BiSN deploys largest-ever bismuth plug
HOUSTON -- BiSN, the global leader in metal-to-metal downhole sealing solutions, has achieved a world first in conjunction with AkerBP and Altus Intervention, through the successful deployment of the largest-ever bismuth plug.
Following over a year of development, BiSN’s award-winning Wel-lok M2M technology - which can be utilized during well and rigless well abandonment – was deployed via E-line in collaboration with Altus Intervention in AkerBP’s Valhall A-30 well in the Norwegian North Sea.
The Wel-lok M2M technology aims to bring substantial savings to operators by eliminating rig costs and doing the work rigless.
Conducted as a field trial, the tool was set to evaluate the effectiveness of bismuth as a permanent seal for P&A operations in lieu of cement. With 3,500 kg of bismuth alloy, a gas tight surface seal was created inside 18 5/8-in. casing through a section milled window cut in the 13 3/8-in. casing, entering previously unchartered territory regarding weight, size and precise setting procedures.
