Downhole Vibration Monitoring & Control System Page: 4 of 7
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Executive Summary
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, which entailed
modeling and design of the necessary subsystems and design, manufacture and
test of a full laboratory prototype, was completed on May 31, 2004.
The principal objectives of Phase II were: more extensive laboratory testing,
including the evaluation of different feedback algorithms for control of the
damper; design and manufacture of a field prototype system; and, testing of the
field prototype in a drilling laboratory. Phase II concluded on January 31, 2006,
and the Phase II final report was issued.
Work on Phase III of the project began during the first quarter, 2006. Efforts the
current quarter have continued to focus on the manufacture of the prototype and
precommercial parts, field test planning and commercialization.
The continued extreme lead times quoted by oilfield machine shops for collar
components, is delaying the deployment of the prototype and precommercial
units. Through diligent efforts by our purchasing department, we have received
the vast majority of the parts. The delivery date for three critical parts from one
supplier has now slipped to mid-January, which will preclude deployment for a
field test before February.
We have entered into a Memorandum of Understanding with a major US oilfield
equipment supplier, which calls for their assisting with our field tests, in cash and
in kind. We are close to signing a definitive agreement which includes the pur-
chase of the three precommercial units. We had also signed a CRADA with the
Rocky Mountain Oilfield Test Center (RMOTC), and scheduled a test at their site,
commencing ~January 15, 2007. In addition to the delays cited above, the
RMOTC drilling schedule has since slipped, and the test cannot begin until some
time in February.
Based on these factors, we are requesting a no-cost extension to April 30, 2007.Quarterly Progress Report #17
DVMCS
p. 4
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Cobern, Martin E. Downhole Vibration Monitoring & Control System, report, December 31, 2006; United States. (https://digital.library.unt.edu/ark:/67531/metadc890833/m1/4/: accessed April 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.