The first open hole expandable sand screen (ESS) has been field tested in a Shell Expro Ltd. well in the southern North Sea (Fig. 1 [96,757 bytes]). Petroline Wellsystems Ltd., Aberdeen. manufactured the ESS.
The ESS is an extension of the expandable casing technology (OGJ June 6, 1996, p. 31) pioneered by Shell and licensed by several service companies.
Petroline is developing the ESS for open hole, cased hole, and remedial applications. Petroline describes the ESS as consisting of a sand-exclusion screen that is capable of considerable expansion when a cone-shaped mandrel is driven through it. This allows the screen to be run in a preformed condition into the well, then expanded i...