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Well Dynamic Behaviour 253
downhole
safety valve
reservoir isolation
packers
control valves
with sensors
Figure 10.25 Smart well example.
production
packer
main bore
sliding
sleeve
lateral
isolation
packer
nipple
profile
Figure 10.26 Multilateral example.
than drilling a new well. If the original wellbore is not abandoned, but only
temporarily isolated and a sidetrack drilled, production or injection from both
the sidetrack and original wellbore can be achieved. This is a multilateral. There is
no limit to how many laterals can be drilled from one bore, though more than five
laterals are rare. Figure 10.26 shows a two branch multilateral. In this case,
the completion has been designed to maintain access into the original bore and to