Micro-Magic NF1000 Low-Cost MEMS Northfinder Provides Accurate Measurement for Oil and Gas Directional Drilling

The precise control of directional drilling relies on three key parameters: inclination angle (how much the borehole is tilted), azimuth (the geographic direction the borehole faces), and tool face angle (the orientation of the directional tool). Even minor deviations in these angles can accumulate with increasing well depth, leading to significant trajectory deviations, resulting in millions of dollars in economic losses or even safety incidents. The NF1000 MEMS northfinder introduced by Micro-Magic Inc, with its advantages of low cost, compact size, high precision, and resistance to harsh environments, serves as a crucial solution to this challenge.

NF1000 adopts high-performance MEMS gyroscope and accelerometer, with excellent full temperature calibration capability (-45℃ to +120℃), which can maintain stable output even in extreme underground environments. Its north finding accuracy is as high as 1°secL (L represents latitude), and its horizontal attitude accuracy is better than 0.15 °, meeting the high requirements for directional drilling in oil and gas drilling. In addition, traditional north finding equipment is often bulky and complex to install, while the NF1000 has a size of only Φ31.8mm × 85mm and weighs less than 400g, making it easy to integrate into narrow spaces such as drill rods and tunneling machines, greatly reducing installation barriers and renovation costs.

In the specific application of directional drilling, NF1000 is firmly installed in the measuring short section of the downhole drilling tool assembly. If there is a fixed angle between the X-axis of NF1000 and the direction of the drill bit, the system will perform coordinate axis conversion to ensure that the output wellbore inclination angle and azimuth angle fully correspond to the true posture of the drilling tool. During the drilling process, the NF1000's built-in three-axis MEMS gyroscope continuously senses the angular velocity of the drilling tool, while the three-axis accelerometer senses the gravitational acceleration component. Real time calculation of three key data points through internal navigation algorithms:

(1)    Well inclination angle: ranging from 0° to 180°, used to determine whether the wellbore is vertical, inclined, or horizontal.

(2)    Azimuth: The angle from clockwise rotation from true north to the horizontal projection line of the wellbore determines the plane direction of drilling.

(3)    Tool face angle: divided into gravity tool face and gyroscope tool face. This is crucial for directional tilting and adjusting wellbore trajectories in magnetic interference environments.

NF1000 represents the leading level of MEMS process inertial devices. On the underground battlefield of directional drilling in oil and gas fields, NF1000 is providing precise, resilient, and reliable guidance for every well, helping engineers reach their targets accurately in the underground maze.

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