Sliding
Sliding is the process of drilling without rotating the drill string. The bit still rotates as it is connected to a motor. Sliding is carried out when attempts are being made to adjust the well trajectory. While drilling a directional well with a motor, the bit is run on a bent sub and hence is at an inclination rather than being vertically down. The bit is oriented in the required direction and is rotated through the motor without rotating the string. This makes it possible to drill ahead with a bit pointing in a specified direction.