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TECHNICAL BRIEF

Analysis of Energy Harvesting Positive Displacement Motor

[+] Author and Article Information
G. Robello Samuel

 Halliburton DEDS, Drilling & Completions, Houston, Texas 77242robello.samuel@halliburton.com

J. Energy Resour. Technol 129(4), 360-363 (Apr 25, 2007) (4 pages) doi:10.1115/1.2794773 History: Received October 12, 2005; Revised April 25, 2007

Drilling operations in deep and ultradeep water are increasing around the world. The development of these substantial prospects provides many challenges and requires the integration of knowledge with prudent designs at different stages of the well development. Also, more wells are drilled in rotary steerable mode and other instrumented bottom-hole assemblies. All of these tools need power, which is stored in batteries. Because the downhole power supply is limited for these tools, an alternate mode of energy supply is needed so that these tools can remain downhole for long hours. This paper examines a new energy source extraction method using the hydraulic energy obtained from the circulated drilling fluid when downhole motors are used.

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Copyright © 2007 by American Society of Mechanical Engineers
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References

Figures

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Figure 4

Contact forces between piezoelectric material and shaft

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Figure 5

Piezoelectric material activation mechanisms

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Figure 6

Theoretical power output vs. RPM for different lobes of motor

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Figure 3

Equivalent circuit of mechanical and electrical domains

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Figure 2

Housing/shaft with piezoelectric material

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Figure 1

Mechanical and electrical domains

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