Surface Controlled Downhole Shut-In Valve

Abstract

A tool assembly having a downhole shut-in valve, a packer, and one or more ports. The downhole shut-in valve may be configured to selectively permit flow from a conduit to a target zone of a wellbore. The packer may be configured to isolate the target zone of the wellbore. The ports may be between the conduit and the target zone. The downhole shut-in valve may be configured to close in about 5 seconds or less.

1 . A tool assembly, comprising:
 a downhole shut-in valve configured to selectively permit flow from a conduit to a target zone of a wellbore;   a packer configured to isolate the target zone of the wellbore; and   one or more ports between the conduit and the target zone;   wherein the downhole shut-in valve is configured to close in about 5 seconds or less.   
     
     
         2 . The tool assembly of  claim 1 , wherein the downhole shut-in valve is configured to close in about one second or less. 
     
     
         3 . The tool assembly of  claim 1 , wherein the downhole shut-in valve comprises an outer body, an inner sleeve, a sleeve activator, and a sleeve activator arm. 
     
     
         4 . The tool assembly of  claim 1 , comprising a pressure gauge. 
     
     
         5 . The tool assembly of  claim 1 , comprising a spacer section. 
     
     
         6 . The tool assembly of  claim 1 , comprising a second packer. 
     
     
         7 . A method of testing a target zone of a well, comprising:
 lowering a tool assembly comprising one or more packers, conduit, and a downhole shut-in valve to the target zone;   setting the packers so as to isolate the target zone;   allowing fluid to pass from within the conduit into the isolated target zone;   closing the downhole shut-in valve; and   monitoring pressure in the isolated target zone;   wherein monitoring pressure in the isolated target zone is performed after closing the downhole shut-in valve.   
     
     
         8 . The method of testing of  claim 7 , wherein allowing fluid to pass from within the conduit into the isolated target zone comprises opening the downhole shut-in valve. 
     
     
         9 . The method of testing of  claim 8 , wherein opening the downhole shut-in valve is performed prior to closing the downhole shut-in valve. 
     
     
         10 . The method of testing of  claim 7 , wherein the conduit is coiled tubing and wherein lowering the tool assembly comprises running the tool assembly on the coiled tubing. 
     
     
         11 . The method of testing of  claim 7 , wherein closing the downhole shut-in valve comprises transmitting a signal from the surface to the downhole shut-in valve. 
     
     
         12 . The method of testing of  claim 11 , wherein the signal causes the downhole shut-in valve to close instantaneously. 
     
     
         13 . The method of testing of  claim 7 , wherein monitoring pressure in the isolated target zone comprises taking multiple measurements within the isolated target zone and sending the measurements to the surface for analysis. 
     
     
         14 . The method of testing of  claim 13 , comprising taking measurements every second over a period of time. 
     
     
         15 . The method of testing of  claim 7 , wherein the downhole shut-in valve retains fluid in the conduit, thereby acting as a fluid control valve. 
     
     
         16 . The method of testing of  claim 7 , wherein the downhole shut-in valve is opened and/or closed at will. 
     
     
         17 . The method of testing of  claim 16 , wherein opening and/or closing the downhole shut-in valve comprises transmitting a signal from the surface to the downhole shut-in valve.