Cement evaluation without centralizers to 85° deviation in KSA

Operators in the Middle East routinely require cement evaluation in very highly deviated wellbores. IBC-CBL in extended reach wells can quickly become inefficient and expensive due to difficulties in logging tool conveyance. Traditional methods of centralizing the IBC-CBL using in-line and slip-over centralizers caused excessive drag. This makes it challenging to descend past 60° deviation via gravity. Operators had to resort to pipe or tractor conveyed logging for higher deviations. Pipe conveyed logging is operationally complex, time consuming and risky, whereas tractor conveyance can sometimes be limited by force output in long laterals. To overcome this, the centralizers were replaced by centralizing Tool Taxis, and tool strings now routinely descend on gravity to >85° deviation, with eccentricity, ECCE, well within tolerances. Track record includes horizontal logging of IBC-CBL over 20kft, with an ECCE below 0.2”.