In oil and gas extraction, it is crucial to obtain real-time information from the borehole environment. The so-called Measurement While Drilling (MWD) technology captures this data directly during the drilling process — under extreme conditions. One of the most important methods for data transmission in this context is Mud Pulse Telemetry. Precise pressure sensors play a central role in this.
Mud Pulse Telemetry is a method where data from the borehole is transmitted via pressure impulses in the drilling fluid to the surface. These pressure fluctuations — known as mud pulses — are generated by an impulse valve at the bottom of the drill string and carried by the drilling fluid (usually mud) to the sensors at the surface.
Pressure sensors are used at the surface to detect the incoming mud pulse signals. They must detect even the tiniest pressure changes — amid a baseline noise of up to 5000 psi (approximately 345 bar). Precise detection of these signals is essential for the quality of the transmitted data.
The environmental conditions during drilling are extreme: high pressures, strong vibrations, dirt, chemicals, and high temperatures. The pressure sensors used must therefore operate with extreme precision and also possess high long-term stability, robustness, and temperature resistance.
STS offers a selection of highly precise pressure sensors that are ideal for the requirements of Mud Pulse Telemetry. Thanks to modular construction, the sensors can be adapted to various installation situations. Thanks to their combination of accuracy, robustness, and compact design, they are excellent for MWD systems and comparable drilling applications.
Mud Pulse Telemetry is a proven method for transmitting important data from underground in real-time during the drilling process. Pressure sensors play a key role: only if they detect the pressure impulses accurately and reliably can the MWD system perform at its full potential. With suitable sensor solutions, operational safety, efficiency, and data quality during the drilling process can be significantly improved.