wherein a plurality of cutting teeth are arranged on the contour line of the crown part; the curved surface contour of the crown part of the drill bit is formed by sequentially and smoothly connecting a core part, a nose part, an outer side, a shoulder part and a gage section; the core part of the drill bit is a concave spherical surface; the cutting tooth near the center part of the drill bit is the cut-edge tooth; one intersection point of the cut edge of the cut-edge tooth with the excircle is positioned in the axial line of the drill bit body 1; the contour corresponding to the shoulder of the drill bit is of a spherical surface structure; and the contour corresponding to the gage section is of a conical structure. The PDC drill bit has the advantages that in the directional drilling and deflecting process, the fit of the core part of the drill bit with the shaft bottom is good; the steering resistance of the core part and the friction resistance of the gage are small; and the directional track deviation degree can be reduced through enhancing the directional operation and control performance of the drill bit and improving the shaft wall quality, so that the construction quality of directional drilling is improved.

Description

technical field [0001] The invention relates to technical equipment fields such as oil and gas drilling engineering, mining, geological drilling, construction engineering, tunnel engineering, shield tunneling and non-excavation, in particular to a PDC drill bit with enhanced directional controllability. Background technique [0002] With the increasing social demand for oil and gas resources, the exploitation of oil and gas resources with poor conditions and new oil and gas resources has become inevitable, such as deep oil and gas, shale gas, coalbed methane, offshore oil and gas resources, etc. Under the condition of new oil and gas resource exploitation, drilling operations are facing new demands. Generally speaking, the wellbore structure is facing far-reaching and more complex situations; for well types, technologies such as directional wells, horizontal wells, and lateral wells are widely used. As the direction-changing part of these wellbore structures, the kickoff se...

AI Technical Summary

Problems solved by technology

Drilling another oil well on the discovered oil field block will not only increase the investment of the owner, but also cause great damage to the local environment

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