FIELD: oil and gas industry, particularly to stimulate oil and gas production by disintegration of asphalt-tar, hydrate-paraffin and ice deposits in oil and gas wells.
SUBSTANCE: heater comprises case and load-bearing member. Serially connected induction coils provided with ferrite magnetic core are serially arranged on the load-bearing member. Load-bearing member is made as conducting non-magnetic rod. Exit loop of the last winding of lower coil is connected to lower part of load-bearing member. Upper case part is made of non-magnetic and non-conducting material. Lower case part is created of magnetic and conducting material. Coils are wound on ferrite magnetic cores having different diameters. Upper coil windings are wound on ferrite magnetic core having larger diameter. Lower coil windings are wound on ferrite magnetic core having lesser diameter.
EFFECT: increased efficiency and rate of action applied to deposits, as well as increased heater capability.
1 dwg
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