| 摘要 |
The present invention, which comprises two variants, relates to systems for converting electrical energy into acoustic energy and is preferably used in oil and gas production. This invention comprises applying a vibrating action onto the bed in order to increase its yield together with the output of the well. This action is applied by generating powerful low-frequency oscillations which are hardly attenuated by the earth's crust and using the flexural oscillations from a set of ring-shaped elements. Each element includes two piezo-ceramic segments in the form of half-rings (1, 2) which are located on different sides of a plane (7) crossing the longitudinal axis of the set. In one variant, both segments have the same polarisation and are fitted with a general electrode (3) on one side and separate electrodes on the other. The set is assembled from pairs of elements that contact each other through separate electrodes (4, 5). All separate electrodes of the first and second halves of the set are linked to corresponding leads (13, 14) that connect them to the opposite outputs of a transformer secondary winding, while all general electrodes are linked to a lead (15) that connects them to a central point in said winding. In another variant, the segments of each element have general electrodes on both sides but different polarisations. In any two adjacent elements in the assembled set, polarisations have opposite directions. Every other contact pair of electrodes is linked to two corresponding leads that connect them to the opposite outputs of the transformer secondary winding. This variant does not require any output from the central point of said winding. The elements of the set are regularly spaced by a spacer (8) and maintained together by a stud bolt (12).
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