| 摘要 |
This invention refers 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 plug 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-damping means that may be rubber rings arranged in such a pattern that they may absorb 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.
|
