Wells – With heating – refrigerating or heat insulating means – Electrical heater in well
Patent
1981-12-18
1985-12-17
Leppink, James A.
Wells
With heating, refrigerating or heat insulating means
Electrical heater in well
166177, 166 651, E21B 3604
Patent
active
045587370
ABSTRACT:
A downhole thermoacoustic device comprises a heater with a terminal chamber, connected to a source or radiator of acoustic oscillation, including a hollow housing having mounted therein a longitudinal shaft carrying coils with cores in the form of a plurality of flat rings of a magnetostrictive material, operable as the active elements adapted to generate acoustic oscillation. Accommodated intermediate the coils is a member for focusing the acoustic field, in the form of a sleeve, while the longitudinal shaft carries a tube-shaped reflector of acoustic oscillation internally of the core of each coil. The top and bottom portions of the hollow housing of the radiator of acoustic oscillation have mounted therein damping elements including sleeves of a resilient material, while a heat-insulating member including a sleeve with a fluted surface is provided intermediate the terminal chamber of the heater and the hollow housing of the radiator.
REFERENCES:
patent: 3322196 (1967-05-01), Bodine, Jr.
patent: 3449712 (1969-06-01), Angeloff
patent: 3578081 (1971-05-01), Bodine
patent: 3583677 (1971-06-01), Phillips
patent: 3848671 (1974-11-01), Kern
patent: 4437518 (1984-03-01), Williams
Simkin, E. M., "Investigation of Heat Action on Hole-Bottom Zone of Wells by Deep-Hole Electric Heaters", All-Union Oil and Gas Research Institute of the Ministry of Oil Industry of the U.S.S.R., pp. 122-123, 1968.
Kuznetsov Oleg L.
Malchenok Vladimir O.
Maxutov Rafkhat A.
Mordukhaev Khanuko M.
Ostrovsky Anatoly P.
Kisliuk Bruce M.
Leppink James A.
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