| 摘要 |
The present invention relates to a recoverable, reinforced and vibration- damping plug for cased wells, said wells being for oil, water, gas or any other similar fluid; said plug may be used for conventional casing perforation, high penetration casing perforation and casing perforation using the tubing conveyed perforation system, comprising a pressure equalizing valve having an automatic drilling jar mounted over a holding body with sealing rings interleaved on the perimeter. The plu g also comprises a safety latch for said valve, packing means and two sets of opposite, single clamps having a wall that anchor said plug to the casing, which provides an almost complete interlocking. Besides, it is furnished with vibration-dampin g means that may be rubber rings arranged in such a pattern that they may abso rb the energy of the shots produced by the casing perforation, and so to avoid ruptures in the plug members. The plug comprises, also, a threaded mandrel, which thread is reinforced to endure stress and is tooth-shaped to allow shifting in a direction without turning the threaded members and to prevent shifting in the inverse direction.
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