The functions of wellbore cleaners in oil drilling

Wellbore cleaners play a variety of crucial roles in oil drilling. Here are their main functions:

1. **Remove Cuttings Bed**:

   - Wellbore cleaners effectively remove the cuttings bed deposited at the bottom of the wellbore through mechanical scraping and hydraulic action. For example, the HydroClean wellbore cleaning drill pipe uses the mechanical digging action of its fan-shaped blades to lift and throw the cuttings particles deposited on the low side of the wellbore into the annulus.

2. **Improve Wellbore Cleaning Efficiency**:

   - Compared to conventional products, wellbore cleaners can significantly enhance wellbore cleaning efficiency. For instance, the cleaning efficiency of the HydroClean wellbore cleaning drill pipe is increased by 60%.

3. **Reduce Friction and Torque**:

   - By minimizing the formation of cuttings beds and clearing cuttings from the wellbore, wellbore cleaners can lower the friction and torque between the drill string and the wellbore wall. For example, the HydroClean wellbore cleaning drill pipe can reduce friction torque by 30%.

4. **Decrease Annular Pressure Loss**:

   - Wellbore cleaners can reduce pressure loss in the annulus, improving the efficiency of drilling fluid circulation. For instance, the HydroClean wellbore cleaning drill pipe can lower annular pressure loss by more than 50%.

5. **Protect the Wellbore Wall**:

   - Some wellbore cleaners are designed with wear-resistant bands to prevent direct contact and collision between the tool and the wellbore wall, thereby protecting the wellbore wall.

6. **Enhance Drilling Safety**:

   - By effectively cleaning the wellbore, wellbore cleaners can reduce the risks of drilling accidents such as blowouts and stuck pipe, enhancing the safety of drilling operations.

7. **Increase Mechanical Drilling Speed**:

   - Wellbore cleaners can reduce drilling interruptions caused by cuttings beds and unstable wellbore walls, thereby increasing mechanical drilling speed.

8. **Adapt to Complex Wellbore Conditions**:

   - In complex wellbore structures such as high-angle wells, extended-reach wells, and horizontal wells, wellbore cleaners have the advantage of cleaning the wellbore and reducing friction and torque.

Wellbore cleaners play an essential role in the drilling process, providing strong support for the safe, efficient, and smooth progress of drilling operations through their multifunctional capabilities, including removing cuttings beds, improving cleaning efficiency, and reducing friction and torque.