Spokeswoman Hannah August declined comment Monday.
The 50-foot, 300-ton device, which was lifted to the surface Saturday, is expected to be analyzed at a NASA facility in Louisiana.
It is unclear, meanwhile, exactly when the final plugging of the well will take place.
Relief well drilling was supposed to resume after Labor Day. The government's point man on the spill response said Saturday he wanted to wait before giving a firm updated timeline. BP said recently it didn't expect to finish the relief well until mid-September.
The Deepwater Horizon exploded April 20, killing 11 and leading to the massive oil spill in the Gulf.