Here is the translation of the usage method of non-magnetic drill collars :

1. **Visual Inspection**: Before use, carefully inspect the appearance of the non-magnetic drill collar to ensure it is intact and all parts are securely fastened, with no obvious damage or looseness.

2. **Thread Inspection**: Check the connecting threads at both ends of the non-magnetic drill collar to ensure they are clean, complete, and free from wear or damage, guaranteeing a solid and sealed connection.

3. **Preparation of Matching Tools**: Prepare the matching tools such as drill bits and drill pipes that are compatible with the non-magnetic drill collar, and check their performance to ensure they are in good condition.

1. **Determine Installation Position**: Based on the drilling design and requirements of the measurement instruments, determine the installation position of the non-magnetic drill collar in the drill string. Typically, the non-magnetic drill collar should be installed above the measurement instruments to reduce the interference of the drill string's magnetic field on the measurement instruments.

2. **Connection Operation**: Connect the non-magnetic drill collar with the upper drill string and lower drill tools. When connecting, follow the correct order and method. First, align the male thread end of the non-magnetic drill collar with the female thread end of the upper drill string, then slowly rotate the non-magnetic drill collar to gradually engage the threads until a secure connection is achieved. During the connection process, control the force to avoid damaging the threads due to excessive force.

3. **Tightening and Inspection**: After the connection is complete, use a dedicated tightening tool to secure the connecting threads of the non-magnetic drill collar, ensuring it will not loosen during the drilling process due to vibration or pressure changes. After tightening, re-inspect the sealing and stability of the connection to ensure there are no leaks or looseness.

1. **Downhole Operation**: During the downhole process, control the downhole speed to avoid excessive or forceful actions that could impact or damage the non-magnetic drill collar and measurement instruments. Also, closely monitor the wellhead conditions and adjust the downhole parameters in a timely manner to ensure a smooth drilling process.

2. **Drilling Process Monitoring**: In the drilling process, continuously monitor the working status of the non-magnetic drill collar and the data from the measurement instruments. The data transmitted by the measurement instruments can provide information on downhole parameters such as drilling pressure, torque, and well deviation, allowing for effective control of the drilling process. If abnormal data or issues with the non-magnetic drill collar are detected, take immediate measures, such as adjusting the drilling pressure or pausing the drilling, to prevent accidents.

3. **Tripping Operation**: When tripping out, follow the correct tripping procedure. First, lift the drill string from the bottom of the well, then slowly rotate the non-magnetic drill collar to gradually disengage the threads until it is completely detached. During the tripping process, control the tripping speed and force to avoid damaging the non-magnetic drill collar or the connecting threads due to improper operation.

1. **Cleaning and Decontamination**: After use, promptly clean the non-magnetic drill collar to remove mud and drill cuttings from its surface. Use specialized cleaning tools or high-pressure water guns for cleaning, ensuring the surface is clean and free of residues.

2. **Inspection and Maintenance**: After cleaning, conduct a comprehensive inspection of the non-magnetic drill collar to check for wear, damage, or deformation. Repair or replace any problematic parts as necessary. Also, perform appropriate maintenance on the non-magnetic drill collar, such as applying anti-rust oil, to extend its service life.

3. **Storage and Custody**: Store the non-magnetic drill collar in a dry, ventilated, and clean environment, avoiding direct exposure to dampness, corrosive gases, or high temperatures. When storing, place the non-magnetic drill collar flat or hang it vertically to prevent deformation or damage from stacking or heavy pressure.