Tatneft Company widely uses its Expandable Profile Liner technology to mitigate drilling troubles. In 2008 severe lost circulation zones encountered
while drilling a 124-mm. sidetrack from wells No. 207z and 5912z were shut off by 23-m and 60-m Expandable Profile Liners of P-146 type. The
economic effect of application of trouble zone isolation technology using Expandable Profile Liners while drilling sidetracks amounted to RUR
392.8 thous. per well.
sidetrack
horizontal sidetrack
disastrous lost circulation
isolation of lost circulation zones
hole underreaming
Expandable Profile Liner
underreamer
expander
