Application and Analysis of Simultaneous Near Bit and Surface Dynamics Measurements

摘要

Axial, torsional, and bending vibrations are all present in a hot- tomhole assembly (BHA) while drilling. The dynamic response of the BHA depends on many variables, such ax drilling parameters, BHA design, hole condition and inclination, and formation proper- ties. Events, such as bit bounce, forward and backward whirl of the BHA and the bit, and drillstring resonance can occur during drilling. Some of these events are very detrimental and can cause drillstring component failures, twist-offs, etc, This paper deals with the analysis of measured drilling vibra- tion data from a field test that used both downhole- and surface- vibration measurement devices.