Solution & Implementation
Installation of the new well demanded a reliable and versatile casing cutter, one able to cope with the harsh environment. Casing cutting is a cold cutting technique that produces a precision cut and is vital to the critical path operation since it enables the fitting of both the pack off seals and the wellhead itself.
Designed by Furmanite, an air-powered, cutting machine was used to avoid the problems of working in an intrinsically safe environment usually associate with offshore activities. Each casing joint was 10.75 inches in diameter, with a wall thickness of 0.75 inches, and made from C110 high-grade carbon steel. The Furmanite machine is mounted on the casing using clamping jaws gripping the casing outside diameter for external cuts and the hub face for internal cuts, eliminating any requirement for hot work. The cut takes approximately 3 hours and a total casing cut can be completed in about 5 hours, including rigging up and rigging down. Furmanite technicians were on hand to offer additional expertise on-site during the cutting process.