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The MWD high-temperature shear valve pulse generator plays a crucial role in drilling measurement. Here are its main functions:
1. **Data Transmission**:
- The MWD high-temperature shear valve pulse generator generates pressure pulses by changing the flow area of the drilling fluid, encoding downhole data, and transmitting it to the surface.
2. **Core Component**:
- As a core component of the continuous wave mud pulse generator, the high-temperature shear valve can produce continuous wave pressure signals to transmit effective downhole signals to the surface.
3. **Signal Modulation Capability**:
- This pulse generator is valued for its flexible and accurate source signal modulation capabilities, allowing it to operate safely without blockages.
4. **Improving Drilling Efficiency**:
- High-quality sinusoidal differential pressure source signals are crucial for efficient drilling operations, ensuring that the oscillating shear valve pulse generator can produce high-quality signals.
5. **Structural Design**:
- The structural design includes valves (stator and rotor), shaft and bearing assembly, rotating and static seals, motor and reducer, parser, pressure balancing structure (piston/rod), and lower centering device, all of which are installed in the rotating drill pipe and are part of the generator.
6. **High-Temperature Resistance**:
- Considering the actual working conditions, the MWD system's shear valve pulse generator needs to withstand high-temperature environments, thus采用 high-temperature, high-power brushless DC motors and reducers.
7. **Generation of Pressure Wave Signals**:
- When the continuous wave mud pulse generator is working, the rotor is driven by the motor to rotate continuously in a fixed direction; due to the relative position changes between the rotor and the stator, the fluid between them is throttled, generating pressure disturbances that propagate along the vertical direction at the speed of sound, thus producing different pressure values, with pressure values increasing as the flow area decreases.
8. **Numerical Simulation and Optimization**:
- To simulate the valve's operation and optimize the shear valve port, computational fluid dynamics (CFD) technology is used, studying the interaction between liquids or gases and surfaces defined by boundary conditions through numerical analysis and data structure research.
9. **Improving Information Transmission Rate**:
- Compared to rotary valves, the oscillating shear valve offers various waveform modulation methods and shows significant advantages in improving downhole information transmission rates and anti-blocking capabilities.
The MWD high-temperature shear valve pulse generator's functions make it an indispensable piece of equipment in drilling measurement, enhancing not only the efficiency and accuracy of data transmission but also the safety and reliability of drilling operations.
©Shanghai Petrogears Co., Ltd
Building 16, No.2999, Hutai Road, Baoshan District, Shanghai, China
Phone:+86 19521653487
WhatsApp:+1 7654215961
General manager:shawn.zhu@petrogears-global.com
Sales mangager:zak.sales@petrogears-global.com
Sales manager:minachen@petrogears-global.com
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