Figure F5. Photographs of perforated and screened components permitting monitoring and sampling from isolated intervals at depth below the seafloor, Expedition 327. A. Perforated drill collar being made up to a bullnose at the end of a CORK casing string. Collar and bullnose were coated internally and externally with epoxy compounds intended to reduce reactivity with warm formation fluids and seawater. B. Close-up of perforated drill collar running into the moonpool, with lines of 2 inch holes separated by 9 inches. C. Perforated and coated 5½ inch casing being cleaned with alcohol prior to deployment. Lines of 1½ inch perforations are separated by 8 inches. D. Pressure miniscreen (stainless steel, wire wrap, 1 m long) made up to the outside of the 4½ inch casing immediately below an inflatable casing packer. E. Geochemical sampling miniscreens (stainless steel, wire wrap, 1 m long) made up on the outside of perforated and coated 5½ inch casing located below inflatable packer element and above drill collars. F. Microbiology miniscreen (titanium, wire wrap, 1 m long) being attached to the outside of perforated and coated 5½ inch casing, just above the drill collars.
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