![]() ![]() ![]() Warren, T.M., Oster, J.H.: Torsional Resonance of Drill Collars with PDC Bits in Hard Rocks, Paper SPE 49204 (1998)īowler, A., et al.: Continuous High-Frequency Measurements of the Drilling Process Provide New Insights Into Drilling-System Response and Transitions Between Vibration Modes, SPE-170713-PA (2016)Ĭaresta, M., et al.: Design modifications to a submarine propulsion system for reduction of hull radiated noise. Oueslati, H., et al.: New Insights Into Drilling Dynamics Through High-Frequency Vibration Measurement and Modeling, SPE-166212-MS (2013) Halsey, G.W., et al.: Drillstring Torsional Vibrations: Comparison Between Theory and Experiment on a Full-Scale Research Drilling Rig, SPE-15564-MS (1986) Zhang, Z., et al.: Continuous High Frequency Measurement Improves Understanding of High Frequency Torsional Oscillation in North America Land Drilling, SPE-187173-PA (2017) A structural model of the drilling tool is presented, illustrating the relationship between the natural frequency and the localized crack stiffness. By monitoring this frequency shift in real-time, catastrophic and costly failures can be avoided. We show evidence that a fundamental downhole frequency mode drops 30% during drilling operations as a crack propagates in the tool. In this work we demonstrate that downhole vibration measurements can be used for prognostic health monitoring and to track the structural integrity of the tools. Typical failures include cracks in the weaker spots of the downhole tools. Consequently, the stress on downhole tools has increased and fatigue failures are becoming more common. This improvement comes as a result of the greater capabilities of land rigs which are now able to push larger amounts of energy into the drilling system. In recent years there has been a substantial increase in the rate-of-penetration in drilling operations with the aim of reducing costs and reaching the reservoir in shorter times. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |