Abstract
This OLID proposes a new concept or extension to mitigate critical drill string vibrations based on a fluid-particle mixture. The proposed new damper consists of a fluid-particle mixture that may be enclosed in a cavity within a component of a bit, BHA or drill string. The combination of a viscous fluid with particles enables dissipation processes or energy transfer caused by friction, shear-forces within the fluid, elastic and inelastic shocks as well as by the viscous suspension of fluid, the fluid-particle interaction and the fluid-particle-wall interaction. In contrast to conventional dry particles or fluid-only dampers, the presented damper shows advantages both in its effectiveness and in its robustness against system changes. In addition to stabilizing critical vibrations, this increase in the damping effect caused by the combination of particles and fluids has the advantage that lower damping masses are required due to the higher damping value and that the frequency range of the damper is increased. Furthermore, this type of damper is much easier to manufacture and to handle, as high manufacturing tolerances are not required due to the large number of small particles.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Baker Hughes Company, "Fluid-Particle Based Damping Mechanism for Vibration Damping in Downhole Applications", Technical Disclosure Commons, (February 03, 2025)
https://www.tdcommons.org/dpubs_series/7795