Control systems comprising supplementary closure devices and inwardly inflating pack-off devices

Abstract

A supplementary closure device system comprising: a tubular, a supplementary closure device disposed in the tubular, wherein the supplementary close device comprises a housing and one or more flapper fingers disposed on the housing, and a pack-off device and associated methods.

What is claimed is: 
     
         1 . A supplementary closure device system comprising: a tubular, a supplementary closure device disposed in the tubular, wherein the supplementary close device comprise a housing and one or more flapper fingers disposed on the housing, and a pack-off device. 
     
     
         2 . The supplementary closure device system of  claim 1 , wherein the tubular comprises a casing string or a liner. 
     
     
         3 . The supplementary closure device system of  claim 1 , wherein the supplementary closure device comprises 6 flapper fingers. 
     
     
         4 . The supplementary closure device system of  claim 1 , wherein the pack-off device comprises an inwardly inflating inflatable packer. 
     
     
         5 . The supplementary closure device system of  claim 1 , wherein the supplementary closure device is capable of transitioning from an open position to a closed position. 
     
     
         6 . The supplementary closure device system of  claim 1 , wherein the supplementary closure device is in an open position. 
     
     
         7 . The supplementary closure device system of  claim 1 , wherein the supplementary closure device is in a closed position. 
     
     
         8 . The supplementary closure device system of  claim 1 , wherein the pack-off device is in an uninflated position. 
     
     
         9 . The supplementary closure device system of  claim 1 , wherein the pack-off device is in an inflated position. 
     
     
         10 . A supplementary closure device system comprising: a tubular, a supplementary closure device disposed in the tubular, wherein the supplementary close device comprise a housing and one or more flapper fingers disposed on the housing, a pipe passing through the supplementary closure device; and a pack-off device. 
     
     
         11 . The supplementary closure device system of  claim 10 , wherein the tubular comprises a casing string or a liner. 
     
     
         12 . The supplementary closure device system of  claim 10 , wherein the supplementary closure device comprises 6 flapper fingers. 
     
     
         13 . The supplementary closure device system of  claim 10 , wherein the pack-off device comprises an inwardly inflating inflatable packer. 
     
     
         14 . The supplementary closure device system of  claim 10 , wherein the supplementary closure device is capable of transitioning from an open position to a partially closed position. 
     
     
         15 . The supplementary closure device system of  claim 10 , wherein the supplementary closure device is in an open position. 
     
     
         16 . The supplementary closure device system of  claim 10 , wherein the supplementary closure device is in a partially closed position. 
     
     
         17 . The supplementary closure device system of  claim 10 , wherein the pack-off device is in an uninflated position. 
     
     
         18 . The supplementary closure device system of  claim 10 , wherein the pack-off device is in an inflated position. 
     
     
         19 . A method comprising: providing a supplementary closure device system comprising a supplementary closure device, a pack-off device, and a tubular and activating the supplementary closure device to seal the tubular. 
     
     
         20 . The method of  claim 19 , further comprising activating the pack-off device.