Understanding How MWD (Measurement-While-Drilling) Works

The increasing complexity of drilling due to the increasing numbers of horizontal and directional drills has also forced well logging to adapt and improve. The result of this improvement and adaptation has led us to MWD, short for Measurement-While-Drilling, equipment.

But what exactly is MWD, and how does it work? Let’s find out!

Drilling operations have become increasingly complex

What Is MWD?

MWD has become commonplace in drilling operations today. Essentially, it constitutes the measurement and evaluation of physical properties, such as temperature and pressure, during drilling. MWD also includes evaluating the wellbore trajectory in three-dimensional space.

In other words, MWD lets drilling companies take measurements as the drilling is in progress, which saves time and cost and allows decisions and corrections to be made in real-time.

How MWD Tools Work

Measurement tools are incorporated into the drill string and deliver information to the surface in real-time, which helps in steering the drill. MWD tools also offer the advantage of not removing the drill pipe from the well to make measurements.

These measurements are recorded in a memory device and then transmitted to the surface. The data transmission method can vary from equipment to equipment but usually involves transmission through pressure pulses, which can either be positive or negative.

Within the MWD tools, some tools are responsible for measuring formation parameters, such as porosity, sonic velocity, and resistivity. These are referred to as LWD (Logging-While-Drilling) tools.

Much like other MWD tools, LWD tools also use similar data storage and transmission methods. Nevertheless, data transmission is encoded and then decoded at the surface and sent offsite immediately.

Today, MWD tools not only provide real-time drilling information but also deliver drill bit information and wellbore position, as well as directional data. MWD tools use accelerometers, magnetometers, and gyroscopes to measure borehole inclination and azimuth as the drilling process occurs.

Why and When We Need MWD Tools

As the well angle exceeds 60 degrees, logging tools can’t be pushed any longer through the well, rendering conventional logging tools ineffective. MWD tools were, therefore, first conceived in the 1980s to overcome these challenges of well drilling at extreme angles.

MWD tools are crucial for drilling engineers these days as they provide the information required to drill precise wells. The primary use of these survey tools is in directional drilling so that the driller can efficiently steer the well towards the target zone.

True Shot’s M1 MWD System

Latest Development: The M1 MWD System by True Shot

After seven years of experience drilling more than 7,000 wells, True Shot has developed the latest proprietary MWD technology in the form of The M1 MWD System.

This survey tool delivers the fastest, most accurate, and reliable data and is designed for unmanned MWD drilling applications. Check our innovative products and services or contact us now for more information.

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