A fine-tuning angle device for balanced drilling pressure

Abstract

The present invention provides a fine-tuning angle device for balanced drill pressure, comprising: a plurality of piston cavities arranged inside the upper casing; Multiple first limit springs are correspondingly welded between the hydraulic push columns; the lower casing connected to the upper casing has multiple piston grooves inside the lower casing, and multiple hydraulic push columns communicate with multiple pistons, and multiple hydraulic push columns communicate with multiple pistons. The column is in contact with multiple push plates, multiple connecting rods are connected to the upper housing through multiple piston grooves, and the lower end of each piston is provided with a second limit spring; the lower housing is connected to the drill bit connecting seat through multiple connecting rods . The invention balances the weight-on-drill fine-adjustment angle device, which converts the uneven force on the drill bit into lateral thrust, and the lateral thrust can restore the drill string to a vertical position. By using this design device, it is possible to balance the drilling pressure of the drill bit and automatically adjust the trajectory of the wellbore during drilling, so as to achieve the expected trajectory effect.

Description

technical field [0001] The invention relates to the field of oil field drilling, in particular to a device for fine-tuning angles of balanced drilling pressure. Background technique [0002] At present, during the drilling process of oilfields, the formations encountered are complex and diverse. Due to the inclination angle of the formation and the uneven distribution of rock hardness in the formation, the drill bit will deviate from the original predetermined track during the drilling process, and will deviate with the smaller side of the formation inclination angle and rock hardness. [0003] In my country, the main technologies currently used for "deflection prevention and straightening" of vertical wells include full-bore drilling tool assembly, pendulum assembly, off-axis assembly, flexible assembly, and deflection correction using directional drilling with power drilling tools. Although these methods can solve the well deviation problem to a certain extent, they all h...

AI Technical Summary

Problems solved by technology

However, the discharge holes are periodically staggered and cannot control the pressure output stably, and the uneven force on the drill bit still exists

The downhole drilling tool vibrates strongly, although it has a counterweight, it is difficult to control it accurately due to the erosion of the mud

[0006] Therefore the defect in the prior art is: for drill bit drilling process, because stratum inclination angle, stratum rock hardness distribution is uneven, can make drill bit deviate from original predetermined track in drilling process, can follow formation inclination angle and rock hardness little one side offset

When the drill bit is tilted, the drill bit cannot be adjusted and balanced in time and quickly, and the force on the drill bit is uneven, so that the drill bit cannot realize the balance of the drilling pressure of the drill bit during drilling, and the wellbore trajectory cannot be automatically adjusted, and the expected trajectory effect cannot be achieved.

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