Field drill-off test results are compared with data from laboratory simulations. A simple theory for analyzing drill-off tests is developed. The weight-on-bit (WOB) decay with time is close to exponential, but large threshold WOB's, resulting from poor weight transmission downhoie, are sometimes observed in field tests.

Keywords:
drilling operation, wob, portland limestone, decay, spe drilling engineering, section area, laboratory-simulated drill-off test, drilling fluids and materials, drilling fluid management & disposal, bit selection
Subjects:
Drill Bits, Drilling Equipment, Drilling fluid management & disposal, Drilling Fluids and Materials, Drilling Operations, Drillstring Design
Copyright 1989, Society of Petroleum Engineers
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