Negative Equipment LL with PGNiG

Copernicus (6608/1-1 S) – Surface section

What happened:

When the rig reached a TD of 1100 m and no contingency 4-string design was needed anymore, the 20″ equipment got sent onshore (Sandnessøen), that includes the belt tongs. After some thinking offshore of what contingency HPWHH and X/O needed to make up the back-up HPWHH, it was found out that 20″ belt tongs would be needed and had to send Coey Viking to Sandnessjøen to pick it up.

There was one X/O from Vam21 Box to VTOP Pin, and that is the No-cross coupling. If that got damaged we would have to go for the B/U 20″ HPWHH since we have no other X/O’s.

What was planned:

To have back-up 20″ wellhead and make it up to a 20″ x 13 3/8″ X/O if needed to run back-up HPWHH 20″ x 13 3/8″ casing string.

What was learned:

It’s some mess around with that many different configurations for primary and back-up shoes and HPWHH that it’s difficult to have the full overview when the offshore personnel has not been part of the planning.

It’s also crucial to have a B/U X/O and not only rely on the one sent out. The no-cross X/O is made up of two pups, but if Vam21 Box end is damaged, there is no back-up.

What actions are required:

Try to configure primary and back-up as easy as possible, and for example (if possible) have B/U 18 3/4″ have already crossed over to 13 3/8″ in one joint.

Have one back-up X/O from HPWHH to casing string.

What Was Done

Coey Viking was sent from rig to Sandnessjøen to pick up the 20″ belt tongs to have as a back-up solution if back-up HPWHH was to be run.