Patent attributes
A downhole valve has a valve body having at least one port and slidably receiving in a longitudinal bore thereof at least a first sliding sleeve for opening and closing the at least one port. The first sliding sleeve has a circumferential actuation groove. An actuation assembly is extendable into the first sliding sleeve and has an actuation housing axially movably receiving thereon a compressible sealing element and a slip assembly. The slip assembly has one or more slips radially outwardly extendable under a hydraulic pressure for engaging the circumferential actuation groove of the first sliding sleeve for opening the at least one port, and the actuation assembly is longitudinally extendable to position a portion thereof on an inner side of the one or more slips for supporting the one or more slips at a radially outwardly extended configuration.
