Page 117 - Well Control for Completions and Interventions

Completion Equipment 109

Figure 3.18 Seal assembly and liner top run in conjunction with a production
packer.

3.7 FLUID LOSS CONTROL VALVES

Fluid loss is a problem during many open hole completions. A
range of downhole valves have been developed that can help control
losses while the upper completion is being run. Different vendors call the
loss control valves different names, but they all have the same function; to
provide a downhole mechanical barrier.
• Halliburton—formation saver valve (FSV)
• Schlumberger—formation isolation valve (FIV)
• Baker—fluid loss control valve (FLCV)
• Weatherford—fluid loss valve (FLV).
Loss control valves are usually run with the lower (sand-face) comple-
tion. For example, in gravel pack wells the valve is run below the gravel
pack packer and above the sand control screen. After gravel packing the
well, the service tool and washpipe are recovered to the surface. A shifting
tool on the end of the washpipe closes the FLCV, isolating the reservoir
and forming a well control mechanical barrier. Once the upper completion