Tool Taxis prevent OBMI image rotation in Trinidad & Tobago

Preventing rotation of imaging tools is desirable to prevent image overlap. This is particularly important in large wellbores where borehole coverage is lower. Traditional methods to prevent/mitigate OBMI rotation include running swivels to release cable torque and performing multiple passes over zones of interest. By using Tool Taxis the imaging tool becomes ‘locked’ into a fixed orientation, which prevents tool rotation. An operator used this technique to prevent the tool from rotating on a dual OMBI job in Trinidad & Tobago and obtained an excellent log in 12.25” hole. Micro-resistivity imaging tools such as OBMI, FMI and NGI are also negatively affected by stick slip motion caused by overpulls. Petromac Tool Taxis help to smooth the tool motion, and the result is clear, crisp imaging logs. Operator in Trinidad & Tobago uses Petromac to prevent tool rotation in 12.25” hole Fig.1. A single pass with dual OBMI in 12.25” hole yielded an excellent log, with no image rotation or stick slip.