| 摘要 |
Methods and apparatus for removing deposits from a petroleum flow line are disclosed. An example of one method includes generating an electric wave that includes a high frequency component having a high frequency in a range from approximately 25 kHz to approximately 65 kHz. The method further includes applying the electric wave to at least two field windings circumferentially disposed around a petroleum pipe while a petroleum fluid is flowing in the petroleum pipe. The method also includes generating, in response to the applied electric wave, magnetic fields in the at least two field windings. The magnetic fields in the at least two field windings can have magnetic axes that are not collinear with respect to each other.
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