Field data is presented to validate the accuracy of a mathematical model to predict the drag forces involved in conveying tools into and out of deviated wells with cable (wireline or slickline). The curvature of deviated wells significantly increases drag and introduces non-linearity in the cumulative drag developed between the downhole tool and the surface. The model incorporates analysis of fluid flow in the wellbore to estimate total drag. The ability of a wireline tractor to deploy the tools into horizontal well sections may also be evaluated via the model. The model has been implemented in a computer program to numerically estimate and graphically represent the behavior of wireline and slickline cables in deviated and vertical wells.

Keywords:
prediction, drilling operation, validation plot, log analysis, reservoir surveillance, cable, field validation, baker atlas, friction coefficient, calculation
Subjects:
Well Planning, Drilling Operations, Well & Reservoir Surveillance and Monitoring, Formation Evaluation & Management, Information Management and Systems, Trajectory design, Directional drilling, Production logging, Open hole/cased hole log analysis, Completion Installation and Operations
Copyright 2001, Society of Petroleum Engineers
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