Powerful Pulse Ultrasonic Emission Effect by Rare Earth Metal Drills PRA-0013

Full Title Instrumentation for the Powerful Pulse Ultrasonic Emission Effect on Oil Formations Using Magnetostrictive drills Made of Rare Earth Metals for the Purpose of Increasing the Well Discharge and Well-to-Well Sounding Tech Area / Field

• MAN-MCH: Manufacturing Technology / Machinery and Tools
• OBS-NAT: Other Basic Sciences / Natural Resources and Earth Sciences

Brief Description of Technology
This R&D work is carried out to create acoustic devices that ensure a high intensity of acoustic emission. The magnetostrictive drill, made of rare earth metals and having a unique magnetostriction factor greater than other modern ones by an order of magnitude, is used as the source of acoustic emission. Since the intensity of acoustic emission is proportional to the second-degree vibrational amplitude (V.A.), and V.A. is proportional to the magnetostriction factor; the intensity of emission, provided with such emitters, is estimated to be approximately 100 times greater in comparison with existing magnetostrictive drills.

To achieve such a level of emission intensity, it is necessary to create not only an acoustic system but also a special high-power electric vibrations generator, to find optimal heat and resonance modes, etc. The first examples of these magnetostrictive drills have been manufactured, and the investigations of their mechanical and acoustic parameters were performed.

Legal Aspects
This work is carried out by collaboration of VNIIA and the Institute of Metals Physics, Ural Division, Russian Academy of Sciences. It has been proposed to apply for a patent.

Special Facilities in Use and Their Specifications
Instrumentation for the measurement of parameters of acoustic emission at pressures of up to a few hundred atmospheres, an acoustic pond for conducting the precision acoustic measurements, and instrumentation for producing of magnetostrictive drills of rare earth metals.

Scientific Papers
Ermakov A.E., Mushnikov N.V., Zaikov N.K., Gaviko V.S., and Barinov V.A., Magnetic and magnetoelastic properties of amorphous and crystal hydrides on the basis of TbFe₂H_x, Philosophical magazine, 1993, vol.L68, no. 6, pp. 883-890.

Ermakov A.E., Mushnikov N.V., and Zaikov N.K., Magnetocrystal anisotropy and magnetostriction of TbFe₂H_x hydrides, Metals physics and metal science (FMM), 1995, vol.79, issue 4, pp. 50-60.

Ermakov A.E., Mushnikov N.V., Zaikov N.K., Gaviko V.S., and Korolev A.V., Hydrogen induced magnetic anisotropy and magnetostriction in rare earth intermetallides with MgCu₂ structure, Metals, 1995, vol. 6., pp. 100-105.

Mushnikov N.V., Gaviko V.S., Novikov F.I., Andreev A.V., Lapina T.P., Bartashevich M.I., Maikov V.V., and Barmakov A.E., Magnetostriction of alloys on the basis of LaCo₁₃, Jornal of Alloys and Compounds, 1992, Vol.187, p.p. 285-252.

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