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Directional Bit Diamond Directional Bit Beneficiary Technology
Release time:
2021-12-10
Author:
Source:
Directional drilling is a drilling method that uses the natural bending law of the borehole or the use of artificial oblique tools to extend the directional borehole to the intended target according to the design requirements. It can also be explained by the technology and science of drilling to reach a predetermined subsurface target and deflect the borehole in a specific direction. That is, the drilling axis is purposefully changed from curved to straight or from straight to curved. At the same time, the hole bottom guide device monitors the drilling parameters in real time, and then determines the oblique direction of the hole bottom screw motor. The key part of the technology lies in the motor drive device in the hole and the matching measurement technology. First, the high-pressure water is delivered to the motor in the hole through the drill pipe, and the rotor inside the motor in the hole is washed by the high-pressure water.
Directional drilling is a drilling method that uses the natural bending law of the borehole or the use of artificial oblique tools to extend the directional borehole to the intended target according to the design requirements. It can also be explained by the technology and science of drilling to reach a predetermined subsurface target and deflect the borehole in a specific direction. That is, the drilling axis is purposefully changed from curved to straight or from straight to curved.
At the same time, the hole bottom guide device monitors the drilling parameters in real time, and then determines the oblique direction of the hole bottom screw motor. The key part of the technology lies in the motor drive device in the hole and the matching measurement technology. First of all, high-pressure water is delivered to the motor in the hole through the drill pipe. The rotor inside the motor in the hole rotates under the impact of high-pressure water, and the drill bit is driven to rotate through the front bearing to achieve the purpose of breaking coal. In the drilling process, the directional drill pipe itself does not rotate, but only rotates the directional drill bit, thus reducing the load of the directional drill.
The bending joint of the motor in the hole is a key part, and there is a certain angle between it and the directional drill pipe. Due to the role of the bending joint, the trajectory of the directional drilling is no longer the slightly parabolic linear trajectory formed by the traditional drilling rig, but becomes a spatial curve in the direction of the bending joint.
The matching measurement system is the key component to ensure that the deep hole directional drilling is carried out according to the predetermined trajectory. The main measurement parameters of the measurement system in the hole are azimuth angle, inclination angle and bending joint direction. According to the measured parameters in the hole, the coordinates of each measurement point can be calculated by trigonometric function, and the projection map of the space curve on the horizontal and vertical planes can be depicted and compared with the designed trajectory, according to the deviation, even if the direction of the bent joint is adjusted, as well as the directional drilling trajectory to meet the design requirements.
Key words:
Drill bit, orientation, drilling, measurement, joint, direction, trajectory, motor, drilling, scheduled
