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Title: Controllable magneto-rheological fluid-based dampers for drilling

Abstract

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.

Inventors:
 [1];  [2]
  1. Edgewood, NM
  2. Youngsville, LA
Issue Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
908445
Patent Number(s):
7036612
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F16 - ENGINEERING ELEMENTS AND UNITS F16F - SPRINGS
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Raymond, David W, and Elsayed, Mostafa Ahmed. Controllable magneto-rheological fluid-based dampers for drilling. United States: N. p., 2006. Web.
Raymond, David W, & Elsayed, Mostafa Ahmed. Controllable magneto-rheological fluid-based dampers for drilling. United States.
Raymond, David W, and Elsayed, Mostafa Ahmed. Tue . "Controllable magneto-rheological fluid-based dampers for drilling". United States. https://www.osti.gov/servlets/purl/908445.
@article{osti_908445,
title = {Controllable magneto-rheological fluid-based dampers for drilling},
author = {Raymond, David W and Elsayed, Mostafa Ahmed},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {5}
}

Patent:

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Works referenced in this record:

Analysis of Coupling Between Axial and Torsional Vibration in a Compliant Model of a Drillstring Equipped With a PDC Bit
conference, January 2009


Effect of Downhole Assembly and Polycrystalline Diamond Compact (PDC) Bit Geometry on Stability of Drillstrings
journal, September 1997