Pressure test and bypass valve with rupture disc

An apparatus for use in a wellbore comprising:

• housing means for defining a central opening therein and a port therein in communication with said central opening;
• mandrel means for close sliding engagement in said central opening;
• first valve means for allowing fluid flow through said central opening when in an open position and for preventing fluid flow through said central opening when in a closed position;
• second valve means for allowing communication between said central opening and a well annulus when in an open position and preventing communication between said central opening and the well annulus when in a closed position;
• and
• pressure responsive means for substantially simultaneously actuating said first and second valve means between said open and closed positions thereof in response to a pressure in said well annulus, said pressure responsive means being characterized by a rupture disc which is adapted for rupturing in response to a differential pressure thereacross and thereby allowing said annulus pressure to act across an area on said mandrel means such that said mandrel means is moved relative to said housing means.

A valve apparatus for use in a tool string in a well bore, said apparatus comprising:

• an outer housing defining a central opening therein and a transverse port in communication with said central opening;
• a ball valve assembly disposed in said housing and having a closed position preventing fluid flow through said central opening and an open position allowing fluid flow through said central opening;
• a mandrel disposed in close slidable engagement in said housing and operatively engaged with said ball valve assembly such that movement of said mandrel will actuate said ball valve assembly between said open and closed positions thereof;
• a valve sleeve slidably disposed in said housing and connected to said mandrel for mutual sliding movement therewith in said housing, said valve sleeve defining a port therethrough in communication with said port in said housing when in an open position and sealingly separated from said port in said housing when in a closed position;
• and
• pressure responsive means for acting on said valve sleeve for moving the valve sleeve between said open and closed positions thereof and thereby actuating said mandrel and said ball valve assembly in response to a pressure in a well annulus.