DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM Page: 2 of 8
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DISCLAIMER
This report was prepared as an account of work sponsored by an agency of the United
States Government. Neither the United States Government nor any agency thereof, nor
any of their employees, makes any warranty, express or implied, or assumes any legal
liability or responsibility for the accuracy, completeness, or usefulness of any informa-
tion, apparatus, product, or process disclosed, or represents that its use would not in-
fringe privately owned rights. Reference herein to any specific commercial product,
process, or service by trade name, trademark, manufacturer, or otherwise does not
necessarily constitute or imply its endorsement, recommendation, or favoring by the
United States Government or any agency thereof. The views and opinions of authors
expressed herein do not necessarily state or reflect those of the United States Govern-
ment or any agency thereof.
ABSTRACT
The objective of this program is to develop a system to both monitor the vibration of a
bottomhole assembly, and to adjust the properties of an active damper in response to
these measured vibrations. Phase I of this program entails modeling and design of the
necessary subsystems and design, manufacture and test of a full laboratory prototype.
The project continues to advance, but is behind the revised (14-month) schedule.
Tasks 1-3 (Modeling, Specification and Design) are all essentially complete. The test
bench for the Test and Evaluation (Tasks 4 & 5) has been designed and constructed.
The design of the full-scale laboratory prototype and associated test equipment is com-
plete and the components are out for manufacture.
Barring any unforeseen difficulties, laboratory testing should be complete by the end of
March, as currently scheduled. We anticipate the expenses through March to be ap-
proximately equal to those budgeted for Phase I.Quarterly Technical Report #5
DVMCS
p. 2
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Cobern, Martin E. DOWNHOLE VIBRATION MONITORING & CONTROL SYSTEM, report, January 9, 2004; United States. (https://digital.library.unt.edu/ark:/67531/metadc776929/m1/2/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.