Case studies
Decommissioning platforms
When decommissioning the platforms wells Mirage have designed a system of drilling and pinning the multiple casing strings. The system has been used extensively in the North Sea and Gulf of Mexico to pin up to 48” multiple casing strings and piles in both surface and sub sea applications with 4,6,10 and 12" spindles and cutters available.
Details
Location
North Sea - UK & Norway, Gulf of Mexico surface and sub sea
Equipment Utilised
Mirage DDU1636 and DDU3248ss double drill pinning machines that have hollow spindles to core out to the inner casing through pipe and grout.
Method
For surface cuts the band saw has a mechanical vice jaw that clamps around the casing and then an auto feed system to feed the blade through. A 48” multiple casing is cut in approx 40 minutes giving a fast, efficient, cost effective cold cutting method for cutting multiple casing strings with or without grouted annuli.
