FIELD: oil and gas industry, particularly for cleaning inner well pipe surface by burning out asphaltic tar and hydrated wax-bearing deposits.
SUBSTANCE: device has body of sealed bell shape connected to logging cable and liquid rocket plant arranged coaxially with body. Rocket plant comprises nozzle facing downwards, tanks for oxidizing agent and fuel, fuel delivery system and rocket fixedly secured in body. Fuel delivery system includes oxidizing agent and fuel supplying pipelines with electrically driven valves operated by electric signals from ground surface through logging cable.
EFFECT: increased cleaning efficiency, simplified cleaning control.
3 cl, 1 dwg
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