CLAIMS CAN BE found in technical literature for using mono-diameter expandable liners in deepwater applications. In a technical review of the existing mono-diameter expandable liner systems by various vendors, it is concluded that mono-diameter expandable liner can be considered for use as a drilling liner if certain prerequisites, as discussed in this article, are met. Further, the technology can be used in brownfield development where no pore pressure surprises are expected. In any case, once drilling to target has been achieved, the liner must be covered by a conventional casing. Proper risk evaluation before running in the hole is recommended, given the high costs associated with deepwater wells.
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