Matches 1 - 4 out of 4


Match Document Document Title
US20090020291 Flapper Mounted Equalizer Valve for Subsurface Safety Valves  
An equalizing valve for a flapper in a subsurface safety valve has a valve member disposed in a passage in the flapper that is made of a material that changes shape when subjected to a stimulus...
US20130133891 Equalization Valve  
An equalization valve that allows for continuous equalization of pressure above and below a sealing element is disclosed. The equalization valve includes a housing having a fluid passageway...
US20110030965 Downhole Screen with Valve Feature  
A screen assembly for downhole uses features screen sections that have a valve associated with the screen base pipe. Flow through the screen has to go into an annular space to reach one or more...
US20150211334 ACTIVATED REVERSE-OUT VALVE  
Disclosed is a reverse-out valve that minimizes swabbing of subterranean formations. One reverse-out valve includes a first mandrel, a second mandrel movable with respect to the first mandrel, a...
Matches 1 - 4 out of 4