Unformatted text preview: onventional procedures. These are
minor procedure differences, though,
that can play an important role in this
type of operation.
108 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 54 Basic blowout preventer design logic has
been extended to subsea preventers with
several precautionary components added.
The basic blowout preventer stack(Fig.8)
included tow annular preventers rather
than the conventional solitary unit. Shear
rams are place on the bottom of the stack.
110 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 55 Mud displacement in the choke line as a result of
gas being pumped from the well has used great
Fig.9 demonstrates another problem inherent with
deepwater drilling.After the well is dead, the
annular preventer cannot be opened because of
the original density mud in the riser. It is necessary
to close the bottom set of rams and reverse
circulate kill density mud down the choke line and
up the riser in order to completely kill the well
111 Fig.8 Fig.9 Copyright(c) 2005 by Ali Ghalambor & Boyun Guo 112 56 Accum...
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- Fall '14
- Boyun Guo, Ali Ghalambor