Mud motors are used for various drilling tasks such straight hole, horizontal, directional and short radius oilfield drilling, river crossings and other utility drilling. They are connected to the drill string to rotate and steer the drill bit. Rotation is provided by a power section, which is typically a positive displacement motor that is driven by drilling fluid circulation. Axial and radial drilling loads are reacted to the drill string by the bearings within the sealed bearing assembly.

For directional drilling, a small bend angle is provided between the power section and the bearing assembly. This bend angle gives mud motors the ability to selectively drill curved or straight holes. Drill string rotation produces a straight, slightly oversized hole. In the absence of drill string rotation, the hole curves in the direction of the bend.

For more details please kindly email Sindy : downholemotor at dydrill dot com