Vibrational apparatus of an ensemble of bottomhole Assemblies which comprises first and second Magnetic arrangements which are Concentric.And where the interactions between the Magnetic arrangements are through the annular Space length between them.

摘要

Vibrational apparatus of an ensemble of bottomhole Assemblies which comprises first and second Magnetic arrangements are ConcentricAnd where the interactions between the Magnetic arrangements are through the annular space between longitudinal extension.