Abstract: This is a drilling tool which can be manipulated from the surface to one position to drill a directionally oriented hole or to a second position to drill a straight hole. A special tool is inserted in the drill string near the bit. It includes a hollow torque member, which is connected into the drill string. Surrounding the torque member are two eccentrically bored sleeves, one within the other. The two sleeves are rotatable with respect to each other and with respect to the torque member. When the cam sleeves are opposed, the torque member is aligned along the borehole axis. When the cam sleeves are oriented in the same direction, their eccentricity is added and the torque tube is thrown off center to cause the bit to drill in a prescribed direction. Means are provided so that the position of the sleeves can be changed from the surface. Manipulation is by mud circulation and pipe movement.