BP has begun replacing the existing lower marine riser package (LMRP) containment cap over Deepwater Horizon’s failed blow-out preventer with a new sealing cap assembly, the company reported.

The Discoverer Enterprise removed the LMRP cap on Saturday, with initial steps including the removal of six bolts along with the LMRP’s flange.

A transition spool was subsequently installed on the existing flange, the company said in a statement.

The next step is to install a capping stack that has three closing rams.

The containment system continues to capture oil and gas from the MC252 well and flare the hydrocarbons safely at the surface, BP said.

Meanwhile, BP is in talks with US oil and gas company Apache Corporation and other companies about potential asset sales, according to Reuters.

In June BP said it wanted to raise $10bn from sell-offs to boost a $20bn fund to clean up the worst oil spill in US history.