Differential pressure control device for packer tieback extension or polished bore receptacle
作者： Benjamin J. Gorman
DOI:
关键词: Rupture disc 、 Annulus (oil well) 、 Mechanical engineering 、 Tieback 、 Receptacle 、 Hydrostatic pressure 、 Engineering 、 Geotechnical engineering 、 Seal (mechanical) 、 Differential pressure
摘要: An annular seal for a setting tool in packer tieback extension comprises downhole oriented cup assembly. As the is run hole flexes as rising hydrostatic pressure equalizes across into what started zone with atmospheric inside extension. Once equalized self energizing feature of maintains grit and debris mud from entering where spring loaded dogs are held retracted position. If fails to equalize allows large differential sleeve surrounding annulus, rupture disc breaks inwardly so that equalized. never set after being lowered depth annulus.
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