Page 184 - Well Control for Completions and Interventions

176 Well Control for Completions and Interventions

Figure 4.27 Full opening safety valve (FOSV).

Kill, Kick Detection and Well Shut In, but in summary the main con-
cerns are:
• If control lines, instrument cables, or ESP cables are being run with the
tubing, it will not be possible to close in the annulus, as the cables will
prevent both annular and pipe preventers from sealing around the tub-
ing. To enable the well to be closed in when cables are across the BOP
stack, a “kick stand” should be racked back in the derrick. The stand
should be made up from joints of drill pipe with a cross-over to what-
ever tubing is in the rotary table at the bottom, and a FOSVat the top.
In the event of a kick, the control lines must be cut and the kill-
stand made up to the tubing in the well. Once made up, the FOSV is
closed and the stand lowered across the BOP stack, only then can the
annular or pipe rams be closed.
• There will be circumstances during the tripping of completion tubu-
lars and equipment when closing the annular preventer or the pipe
rams will not prevent flow. This would include tripping badly cor-
roded or holed pipe and the running of sand control screes or slotted