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Controllable magneto-rheological fluid-based dampers for drilling

Patent ·
OSTI ID:908445
A damping apparatus and method for a drillstring comprising a bit comprising providing to the drillstring a damping mechanism comprising magnetorheological fluid and generating an electromagnetic field affecting the magnetorheological fluid in response to changing ambient conditions encountered by the bit.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM
Sponsoring Organization:
United States Department of Energy
DOE Contract Number:
AC04-94AL85000;
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Number(s):
7,036,612
OSTI ID:
908445
Country of Publication:
United States
Language:
English

References (3)

Effect of Downhole Assembly and Polycrystalline Diamond Compact (PDC) Bit Geometry on Stability of Drillstrings journal September 1997
Analysis of Coupling Between Axial and Torsional Vibration in a Compliant Model of a Drillstring Equipped With a PDC Bit conference January 2009
Use of Single-Cutter Data in the Analysis of PDC Bit Designs: Part 2Development and Use of the PDCWEAR Computer Code journal August 1989