Challenge:Norsk Hydro’s Well 6407/7-A-4
experienced severe losses
during drilling out after the
primary cement job. Several
lost circulation material (LCM)
pills were pumped, but losses
soon recurred.
Solution:On January 27, after 87 h spent
trying to cure the losses with
conventional methods, it was
decided to pull out of hole with
the BHA and use the running
squeeze method to place a
cement slurry incorporating
CemNET* LCM fibers.
Results: Slurry with CemNET fibers
was successful when other
loss control treatments had
failed. Circulation losses were
cured and full circulation
was reestablished after the
CemNET squeeze.