Piston’s well control personnel was mobilized and froze the wellbore. BOP doors were opened and folded pipe was confirmed. The rig assist unit was stripped off and pipe was cut at the primary annular and a 7-10 master valve was installed. The service rig and rig assist unit demobilized with 80 jts of tubing bha and packers left in well.
Piston rigged up a 285k rigless unit with substructure on top of the 7-10 master valve to a workfloor height of 32m. Pipe was milled out of the stack with a 6-15/16” mill on custom 4” pipe centralized mill to mill through the master valve while holding 4000psi on the annulus. Once pipe was milled into 4 1⁄2 casing, e-line was rigged up and a camera was run to determine pipe was round. We latched onto the tubing with an overshot, cut above packer and installed permanent plugs. The tubing was snubbed out and rih with overshot to attempt to jar the packer free. After being unable to free the string, pooh, rih with washpipe and washover slips on packer. Several runs were needed due to debris from milling pipe in the stack. Once the slips were gone, rih latch onto packer, jar free, pooh, rih with venturi tool and cleaned the heel section to the top port.