INNOVATIVE COILED-TUBING SLIMWELL-COMPLETION TECHNOLOGY

摘要

Smaller riser and casing configurations have significant advantages over conventional well architecture in deepwater operations. A joint industry project to reduce wellbore size while overcoming the associated problems of surge and swab pressures when installing casing resulted in a unique liner-hanger system that mechanically seals the new liner to the shoe of the previous liner, forming a high-pressure metal-to-metal seal while retaining original tensile-load capacity. The novel conveyance system permits a high-fluid-circulation rate while the liner is deployed and landed in the well, with a conventional mode for hole-cleaning and cementing operations.