Innovative dual-valve technology provides solution
Schlumberger proposed using the IRDV intelligent remote dual valve that
is rated to 30,000-psi absolute ID and OD pressure. The IRDV dual valve
combines two fullbore multicycle valves—a tester valve and a circulating
valve—that can be cycled independently or sequentially for increased
flexibility. This feature met the operator’s requirement that both valves
remain downhole to ensure well control. The dual valve also enhances safety
with lower-pressure, nitrogen-free operation and minimizes operating time by
using automatic valve sequence commands.
Met all test objectives within outlined parameters
The reservoir was perforated using both a 25,000-psi HSD high shot
density perforating gun system and 25,000-psi eFire electronic firing heads.
Then, the IRDV dual valve was used to successfully pressure test the string up
to absolute pressure of 28,400 psi at depth. This enabled evaluating the coated
pipe condition prior to gravel-pack operations in a single run, thereby
eliminating the need to perform a flex trip, saving costly rig time in the
extreme ultradeepwater environment. The circulating valve reversed out the
workstring volume at 1.11 m3/min [7 bbl/min]. With these results,
the operator metall of its test objectives within outlined parameters.