How to use hydraulic thrusters in drilling?

The hydraulic jet actuator is primarily used in drilling to harness the energy of high-pressure fluids (usually drilling mud) to perform specific mechanical tasks. Here are some specific applications of hydraulic jet actuators in drilling:

1. **Drill String Actuation**:

   - Hydraulic jet actuators can be used to push the drill string, especially when additional force is needed to overcome formation resistance or for directional drilling.

2. **Assistive Drilling Pressure**:

   - In situations where the drilling pressure is insufficient to break rock, hydraulic jet actuators can provide additional thrust to help the drill bit more effectively crush the rock.

3. **Rotating Drill Strings**:

   - Some hydraulic jet actuators are designed to generate rotational motion, used to rotate the drill string, which helps reduce drill string wear and increase drilling efficiency.

4. **Downhole Tool Operation**:

   - Hydraulic jet actuators can be used to operate downhole tools, such as activating and deactivating downhole motors, or changing the direction of downhole tools.

5. **Pressure Control**:

   - During drilling, hydraulic jet actuators can be used to control downhole pressure to prevent the influx of formation fluids into the wellbore.

6. **Emergency Response**:

   - In emergency situations, hydraulic jet actuators can be used to quickly release downhole pressure to prevent blowouts or other downhole incidents.

7. **Drilling Fluid Circulation**:

   - Hydraulic jet actuators can be part of the drilling fluid circulation system, helping to push drilling fluid between the drill pipe and wellbore walls to carry rock cuttings out of the well.

8. **Power Transmission**:

   - In some drilling operations, hydraulic jet actuators can serve as a power transmission device, transferring fluid power from surface or downhole pump stations to the drill string.

9. **Downhole Measurement Assistance**:

   - Hydraulic jet actuators can assist in downhole measurements, such as pressure, temperature, and flow rate measurements, providing data support for drilling decisions.

10. **Environmental Adaptability**:

    - In high-temperature, high-pressure, and corrosive environments, hydraulic jet actuators can be a reliable power source as they do not depend on electricity or mechanical transmission.

The use of hydraulic jet actuators requires precise design and control to ensure they effectively perform their functions during the drilling process. Operators must understand the working characteristics of hydraulic jet actuators and make corresponding adjustments based on specific drilling conditions.