Hala, welcome to another episode of Phone with Julian Engineering. During the violent gas warms is a very expensive activity and that's why the operators, the oil companies are always satisfied with the drilling speed. They always wanted to go faster. If you were doing it yourself pressing at home, then you know that to drill faster, you added ton to drill faster or you pressed the drill hard against the wall. Today we will focus on how we can drill faster by increasing drill string rotation. In a deep boho, this is not easy because if you were effective very long-tuned drill string too fast, it will start to swing and vibrate too much. Of course this is not favorable for us. So we have to think of other ways to achieve quick rotation or the drill bit. If we can't rotate the drill string quicker from the top, then we have to do it from the bottom. This is why we have something in the string called the mod motto. And this device is located directly above the drill bit. This motto in a simple sense works like a supermarket revolving door. The revolving door will fit faster if more people pass through it. With a dowho motto this is similar. We pump drilling mod from above and the mod will do the same for you that passes through the faster the beat turns. In the dowho motto we have a rotor and a stator. The rotor sits in the stator. The stator and the rotor are shipped in such a way that they can form small chambers which are sealed against each other. So as the drilling mod is pressed through the motto, the rotor is forced to rotate just like the supermarket revolving door. The great thing about a dowho motto is that you don't just have a rotor and a stator with this shape. What you can actually use different combinations, different designs of stator and rotor to achieve cast risks. For example, depending on the shape of the stator and the rotor you can build high speed motors with low torque or slow speed motors with high torque. Or anything in between. Everything is possible. Therefore you can select the motor to meet the exact requirements for a specific drill bit. For example, roller con bits like slower rotational speeds. While the pdc beats require higher torque because they share a weight of the rock. While the impregnated beats which son the rock away require much higher speeds to make hole. So there is up to mom dowho motto for each drill bit. This motto are surprisingly very strong and can reach many hundreds of horsepower. In some cases, 850 horsepower like this racing car behind me here. Yeah, dowho motors have become standard tools we use today in the drilling strength. They help us to reduce drilling cost by helping by increasing the root rate of penetration. If you want to know more exactly how this works, then come to our lecture. Basics of drilling engineering here in Frebek will look forward to see you. Look off!