Axial thrust roller type centralizer bit

Abstract

The invention relates to an axial thrust roller type centralizer bit, and belongs to the technical field of bits. The axial thrust roller type centralizer bit comprises a bit main body. One end of thebit main body is provided with a plurality of blades in the circumferential direction. Each blade is connected with a diameter retaining block. The axial thrust roller type centralizer bit is characterized in that each diameter retaining block is provided with a groove with an opening facing outwards, and each groove is internally and fixedly provided with a roller rotating shaft; each roller rotating shaft is rotationally provided with a thrust roller provided with a protruding diameter retaining block, and the thrust rollers are arranged in the circumferential direction of the bit main bodyin an inclined and deflected mode; and the deflection direction is the left rotating direction of the axial direction, and a bus of each thrust roller is curved. The axial thrust roller type centralizer bit has the beneficial effects that during drilling, the thrust rollers can produce axial splitting force, the drilling pressure can be improved, pressure taking off can be effectively reduced, the bit is pushed to drill forwards, and the drilling efficiency is improved; and the contact widths between the thrust rollers and the wellbore are increased, the circumferential stability of the bit is increased, and transverse vibration produced by the bit is reduced effectively.

Description

technical field [0001] The invention relates to the technical field of drill bits, in particular to an axial thrust roller type centering drill bit, which is suitable for drilling highly deviated wells, horizontal wells and the like. Background technique [0002] In the drilling process, the drill bit is the main tool for breaking rock, and the wellbore is formed by the bit breaking the rock. Whether the drill bit adapts to the nature of the rock and its quality plays a very important role in the selection of drilling technology, especially It has a huge impact on drilling quality, drilling speed and drilling cost. The reasonable selection of the drill bit plays an important role in increasing the drilling speed and reducing the overall cost of drilling. In the field of petroleum and geology, the performance requirements of the drill bit are getting higher and higher. During the drilling process, the rotation direction of the drill bit is clockwise from the top to the botto...

AI Technical Summary

Problems solved by technology

In the field of petroleum and geology, the performance requirements of the drill bit are getting higher and higher. During the drilling process, the rotation direction of the drill bit is clockwise from the top to the bottom. In order to suppress the lateral vibration of the drill bit, a gauge structure is adopted. In order to reduce the friction structure, but the gauge structure is set in the right-handed direction or vertically, especially in the drilling of highly deviated wells and horizontal wells, etc. During the drilling process, there is often a depressurization phenomenon due to insufficient drilling pressure, which causes the drilling speed to decrease. slow and inefficient

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