Devices and methods for fluid flow control within a production tubing string wherein a temporary flow blockage is established and selectively removed from the tubing string so that pressure testing or operation of a hydraulic tool within the string may be performed. A flow control device includes a housing...http://www.google.fr/patents/US20040262016?utm_source=gb-gplus-shareBrevet US20040262016 - Plug and expel flow control device
Numéro de demande: 10/602,578 Numéro de publication: US 2004/0262016 A1 Date de dépôt: 24 juin 2003 Brevet délivré: US6966368 ( Date de délivrance 22 nov. 2005)
