The functions of Non-magnetic suspension subs

Non-magnetic suspension subs play a crucial role in oil drilling, and their main functions are as follows:

1. **Provide a Stable Measurement Environment**:

   - Non-magnetic suspension subs are used to carry MWD (Measurement While Drilling) instruments, providing a safe and stable environment for measurement. This is essential for ensuring the accuracy of the measurement data.

2. **Reduce Magnetic Interference**:

   - Since non-magnetic suspension subs are made of non-magnetic materials, they can effectively block external magnetic fields from interfering with the measuring instruments, ensuring the authenticity of the measurement data.

3. **Convenient Calibration and Measurement**:

   - The outer wall of the suspension sub is marked with high-edge graduations, which are used to calibrate the high edge of the motor and measure the OFFSET value of MWD to the motor. This helps to improve the precision of the measurement.

4. **Structural Stability**:

   - The design of the non-magnetic suspension sub enhances the stability of the pulser within the sub, reducing the relative rotation between the pulser and the suspension sub, and improving the centering degree and sealing effect.

5. **Easy Removal and Maintenance**:

   - The design of the non-magnetic suspension sub considers the removal work of the pulser, avoiding the problem of mud seepage and difficulty in disassembling the pulser from the sub, simplifying the maintenance process.

6. **Improve Signal Transmission Efficiency**:

   - Non-magnetic suspension subs help with signal transmission, ensuring that the data from the downhole measuring instruments can be accurately transmitted to the surface.

7. **Enhance Durability**:

   - Made of high-quality non-magnetic materials, non-magnetic suspension subs have good low magnetic permeability, high mechanical strength, and excellent resistance to intergranular corrosion cracking, increasing the service life of the product.

In summary, the main functions of non-magnetic suspension subs are to provide a stable measurement environment for MWD instruments, reduce magnetic interference, facilitate calibration and measurement, ensure structural stability and easy maintenance, and thus improve the efficiency and safety of drilling operations.