Patent ID: 8191652

Claim:
A well service system, comprising: a non-rotating conveyance system; a tool connected to the non-rotating conveyance system and including anchors by which the tool can be anchored in position when located in a borehole; an operating head connected to the tool; a motor for rotating the operating head; a directional control system interposed between the tool and the operating head, wherein the directional control system comprises a universal joint in the tool through which the operating head is connected and a direction control mechanism in the tool which is operable to adjust the angle of the operating head axis relative to the tool axis and to adjust the azimuthal direction of the operating head axis; and, a shaft extending between the operating head and the direction control mechanism through the universal joint; wherein: in use, with the system located in a borehole, the directional control system can be operated so as to displace the operating head away from the axis of the borehole to perform various operations at the well wall or casing.